Abstract
We obtained equations for determining the star-formation rate in local compact star-forming galaxies from the SDSS Data Release 16 using luminosities of the forbidden emission lines [O II] λ 372.7 nm, [Ne III] λ 386.8 nm, [O III] λ 495.9 nm, and [O III] λ 500.7 nm and their combinations. The equations are based on the assumption that the star-formation rates, determined from the luminosity of the forbidden lines and Hβ emission lines, are equal. This approach is especially useful because the observation of Hβ emission is not always possible. For example, in galaxies with redshift z > 1, this line goes beyond the optical range, and the [O II] λ 372.7 nm line, the [Ne III] λ 386.8 nm line, or their combination can be used instead. On the other hand, in many studies of faint objects using low-resolution spectra, the Hβ line merges with the stronger [O III] λ 495.9 nm and [O III] λ 500.7 nm lines. In these cases, [O III] lines and their combination can be used to determine the rate of star formation. The resulting equations can be applied to compact star-forming galaxies in a wide range of redshifts.
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Funding
I.Y. Izotova performed the work within the framework of the program “Astronomy and Space Physics” of Taras Shevchenko National University, Kyiv (project no. 22BF023-04).
The study used the NASA/IPAC Extragalactic Database (NED), which is funded by the National Aeronautics and Space Administration and administered by the California Institute of Technology.
The work uses data from the Sloan Digital Sky Survey (SDSS). The SDSS-III project was funded by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III website is http://www.sdss3.org/. SDSS-III is administered through the Astrophysical Research School for Educational Institutes SDSS-III Collaboration, which includes the University of Arizona, Brazilian Participation Group, Brookhaven National Laboratory, the University of Cambridge, Carnegie Mellon University, Florida University, Franchise Party Group, German Training Group, the University of Harvard, Institute of Astrofisica de Canarias, Mitrogane State/Notre Dame/JINA Training Group, Johns Hopkins University, Berkeley Jurisprudence National Laboratory, Max Planck Institute for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, the University of Tokyo, the University of Utah, Vanderbilt University, the University of Virginia, and Yale University.
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Translated by O. Zhukova
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Izotova, I.Y., Izotov, Y.I. Compact Galaxies with Active Star Formation from the SDSS Data Release 16: Star-Formation Rates Based on the Luminosities of Forbidden Emission Lines in the Optical Range. Kinemat. Phys. Celest. Bodies 39, 24–32 (2023). https://doi.org/10.3103/S0884591323010038
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DOI: https://doi.org/10.3103/S0884591323010038