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Compact Galaxies with Active Star Formation from the SDSS DR14: Star-Formation Rates Derived from Combinations of Luminosities in Different Wavelength Ranges

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Abstract

Physical characteristics of a large sample of compact galaxies with active star formation from the SDSS DR14 are derived. The sample includes approximately 30 000 compact isolated galaxies with angular diameters <6″. The emission lines Hβ with equivalent widths EW(Hβ) ≥ 1 nm are observed in the spectra of selected galaxies. The stellar masses of compact galaxies are distributed in a wide range from 105M⊙ to 1011M⊙ with a maximum at ~109M⊙. The oxygen abundances for the bulk of compact galaxies are distributed in the range 7.8…8.2 with a maximum at ~8.05. Compact galaxies are characterized with high specific star-formation rates of 10…100 Gyr–1. The SDSS spectroscopic data were supplemented by photometric data in the far- and near-ultraviolet ranges from the GALEX and in the mid-infrared range at 22 μm from the WISE all-sky surveys. The star-formation rate, concisely named “composite” one, was determined using combinations of two out of five observed luminosities: luminosity L(Hα) in the emission line Hα, monochromatic luminosities in the ultraviolet continuum L(FUV), and L(NUV) and in the mid-infrared continuum L(22 μm) as well as the total luminosities in the infrared range L(TIR). “Composite” star formation rates in compact galaxies with active star formation are compared with those determined from the extinction- and spectral aperture-corrected luminosities of galaxies in the hydrogen emission line Hβ. Relations for “composite” star formation rates with different combinations of indicators were obtained, which are mutually consistent and correspond to star-formation rates SFR(Hβ) derived from the luminosities of galaxies in the hydrogen emission line Hβ, corrected for extinction and spectral aperture.

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Funding

I. Izotova carried out work within the framework of the Astronomy and Physics of Space program of Taras Shevchenko National University of Kyiv (project 19BF023-01). The publication uses observational data from the Wide-field Infrared Survey Explorer (WISE), which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. The work used data from the NASA/IPAC Extragalactic Database (NED), which is administered by the Jet Propulsion Laboratory, California Institute of Technology, in a contract with the National Aeronautics and Space Administration.

GALEX is a NASA mission that is administered by the Jet Propulsion Laboratory.

The SDSS-III project (http://www.sdss3.org/) was financially supported by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. SDSS-III is administered by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration, including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, the University of Cambridge, Carnegie Mellon University, the University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley 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, the University of Portsmouth, Princeton University, the Spanish Participation Group, the University of Tokyo, the University of Utah, Vanderbilt University, the University of Virginia, the University of Washington, and Yale University.

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Authors and Affiliations

  1. Taras Shevchenko National University of Kyiv, 01601, Kyiv, Ukraine

    I. Y. Izotova

  2. Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, 03043, Kyiv, Ukraine

    Y. I. Izotov

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  1. I. Y. Izotova
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  2. Y. I. Izotov
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Correspondence to I. Y. Izotova or Y. I. Izotov.

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Translated by E. Seifina

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Izotova, I.Y., Izotov, Y.I. Compact Galaxies with Active Star Formation from the SDSS DR14: Star-Formation Rates Derived from Combinations of Luminosities in Different Wavelength Ranges. Kinemat. Phys. Celest. Bodies 37, 53–63 (2021). https://doi.org/10.3103/S0884591321020033

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