-
The Galactic bulge exploration Astron. Astrophys. (IF 6.5) Pub Date : 2024-04-19 Z. Prudil, A. Kunder, I. Dékány, A. J. Koch-Hansen
We present a new set of period–absolute magnitude–metallicity (PMZ) relations for single-mode RR Lyrae stars calibrated for the optical GBP, V, G, GRP, near-infrared I, J, H, and Ks passbands. We compiled a large dataset (over 100 objects) of fundamental and first-overtone RR Lyrae pulsators consisting of mean intensity magnitudes, reddenings, pulsation properties, iron abundances, and parallaxes measured
-
The neutrino background from non-jetted active galactic nuclei Astron. Astrophys. (IF 6.5) Pub Date : 2024-04-19 P. Padovani, R. Gilli, E. Resconi, C. Bellenghi, F. Henningsen
Aims. We calculate the contribution to the neutrino background from the non-jetted active galactic nuclei (AGN) population following the recent IceCube association of TeV neutrinos with NGC 1068.Methods. We exploited our robust knowledge of the AGN X-ray luminosity function and evolution and converted it to the neutrino band by using NGC 1068 as a benchmark, together with a theoretically motivated
-
Age of (152830) Dinkinesh I Selam constrained by secular tidal-BYORP theory Astron. Astrophys. (IF 6.5) Pub Date : 2024-04-19 C. C. Merrill, A. R. Kubas, A. J. Meyer, S. D. Raducan
We constrained the age of the main belt binary asteroid system, (152830) Dinkinesh, through secular dynamics and assuming the secondary, Selam, is at equilibrium. We reproduced Selam’s current semi-major axis and rotation period and Dinkinesh’s current rotation period, starting from the initial conditions of the spin-up fission event. The method presented here includes the secular effects of YORP,
-
Once in a blue stream Astron. Astrophys. (IF 6.5) Pub Date : 2024-04-17 David Martínez-Delgado, Santi Roca-Fàbrega, Armando Gil de Paz, Denis Erkal, Juan Miró-Carretero, Dmitry Makarov, Karina T. Voggel, Ryan Leaman, Walter Bolchin, Sarah Pearson, Giuseppe Donatiello, Evgenii Rubtsov, Mohammad Akhlaghi, M. Angeles Gomez-Flechoso, Samane Raji, Dustin Lang, Adam Block, Jesus Gallego, Esperanza Carrasco, María Luisa García-Vargas, Jorge Iglesias-Páramo, Sergio Pascual, Nicolas
Aims. In this work we study the striking case of a narrow blue stream with a possible globular cluster-like progenitor around the NGC 7241 galaxy and its foreground dwarf companion. We want to figure out if the stream was generated by tidal interaction with NGC 7241 or if it first interacted with the foreground dwarf companion and later both fell together toward NGC 7241.Methods. We used four sets
-
The central black hole in the dwarf spheroidal galaxy Leo I: Not supermassive, at most an intermediate-mass candidate Astron. Astrophys. (IF 6.5) Pub Date : 2024-04-17 R. Pascale, C. Nipoti, F. Calura, A. Della Croce
It has recently been claimed that a surprisingly massive black hole (BH) is present in the core of the dwarf spheroidal galaxy (dSph) Leo I. This finding, based on integral field spectroscopy, challenges the typical expectation that dSphs host intermediate-mass BHs since such a BH would be classified as supermassive. Indeed, the analysis points toward Leo I harboring a BH with a lower mass limit exceeding
-
EPOCHS. II. The Ultraviolet Luminosity Function from 7.5 < z < 13.5 Using 180 arcmin2 of Deep, Blank Fields from the PEARLS Survey and Public JWST Data Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Nathan J. Adams, Christopher J. Conselice, Duncan Austin, Thomas Harvey, Leonardo Ferreira, James Trussler, Ignas Juodžbalis, Qiong Li, Rogier Windhorst, Seth H. Cohen, Rolf A. Jansen, Jake Summers, Scott Tompkins, Simon P. Driver, Aaron Robotham, Jordan C. J. D’Silva, Haojing Yan, Dan Coe, Brenda Frye, Norman A. Grogin, Anton M. Koekemoer, Madeline A. Marshall, Nor Pirzkal, Russell E. Ryan, W. Peter
We present an analysis of the ultraviolet luminosity function (UV LF) and star formation rate density of distant galaxies (7.5 < z < 13.5) in the “blank” fields of the Prime Extragalactic Areas for Reionization and Lensing Science (PEARLS) survey combined with Early Release Science data from the CEERS, GLASS, and NGDEEP surveys/fields and the first data release of JADES. We use strict quality cuts
-
The Reservoir of the Per-emb-2 Streamer Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Kotomi Taniguchi, Jaime E. Pineda, Paola Caselli, Tomomi Shimoikura, Rachel K. Friesen, Dominique M. Segura-Cox, Anika Schmiedeke
Streamers bring gas from outer regions to protostellar systems and could change the chemical composition around protostars and protoplanetary disks. We have carried out mapping observations of carbon-chain species (HC3N, HC5N, CCH, and CCS) in the 3 mm and 7 mm bands toward the streamer flowing to the Class 0 young stellar object (YSO) Per-emb-2 with the Nobeyama 45 m radio telescope. A region with
-
Comparison of Solar Multifrequency Microwave Data with Other Solar Indices for Understanding Solar and Stellar Microwave Data Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Masumi Shimojo, Kosuke Namekata, Kazumasa Iwai, Ayumi Asai, Kyoko Watanabe
Thermal microwave emissions detected from stellar atmospheres contain information on stellar activity. However, even for the Sun, the relationship between multifrequency microwave data and other activity indices remains unclear. We investigated the relationships among the thermal microwave fluxes with 1, 2, 3.75, and 9.4 GHz, their circular polarizations, and several activity indices recorded during
-
Cloud Formation by Supernova Implosion Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Leonard E. C. Romano, Manuel Behrendt, Andreas Burkert
The deposition of energy and momentum by supernova explosions has been subject to numerous studies in the past few decades. However, while there has been some work that focused on the transition from the adiabatic to the radiative stage of a supernova remnant (SNR), the late radiative stage and merging with the interstellar medium (ISM) have received little attention. Here, we use three-dimensional
-
High-resolution X-Ray Spectroscopy of Interstellar Iron toward Cygnus X-1 and GX 339-4 Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Lía Corrales, Eric V. Gotthelf, Efrain Gatuzz, Timothy R. Kallman, Julia C. Lee, Michael Martins, Frits Paerels, Ioanna Psaradaki, Stefan Schippers, Daniel Wolf Savin
We present a high-resolution spectral study of Fe L-shell extinction by the diffuse interstellar medium (ISM) in the direction of the X-ray binaries Cygnus X-1 and GX 339–4, using the XMM-Newton reflection grating spectrometer. The majority of interstellar Fe is suspected to condense into dust grains in the diffuse ISM, but the compounds formed from this process are unknown. Here, we use the laboratory
-
Fermi Large Area Telescope Detection of Gamma Rays from the NGC 6251 Radio Lobe Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Yu-Wei Yu, Hai-Ming Zhang, Ying-Ying Gan, Xin-Ke Hu, Tan-Zheng Wu, Jin Zhang
We report the detection of extended γ-ray emission from lobes in the radio galaxy NGC 6251 using observation data from the Fermi Large Area Telescope. The maximum likelihood analysis results show that a radio morphology template provides a better fit than a pointlike source description for the observational data at a confidence level of 8.1σ, and the contribution of lobes constitutes more than 50%
-
Fossil Signatures of Main-sequence Convective Core Overshoot Estimated through Asteroseismic Analyses Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Christopher J. Lindsay, J. M. Joel Ong, Sarbani Basu
Some physical processes that occur during a star's main-sequence evolution also affect its post-main-sequence evolution. It is well known that stars with masses above approximately 1.1 M ⊙ have well-mixed convective cores on the main sequence; however, the structure of the star in the neighborhood of the convective core regions is currently underconstrained. We use asteroseismology to study the properties
-
White Dwarf Merger Remnants: The DAQ Subclass Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Mukremin Kilic, Pierre Bergeron, Simon Blouin, Gracyn Jewett, Warren R. Brown, Adam Moss
Four years after the discovery of a unique DAQ white dwarf with a hydrogen-dominated and carbon-rich atmosphere, we report the discovery of four new DAQ white dwarfs, including two that were not recognized properly in the literature. We find all five DAQs in a relatively narrow mass and temperature range of M = 1.14–1.19 M ⊙ and T eff = 13,000–17,000 K. In addition, at least two show photometric variations
-
The Initial Conditions of Clustered Core Collapse: Multiwavelength Analysis of Oph A SM1N and N6 at 100 au Resolution Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Rachel K. Friesen, Tyler L. Bourke, Paola Caselli, James Di Francesco, Zhi-Yun Li, Jaime E. Pineda
We present new Atacama Large Millimeter/submillimeter Array (ALMA) continuum and NH2D, N2D+, and H2D+ line emission at matched, ∼100 au resolution toward the dense star-forming cores SM1N and N6 within the Ophiuchus molecular cloud. We determine the density and temperature structure of SM1N based on radiative transfer modeling and simulated observations of the multiwavelength continuum emission at
-
Joint Observations of Energy Transport and Dissipation during Plasma Flow Vortex in the Terrestrial Magnetotail Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Wei Wang, Yuduan Ma, M. W. Dunlop, Tianran Sun, I. J. Rae, Xinhua Wei, Junying Yang, Youjun Yang
Plasma flow vorticity is ubiquitous in space and plays a key role in material mixing and energy transfer. The five THEMIS satellites orbiting in different regions of the terrestrial magnetotail provide an unprecedented opportunity to study the temporal–spatial evolution characteristics of a plasma flow vortex on large spatial scales. We present an analysis of the flow vorticity that occurred between
-
Beyond the Background: Gravitational-wave Anisotropy and Continuous Waves from Supermassive Black Hole Binaries Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Emiko C. Gardiner, Luke Zoltan Kelley, Anna-Malin Lemke, Andrea Mitridate
Pulsar timing arrays have found evidence for a low-frequency gravitational-wave background (GWB). Assuming that the GWB is produced by supermassive black hole binaries (SMBHBs), the next gravitational-wave (GW) signals astronomers anticipate are continuous waves (CWs) from single SMBHBs and their associated GWB anisotropy. The prospects for detecting CWs and anisotropy are highly dependent on the astrophysics
-
Shell-type Tidal Features Are More Frequently Detected in Slowly Rotating Early-type Galaxies than Stream- and Tail-type Features Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Yongmin Yoon, Jongwan Ko, Haeun Chung, Woowon Byun, Kyungwon Chun
To enhance our understanding of the impact of galaxy mergers on the kinematics of early-type galaxies (ETGs), we examine differences in specific stellar angular momentum within the half-light radius ( λRe ) among ETGs with different types of tidal features and those without such features. This is accomplished by categorizing tidal features, which serve as direct evidence of recent mergers, into shells
-
Formation of Polar Crown Filament Magnetic Fields by Supergranular Helicity Injection Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Huanxin Chen, Chun Xia, Hechao Chen
To understand the magnetic fields of the polar crown filaments (PCFs) at high latitudes near polar regions of the Sun, we perform magnetofrictional numerical simulations on the long-term magnetic evolution of bipolar fields with roughly east–west polarity inversion lines (PILs) in a 3D spherical wedge domain near polar regions. The Coriolis-effect-induced vortical motions at the boundaries of several
-
Constraining Protoplanetary Disk Winds from Forbidden Line Profiles with Simulation-based Inference Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Ahmad Nemer, ChangHoon Hahn, Jiaxuan Li, Peter Melchior, Jeremy Goodman
Protoplanetary disks (PPDs) are sites of vigorous hydrodynamic processes, such as accretion and outflows, and ultimately establish the conditions for the formation of planets. The properties of disk outflows are often inferred through the analysis of forbidden emission lines. These lines contain multiple overlapping components, tracing different emission regions with different processes that excite
-
Assessment of SDSS-derived Galaxy Morphologies Using HST Imaging Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Chandler Osborne, Samir Salim
The Sloan Digital Sky Survey (SDSS) was foundational to the study of galaxy evolution, having revealed the bimodality of galaxies and the relationship between their structure and star-forming activity. However, ground-based optical surveys like SDSS are limited in resolution and depth, which may lead to biases or poor quality in the derived morphological properties, potentially impacting our understanding
-
Merger-tree-based Galaxy Matching: A Comparative Study across Different Resolutions Astrophys. J. (IF 4.9) Pub Date : 2024-04-17 Minyong Jung, Ji-hoon Kim, Boon Kiat Oh, Sungwook E. Hong, Jaehyun Lee, Juhan Kim
We introduce a novel halo/galaxy matching technique between two cosmological simulations with different resolutions, which utilizes the positions and masses of halos along their subhalo merger tree. With this tool, we conduct a study of resolution biases through the galaxy-by-galaxy inspection of a pair of simulations that have the same simulation configuration but different mass resolutions, utilizing
-
Orbital obliquity of the young planet TOI-5398 b and the evolutionary history of the system⋆⋆⋆ Astron. Astrophys. (IF 6.5) Pub Date : 2024-04-16 G. Mantovan, L. Malavolta, D. Locci, D. Polychroni, D. Turrini, A. Maggio, S. Desidera, R. Spinelli, S. Benatti, G. Piotto, A. F. Lanza, F. Marzari, A. Sozzetti, M. Damasso, D. Nardiello, L. Cabona, M. D’Arpa, G. Guilluy, L. Mancini, G. Micela, V. Nascimbeni, T. Zingales
Multi-planet systems exhibit remarkable architectural diversity. However, short-period giant planets are typically isolated. Compact systems like TOI-5398, with an outer close-orbit giant and an inner small-size planet, are rare among systems containing short-period giants. TOI-5398’s unusual architecture coupled with its young age (650 ± 150 Myr) make it a promising system for measuring the original
-
Zooming in on the circumgalactic medium with GIBLE Astron. Astrophys. (IF 6.5) Pub Date : 2024-04-16 Rahul Ramesh, Dylan Nelson, Drummond Fielding, Marcus Brüggen
We used a cosmological zoom-in simulation of a Milky Way-like galaxy to study and quantify the topology of magnetic field lines around cold gas clouds in the circumgalactic medium (CGM). This simulation is a new addition to Project GIBLE, a suite of cosmological magnetohydrodynamic simulations of galaxy formation with preferential super-Lagrangian refinement in the CGM, reaching an unprecedented CGM
-
Cosmic hide and seek: The volumetric rate of X-ray quasi-periodic eruptions Astron. Astrophys. (IF 6.5) Pub Date : 2024-04-16 R. Arcodia, A. Merloni, J. Buchner, P. Baldini, G. Ponti, A. Rau, Z. Liu, K. Nandra, M. Salvato
Multiwavelength extragalactic nuclear transients, particularly those detectable as multi-messengers, are among the primary drivers for the next-generation observatories. X-ray quasi-periodic eruptions (QPEs) are the most recent and perhaps most peculiar addition to this group. Here, we report a first estimate of the volumetric rate of QPEs based on the first four discoveries with the eROSITA X-ray
-
Constraints on supermassive black hole binaries from JWST and NANOGrav Astron. Astrophys. (IF 6.5) Pub Date : 2024-04-16 Hamsa Padmanabhan, Abraham Loeb
We use the recent statistics of dual active galactic nuclei (AGN) in the James Webb Space Telescope (JWST) data at z ∼ 3.4 to address two aspects of the feedback and evolution scenarios of supermassive black hole binaries. We find that the JWST data provide evidence for the members of a binary BH being ‘lit’ at the same time, rather than independently – a scenario which is consistent with gas-rich
-
Spectroscopic observations of progenitor activity 100 days before a Type Ibn supernova⋆ Astron. Astrophys. (IF 6.5) Pub Date : 2024-04-16 S. J. Brennan, J. Sollerman, I. Irani, S. Schulze, P. Chen, K. K. Das, K. De, C. Fransson, A. Gal-Yam, A. Gkini, K. R. Hinds, R. Lunnan, D. Perley, Y. J. Qin, R. Stein, J. Wise, L. Yan, E. A. Zimmerman, S. Anand, R. J. Bruch, R. Dekany, A. J. Drake, C. Fremling, B. Healy, V. Karambelkar, M. M. Kasliwal, M. Kong, S. R. Kulkarni, F. J. Masci, R. S. Post, J. Purdum, R. Michael Rich, A. Wold
Obtaining spectroscopic observations of the progenitors of core-collapse supernovae is often unfeasible, due to an inherent lack of knowledge as to what stars experience supernovae and when they will explode. In this Letter we present photometric and spectroscopic observations of the progenitor activity of SN 2023fyq before the He-rich progenitor explodes as a Type Ibn supernova. The progenitor of
-
A JWST Survey of the Supernova Remnant Cassiopeia A Astrophys. J. Lett. (IF 7.9) Pub Date : 2024-04-16 Dan Milisavljevic, Tea Temim, Ilse De Looze, Danielle Dickinson, J. Martin Laming, Robert Fesen, John C. Raymond, Richard G. Arendt, Jacco Vink, Bettina Posselt, George G. Pavlov, Ori D. Fox, Ethan Pinarski, Bhagya Subrayan, Judy Schmidt, William P. Blair, Armin Rest, Daniel Patnaude, Bon-Chul Koo, Jeonghee Rho, Salvatore Orlando, Hans-Thomas Janka, Moira Andrews, Michael J. Barlow, Adam Burrows, Roger
We present initial results from a James Webb Space Telescope (JWST) survey of the youngest Galactic core-collapse supernova remnant, Cassiopeia A (Cas A), made up of NIRCam and MIRI imaging mosaics that map emission from the main shell, interior, and surrounding circumstellar/interstellar material (CSM/ISM). We also present four exploratory positions of MIRI Medium Resolution Spectrograph integral
-
Discovery of Thionylimide, HNSO, in Space: The first N-, S-, and O-bearing Interstellar Molecule Astrophys. J. Lett. (IF 7.9) Pub Date : 2024-04-16 Miguel Sanz-Novo, Víctor M. Rivilla, Holger S. P. Müller, Izaskun Jiménez-Serra, Jesús Martín-Pintado, Laura Colzi, Shaoshan Zeng, Andrés Megías, Álvaro López-Gallifa, Antonio Martínez-Henares, Belén Tercero, Pablo de Vicente, David San Andrés, Sergio Martín, Miguel A. Requena-Torres
We present the first detection in space of thionylimide (HNSO) toward the Galactic center molecular cloud G + 0.693-0.027, thanks to the superb sensitivity of an ultradeep molecular line survey carried out with the Yebes 40 m and IRAM 30 m telescopes. This molecule is the first species detected in the interstellar medium containing, simultaneously, N, S, and O. We have identified numerous K a = 0,
-
Tidal Disruption Encores Astrophys. J. Lett. (IF 7.9) Pub Date : 2024-04-16 Taeho Ryu, Rosalba Perna, Matteo Cantiello
Nuclear star clusters (NSCs), made up of a dense concentration of stars and the compact objects they leave behind, are ubiquitous in the central regions of galaxies surrounding the central supermassive black hole (SMBH). Close interactions between stars and stellar-mass black holes (sBHs) lead to tidal disruption events (TDEs). We uncover an interesting new phenomenon: for a subset of these, the unbound
-
Novel tests of gravity using nano-Hertz stochastic gravitational-wave background signals J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 Enrico Cannizzaro, Gabriele Franciolini, Paolo Pani
Gravity theories that modify General Relativity in the slow-motion regime can introduce nonperturbative corrections to the stochastic gravitational-wave background (SGWB) from supermassive black-hole binaries in the nano-Hertz band, while not affecting the quadrupolar nature of the gravitational-wave radiation and remaining perturbative in the highly-relativistic regime, as to satisfy current post-Newtonian (PN)
-
Gravitational wave probe of primordial black hole origin via superradiance J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 Indra Kumar Banerjee, Ujjal Kumar Dey
In this article we have used stochastic gravitational wave background as a unique probe to gain insight regarding the creation mechanism of primordial black holes. We have considered the cumulative gravitational wave background which consists of the primary part coming from the creation mechanism of the primordial black holes and the secondary part coming from the different mechanisms the primordial
-
Light thermal self-interacting dark matter in the shadow of non-standard cosmology J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 Shu-Yu Ho, Pyungwon Ko, Dibyendu Nanda
In this paper, we construct a viable model for a GeV scale self-interacting dark matter (DM), where the DM was thermally produced in the early universe. Here, a new vector-like fermion with a dark charge under the U(1)_D gauge symmetry serves as a secluded WIMP DM and it can dominantly annihilate into the light dark gauge boson and singlet scalar through the dark gauge interaction. Also, the self-interaction
-
Triplet scalar flavored leptogenesis with spontaneous CP violation J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 Sreerupa Chongdar, Sasmita Mishra
The inclusion of two triplet scalars in the Standard Model (SM) enables to accommodate neutrino mass generation as well as baryogenesis through leptogenesis. One of the essential ingredients of leptogenesis is the violation of charge conjugation and parity (CP) symmetry in lepton number violating decays of the triplet scalars. We work on the promising sector of spontaneous CP violation (SCPV) which
-
Probing ultralight tensor dark matter with the stochastic gravitational-wave background from advanced LIGO and Virgo's first three observing runs J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 Rong-Zhen Guo, Yang Jiang, Qing-Guo Huang
Ultralight bosons are attractive dark-matter candidates and appear in various scenarios beyond standard model. They can induce superradiant instabilities around spinning black holes (BHs), extracting the energy and angular momentum from BHs, and then dissipate through monochromatic gravitational radiation, which become promising sources of gravitational wave detectors. In this letter, we focus on massive
-
Observational constraints on extended Proca-Nuevo gravity and cosmology J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 Fotios K. Anagnostopoulos, Emmanuel N. Saridakis
We confront massive Proca-Nuevo gravity with cosmological observations. The former is a non-linear theory involving a massive spin-1 field, that can be extended incorporating operators of the Generalized Proca class, and when coupled to gravity it can be covariantized in a way that exhibits consistent and ghost-free cosmological solutions, without experiencing instabilities and superluminalities at
-
Induced gravitational waves and baryon asymmetry fluctuations from primordial black hole formation J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 Chiara Altavista, Julián Rey
We consider black hole formation due to the gravitational collapse produced by large density fluctuations during an epoch of reheating with a stiff equation of state and calculate the induced gravitational wave spectrum. By considering the existing bounds on the total energy density of gravitational waves today, we find constraints on the parameter space of this scenario. We also calculate the lepton
-
Numerical 1-loop correction from a potential yielding ultra-slow-roll dynamics J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 Matthew W. Davies, Laura Iacconi, David J. Mulryne
Single-field models of inflation might lead to amplified scalar fluctuations on small scales due, for example, to a transient ultra-slow-roll phase. It was argued by Kristiano & Yokoyama in ref. [1] that the enhanced amplitude of the scalar power spectrum on small scales has the potential to induce a sizeable 1-loop correction to the spectrum at large scales. In this work, we repeat the calculation
-
Relic neutrino decay solution to the excess radio background J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 P.S. Bhupal Dev, Pasquale Di Bari, Ivan Martínez-Soler, Rishav Roshan
The excess radio background detected by ARCADE 2 represents a puzzle within the standard cosmological model. There is no clear viable astrophysical solution, and therefore, it might indicate the presence of new physics. Radiative decays of a relic neutrino ν_i (either i=1, or i=2, or i=3) into a sterile neutrino ν_ s, assumed to be quasi-degenerate, provide a solution that currently evades all constraints
-
Primordial Black hole formation from overlapping cosmological fluctuations J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 Albert Escrivà, Chul-Moon Yoo
We consider the formation of primordial black holes (PBHs), during the radiation-dominated Universe, generated from the collapse of super-horizon curvature fluctuations that are overlapped with others on larger scales. Using a set of different curvature profiles, we show that the threshold for PBH formation (defined as the critical peak of the compaction function) can be decreased by several percentages
-
A cosmological sandwiched window for lepton-number breaking scale J. Cosmol. Astropart. Phys. (IF 6.4) Pub Date : 2024-04-16 Shao-Ping Li, Bingrong Yu
A singlet majoron can arise from the seesaw framework as a pseudo-Goldstone boson when the heavy Majorana neutrinos acquire masses via the spontaneous breaking of global U(1) L symmetry. The resulting cosmological impacts are usually derived from the effective majoron-neutrino interaction, and the majoron abundance is accumulated through the freeze-in neutrino coalescence. However, a primordial majoron
-
Developing an Automated Detection, Tracking, and Analysis Method for Solar Filaments Observed by CHASE via Machine Learning Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Z. Zheng, Q. Hao, Y. Qiu, J. Hong, C. Li, M. D. Ding
Studies on the dynamics of solar filaments have significant implications for understanding their formation, evolution, and eruption, which are of great importance for space weather warning and forecasting. The Hα Imaging Spectrograph (HIS) on board the recently launched Chinese Hα Solar Explorer (CHASE) can provide full-disk solar Hα spectroscopic observations, which bring us an opportunity to systematically
-
On the Origin of the Sudden Heliospheric Open Magnetic Flux Enhancement During the 2014 Pole Reversal Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Stephan G. Heinemann, Mathew J. Owens, Manuela Temmer, James A. Turtle, Charles N. Arge, Carl J. Henney, Jens Pomoell, Eleanna Asvestari, Jon A. Linker, Cooper Downs, Ronald M. Caplan, Stefan J. Hofmeister, Camilla Scolini, Rui F. Pinto, Maria S. Madjarska
Coronal holes are recognized as the primary sources of heliospheric open magnetic flux (OMF). However, a noticeable gap exists between in situ measured OMF and that derived from remote-sensing observations of the Sun. In this study, we investigate the OMF evolution and its connection to solar structures throughout 2014, with special emphasis on the period from September to October, where a sudden and
-
The Origin of Kinematically Persistent Planes of Satellites as Driven by the Early Evolution of the Cosmic Web in ΛCDM Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Matías Gámez-Marín, Isabel Santos-Santos, Rosa Domínguez-Tenreiro, Susana E. Pedrosa, Patricia B. Tissera, M. Ángeles Gómez-Flechoso, Héctor Artal
Kinematically persistent planes (KPPs) of satellites are fixed sets of satellites co-orbiting around their host galaxy, whose orbital poles are conserved and clustered across long cosmic time intervals. They play the role of “skeletons,” ensuring the long-term durability of positional planes. We explore the physical processes behind their formation in terms of the dynamics of the local cosmic web (CW)
-
Secondary Whistler and Ion-cyclotron Instabilities Driven by Mirror Modes in Galaxy Clusters Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Francisco Ley, Ellen G. Zweibel, Drake Miller, Mario Riquelme
Electron cyclotron waves (whistlers) are commonly observed in plasmas near Earth and the solar wind. In the presence of nonlinear mirror modes, bursts of whistlers, usually called lion roars, have been observed within low magnetic field regions associated with these modes. In the intracluster medium (ICM) of galaxy clusters, the excitation of the mirror instability is expected, but it is not yet clear
-
Interstellar Detection of O-protonated Carbonyl Sulfide, HOCS+ Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Miguel Sanz-Novo, Víctor M. Rivilla, Izaskun Jiménez-Serra, Jesús Martín-Pintado, Laura Colzi, Shaoshan Zeng, Andrés Megías, Álvaro López-Gallifa, Antonio Martínez-Henares, Sarah Massalkhi, Belén Tercero, Pablo de Vicente, David San Andrés, Sergio Martín, Miguel A. Requena-Torres
We present the first detection in space of O-protonated carbonyl sulfide (HOCS+), in the midst of an ultradeep molecular line survey toward the G+0.693-0.027 molecular cloud. From the observation of all K a = 0 transitions ranging from J lo = 2 to J lo = 13 of HOCS+ covered by our survey, we derive a column density of N = (9 ± 2) × 1012 cm−2, translating into a fractional abundance relative to H2 of
-
[O iv]- and [Ne v]-weak Active Galactic Nuclei Hidden by Compton-thick Material in Late Mergers Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Satoshi Yamada, Yoshihiro Ueda, Taiki Kawamuro, Claudio Ricci, Yoshiki Toba, Masatoshi Imanishi, Takamitsu Miyaji, Atsushi Tanimoto, Kohei Ichikawa, Martín Herrera-Endoqui, Shoji Ogawa, Ryosuke Uematsu, Keiichi Wada
We study “buried” active galactic nuclei (AGNs) almost fully covered by circumnuclear material in ultra/luminous infrared galaxies (U/LIRGs), which show weak ionized lines from narrow-line regions. Employing an indicator of a [O iv] 25.89 or [Ne v] 14.32 μm line to 12 μm AGN luminosity ratio, we find 17 buried AGN candidates that are [O iv]-weak (L [O IV]/L 12,AGN ≤ −3.0) or [Ne v]-weak (L [Ne V]/L
-
Fast Outflows and Luminous He ii Emission in Dwarf Galaxies with Active Galactic Nuclei (AGN) Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Weizhe Liu, Sylvain Veilleux, Gabriela Canalizo, Todd M. Tripp, David S. N. Rupke, Archana Aravindan, Thomas Bohn, Fred Hamann, Christina M. Manzano-King
While stellar processes are believed to be the main source of feedback in dwarf galaxies, the accumulating discoveries of active galactic nuclei (AGN) in dwarf galaxies over recent years arouse the interest to also consider AGN feedback in them. Fast, AGN-driven outflows, a major mechanism of AGN feedback, have indeed been discovered in dwarf galaxies and may be powerful enough to provide feedback
-
Ultra-relativistic Electron Acceleration during High-intensity Long-duration Continuous Auroral Electrojet Activity Events Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Rajkumar Hajra, Bruce T. Tsurutani, Quanming Lu, Gurbax S. Lakhina, Aimin Du, Ezequiel Echer, Adriane M. S. Franco, Mauricio J. A. Bolzan, Xinliang Gao
Magnetospheric relativistic electrons are accelerated during substorms and strong convection events that occur during high-intensity long-duration continuous auroral electrojet activity (HILDCAA) events, associated with solar wind high-speed streams (coming from coronal holes). From an analysis of ∼2–20 MeV electrons at L ∼ 2–7 measured by the Van Allen Probe satellite, it is shown that ∼3.4–4.1 days
-
Astrometric Microlensing by Primordial Black Holes with the Roman Space Telescope Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 James Fardeen, Peter McGill, Scott E. Perkins, William A. Dawson, Natasha S. Abrams, Jessica R. Lu, Ming-Feng Ho, Simeon Bird
Primordial black holes (PBHs) could explain some fraction of dark matter and shed light on many areas of early-Universe physics. Despite over half a century of research interest, a PBH population has so far eluded detection. The most competitive constraints on the fraction of dark matter comprised of PBHs (f DM) in the (10−9–10)M ⊙ mass ranges come from photometric microlensing and bound f DM ≲ 10−2–10−1
-
The Cosmic Ultraviolet Baryon Survey (CUBS). VIII. Group Environment of the Most Luminous Quasars at z ≈ 1 Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Jennifer I-Hsiu Li, Sean D. Johnson, Erin Boettcher, Sebastiano Cantalupo, Hsiao-Wen Chen, Mandy C. Chen, David R. DePalma, Zhuoqi (Will) Liu, Nishant Mishra, Patrick Petitjean, Zhijie Qu, Gwen C. Rudie, Joop Schaye, Fakhri S. Zahedy
We investigate the group-scale environment of 15 luminous quasars (luminosity L 3000 > 1046 erg s−1) from the Cosmic Ultraviolet Baryon Survey (CUBS) at redshift z ≈ 1. Using the Multi Unit Spectroscopic Explorer integral field spectrograph on the Very Large Telescope, we conduct a deep galaxy redshift survey in the CUBS quasar fields to identify group members and measure the physical properties of
-
The Carbon Isotopic Ratio and Planet Formation Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Edwin A. Bergin, Arthur Bosman, Richard Teague, Jenny Calahan, Karen Willacy, L. Ilsedore Cleeves, Kamber Schwarz, Ke Zhang, Simon Bruderer
We present the first detection of 13CCH in a protoplanetary disk (TW Hya). Using observations of C2H, we measure CCH/13CCH = 65 ± 20 gas with a CO isotopic ratio of 12CO/13CO = 21 ± 5. The TW Hya disk exhibits a gas phase C/O that exceeds unity, and C2H is the tracer of this excess carbon. We confirm that the TW Hya gaseous disk exhibits two separate carbon isotopic reservoirs, as noted previously
-
Spatial Distribution of Intracluster Light versus Dark Matter in Horizon Run 5 Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Jaewon Yoo, Changbom Park, Cristiano G. Sabiu, Ankit Singh, Jongwan Ko, Jaehyun Lee, Christophe Pichon, M. James Jee, Brad K. Gibson, Owain Snaith, Juhan Kim, Jihye Shin, Yonghwi Kim, Hyowon Kim
One intriguing approach for studying the dynamical evolution of galaxy clusters is to compare the spatial distributions among various components such as dark matter, member galaxies, gas, and intracluster light (ICL). Utilizing the recently introduced weighted overlap coefficient (WOC), we analyze the spatial distributions of components within 174 galaxy clusters (M tot > 5 × 1013 M ⊙, z = 0.625) at
-
Detecting Gravitational Wave Bursts from Stellar-mass Binaries in the mHz Band Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Zeyuan Xuan, Smadar Naoz, Bence Kocsis, Erez Michaely
The dynamical formation channels of gravitational wave (GW) sources typically involve a stage when the compact object binary source interacts with the environment, which may excite its eccentricity, yielding efficient GW emission. For the wide eccentric compact object binaries, the GW emission happens mostly near the pericenter passage, creating a unique, burst-like signature in the waveform. This
-
Low-mass Population III Star Formation due to the HD Cooling Induced by Weak Lyman–Werner Radiation Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Sho Nishijima, Shingo Hirano, Hideyuki Umeda
Lyman–Werner (LW) radiation photodissociating molecular hydrogen (H2) influences the thermal and dynamical evolution of the Population III (Pop III) star-forming gas cloud. The effect of powerful LW radiation has been well investigated in the context of supermassive black hole formation in the early Universe. However, the average intensity in the early Universe is several orders of magnitude lower
-
Investigating Ionization in the Intergalactic Medium Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Brad Koplitz, Anjali Ramesh, Sanchayeeta Borthakur
The intergalactic medium (IGM) contains >50% of the baryonic mass of the Universe, yet the mechanisms responsible for keeping the IGM ionized have not been fully explained. Hence, we investigate ion abundances from the largest blind QSO absorption catalog for clouds that show C iv, N v, and O vi simultaneously. The wavelength range of present UV spectrographs, however, makes it possible to probe C
-
Investigation of Profile Shifting and Subpulse Movement in PSR J0344-0901 with FAST Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 H. M. Tedila, R. Yuen, N. Wang, D. Li, Z. G. Wen, W. M. Yan, J. P. Yuan, X. H. Han, P. Wang, W. W. Zhu, S. J. Dang, S. Q. Wang, J. T. Xie, Q. D. Wu, Sh. Khasanov, FAST Collaboration
We report two phenomena detected in PSR J0344−0901 from two observations conducted at frequencies centered at 1.25 GHz using the Five-hundred-meter Aperture Spherical Radio Telescope. The first phenomenon manifests as the pulse emission shifting to later longitudinal phases and then gradually returning to its original location. The event lasts for about 216 pulse periods, with an average shift of about
-
Investigation of Nonequilibrium Ionization Plasma during a Giant Flare of UX Arietis Triggered with MAXI and Observed with NICER Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Miki Kurihara, Wataru Buz Iwakiri, Masahiro Tsujimoto, Ken Ebisawa, Shin Toriumi, Shinsuke Imada, Yohko Tsuboi, Kazuki Usui, Keith C. Gendreau, Zaven Arzoumanian
We detected a giant X-ray flare from the RS CVn–type binary star UX Ari using the Monitor of All-sky X-ray Image on 2020 August 17 and started a series of Neutron star Interior Composition Explorer observations 89 minutes later. For a week, the entire duration of the flare was covered with 32 snapshot observations including the rising phase. The X-ray luminosity reached 2 × 1033 erg s−1, and the entire
-
Observation of Kinetic Alfvén Waves inside an Interplanetary Coronal Mass Ejection Magnetic Cloud at 1 au Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Kishor Kumbhar, Anil Raghav, Omkar Dhamane, Kalpesh Ghag, Vinit Pawaskar, Zubair Shaikh, Ankush Bhaskar, Raffaella D’Amicis, Daniele Telloni
Recent advancements have significantly enhanced our grasp of interplanetary coronal mass ejections (ICMEs) in the heliosphere. These observations have uncovered complex kinematics and structural deformations in ICMEs, hinting at the possible generation of magnetohydrodynamic (MHD) and kinetic-scale waves. While MHD-scale waves in magnetic clouds have been explored, understanding the dynamics of kinetic-scale
-
The Slipping Magnetic Reconnection and Damped Quasiperiodic Pulsations in a Circular Ribbon Flare Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Jing Huang, Baolin Tan, Yin Zhang, Xiaoshuai Zhu, Shangbin Yang, Yuanyong Deng
The study of circular ribbon (CR) flares is important to understand the three-dimensional magnetic reconnection in the solar atmosphere. We investigate the slipping brightenings and damped quasiperiodic pulsations in a CR flare by multiwavelength observations. During the flaring process, two extreme ultraviolet brightenings (SP1 and SP2) slip synchronously along the ribbon in a counterclockwise direction
-
Radio Polarization of Millisecond Pulsars with Multipolar Magnetic Fields Astrophys. J. (IF 4.9) Pub Date : 2024-04-16 Ankan Sur, Yajie Yuan, Alexander Philippov
NICER has observed a few millisecond pulsars where the geometry of the X-ray-emitting hotspots on the neutron star have been analyzed in order to constrain the mass and radius from X-ray light-curve modeling. One example, PSR J0030 + 0451, has been shown to possibly have significant multipolar magnetic fields at the stellar surface. Using force-free simulations of the magnetosphere structure, it has