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Gas Kinematics in the Magellanic-Type Galaxy NGC 7292

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Abstract

The paper presents results of studying the kinematics of the ionized gas in the galaxy of the Large Magellanic Cloud type NGC 7292 obtained with the 2.5-m telescope of the Caucasian Mountain Observatory (CMO SAI MSU) and the 6-m BTA telescope of the Special Astrophysical Observatory (SAO RAS). Analysis of the velocity fields of the ionized and neutral hydrogen showed that the kinematic center of NGC 7292 located at the center of the bar, northwest of the photometric center of the galaxy (the southeastern end of the bar) previously taken as the center of NGC 7292. In addition to the circular rotation of the gas, the radial motions associated with the bar play a significant role in the kinematics of the disk. The observed perturbations of the gaseous-disk kinematics induced by the ongoing star formation do not exceed those caused by the bar. It is possible that part of the non-circular motions (at the southeastern end of the bar which is the brightest H II region) may be related to the effects of the capture of a dwarf companion or a gaseous cloud.

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Notes

  1. http://ned.ipac.caltech.edu

  2. http://leda.univ-lyon1.fr

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ACKNOWLEDGMENTS

The authors are grateful to the reviewer for valuable and useful comments. We thank E.I. Shablovinskaya and E.A. Malygin, who carried out observations with the 6-m SAO RAS telescope, A.V. Dodin, who did the primary reduction of the long-slit spectroscopy data, and Prerana Biswas, who kindly provided the H I maps obtained with the GWRT telescope. The open data of the HyperLEDA database (http://leda.univ-lyon1.fr) and NASA/IPAC Extragalactic Database (http://ned.ipac.cal-tech.edu) were used in the paper. We used the public data from the Legacy Survey (http://legacysur-vey.org) consisting of three separate and complementary projects: the Dark Energy Camera Legacy Survey (DECaLS; Proposal ID \(\sharp 2014B\)–0\(404\); PIs: David Schlegel and Arjun Dey), the Beijing-Arizona Sky Survey (BASS; NOAO Prop. ID \(\sharp 2015A\)–\(0801\); PIs: Zhou Xu and Xiaohui Fan), and the Mayall z-band Legacy Survey (MzLS; Prop. ID \(\sharp 2016A\)–\(0453\); PI: Arjun Dey). DECaLS, BASS, and MzLS together include the data obtained, respectively, with the Blanco telescope, Cerro Tololo Inter-American Observatory, NSF’s NOIRLab; the Bok telescope, Steward Observatory, University of Arizona; and the Mayall telescope, Kitt Peak National Observatory, NOIRLab. The Project Legacy Survey was honored to receive permission to perform the astronomical research on Iolkam Duág (Kitt Peak), a mountain of special significance to the Tohono Oódham people.

Funding

The spectroscopic observations at the Caucasian Mountain Observatory of SAI MSU and the analysis of the long-slit spectroscopy data were supported by the RFBR grant No. 20-12-00080 and by the Interdisciplinary Scientific and Educational School of the Lomonosov Moscow State University ‘‘Fundamental and Applied Space Research’’. The observed data were partially obtained with the 2.5-m telescope of the Caucasian Mountain Observatory of SAI MSU. The development of the instrumental base of the observatory is carried out with the support of the Development Program of the Lomonosov Moscow State University. Observations with the 6-m SAO RAS telescope are supported by the Ministry of Science and Higher Education of the Russian Federation. The renovation of the instrumental base is carried out within the framework of the ‘‘Science and Universities’’ national project. The analysis of the ionized gas kinematics was carried out within the framework of the state assignment of SAO RAS approved by the Ministry of Science and Higher Education of the Russian Federation.

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Authors and Affiliations

  1. Sternberg Astronomical Institute, Moscow State University, 119234, Moscow, Russia

    A. S. Gusev, A. V. Moiseev & S. G. Zheltoukhov

  2. Special Astrophysical Observatory, Russian Academy of Sciences, 369167, Nizhnii Arkhyz, Russia

    A. V. Moiseev

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  1. A. S. Gusev
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  2. A. V. Moiseev
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  3. S. G. Zheltoukhov
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Correspondence to A. S. Gusev or A. V. Moiseev.

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Gusev, A.S., Moiseev, A.V. & Zheltoukhov, S.G. Gas Kinematics in the Magellanic-Type Galaxy NGC 7292. Astrophys. Bull. 78, 293–303 (2023). https://doi.org/10.1134/S1990341323700104

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