Counter-Rotating Gaseous Disk and Star Formation in the S0 Galaxy NGC 934
- Authors: Sil’chenko O.K.1, Moiseev A.V.2,1, Oparin D.V.2, Zlydneva D.V.1, Kozlova D.V.3
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Affiliations:
- Sternberg Astronomical Institute, Lomonosov Moscow State University
- Special Astrophysical Observatory, Russian Academy of Sciences
- Leibniz-Institut für Astrophysik Potsdam
- Issue: Vol 49, No 5 (2023)
- Pages: 324-334
- Section: Articles
- URL: https://journals.rcsi.science/0320-0108/article/view/137182
- DOI: https://doi.org/10.31857/S0320010823050054
- EDN: https://elibrary.ru/GMSTOB
- ID: 137182
Cite item
Abstract
Using long-slit and panoramic spectroscopy at the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences and by mapping emission lines in a narrow passband of 13 Å with the MaNGaL instrument at the 2.5-m telescope of the Caucasus Mountain Observatory of the Sternberg Astronomical Institute of the Lomonosov Moscow State University, we have investigated the gaseous component of the giant lenticular galaxy NGC 934. The gas kinematics in the galaxy has turned out to disagree completely with the stellar kinematics, suggesting recent accretion of a large amount of cold gas by the galaxy. Weak star formation proceeds in the accreted gas on the periphery of the galaxy, mainly in a ring of radius 26 kpc, which may promise the buildup of a giant low-surface-brightness stellar disk in this early-type galaxy. The gas metallicity in the star formation ring is nearly solar: the accretion source is most likely the swallowing of a massive gas-rich satellite.
Keywords
About the authors
O. K. Sil’chenko
Sternberg Astronomical Institute, Lomonosov Moscow State University
Email: olga@sai.msu.su
119234, Moscow, Russia
A. V. Moiseev
Special Astrophysical Observatory, Russian Academy of Sciences; Sternberg Astronomical Institute, Lomonosov Moscow State University
Email: olga@sai.msu.su
369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia; 119234, Moscow, Russia
D. V. Oparin
Special Astrophysical Observatory, Russian Academy of Sciences
Email: olga@sai.msu.su
369167, Nizhnii Arkhyz, Karachai-Cherkessian Republic, Russia
D. V. Zlydneva
Sternberg Astronomical Institute, Lomonosov Moscow State University
Email: olga@sai.msu.su
119234, Moscow, Russia
D. V. Kozlova
Leibniz-Institut für Astrophysik Potsdam
Author for correspondence.
Email: olga@sai.msu.su
Potsdam, 14482, Germany
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