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Star Formation in the Elliptical (?) Galaxy NGC 5173

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Abstract—Using the MaNGaL tunable-filter photometer at the 2.5-m telescope of the Caucasian Mountain Observatory of the Sternberg Astronomical Institute of Lomonosov Moscow State University, we studied star formation in an early-type gas-rich galaxy, which was until now considered to be elliptical,—NGC 5173. The gas has probably been accreted in the recent past by the galaxy from a direction inclined to its disk. Star formation that we observe now has led in the past 400 Myr to the formation of compact massive clusters with shock excitation of gas around them—a star formation behavior corresponding to what is usually observed in the interacting Antennae-like galaxies. In combination with the almost solar metallicity of the gas, this allows us to conclude that NGC 5173 has assimilate a very gas-rich companion with a mass of at least 10–20% of its own stellar mass.

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

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

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ACKNOWLEDGMENTS

We express our gratitude to the anonymous referee, whose attentive reading of the paper made it possible to significantly improve the presentation of our results. In our work we used the data of the NED Extragalactic Database (NASA/IPAC), which is operated by the Jet Propulsion Laboratory and California Institute of Technology under contract with NASA. Our results are based on the Hubble Space Telescope public data taken from the Hubble Legacy Archive (collaboration of the Telescope Science Institute, the Space Telescope European Coordinating Facility and Canadian Astronomy Data Centre), and data from the GALEX space telescope (NASA Galaxy Evolution Explorer), operated by the California Institute of Technology under contract with NASA number NAS5-98034. The GALEX data are taken from the MAST public archive (Mikulski Archive for Space Telescopes) which is supported by the NASA Space Office under the grant NNX13AC07G and other grants. We also used the data from the SDSS-III survey. (http://www.sdss3.org/), which is supported by the Alfred P. Sloan Foundation and the Association of Universities.

Funding

We are grateful to the Interdisciplinary Scientific and Educational School of the Moscow State University “Fundamental and Applied space exploration” for the support of our study.

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Authors and Affiliations

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

    O. K. Sil’chenko, I. S. Proshina & A. V. Moiseev

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

    A. V. Moiseev & D. V. Oparin

Authors
  1. O. K. Sil’chenko
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  2. I. S. Proshina
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  3. A. V. Moiseev
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  4. D. V. Oparin
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Correspondence to O. K. Sil’chenko, I. S. Proshina or A. V. Moiseev.

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Translated by A. Potapova

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Sil’chenko, O.K., Proshina, I.S., Moiseev, A.V. et al. Star Formation in the Elliptical (?) Galaxy NGC 5173. Astrophys. Bull. 77, 40–50 (2022). https://doi.org/10.1134/S1990341322010102

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