Kinematics and Origin of Gas in the Disk Galaxy NGC 2655

—The new observational data concerning distribution, excitation, and kinematics of the ionized gas in the giant early-type galaxy NGC 2655 obtained at the 6m telescope of the Special Astrophysical Observatory (SAO RAS) and at the 2.5 m telescope of the Caucasian Mountain Observatory (CMO SAI MSU) ar...

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Bibliographic Details
Published in:Astrophysical bulletin 2022-12, Vol.77 (4), p.397-406
Main Authors: Sil’chenko, O. K., Moiseev, A. V., Gusev, A. S., Kozlova, D. V.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Disk galaxies
Galactic rotation
Galaxy distribution
Kinematics
Physics
Physics and Astronomy
Rotating disks
Small satellites
Stellar evolution
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Summary:—The new observational data concerning distribution, excitation, and kinematics of the ionized gas in the giant early-type galaxy NGC 2655 obtained at the 6m telescope of the Special Astrophysical Observatory (SAO RAS) and at the 2.5 m telescope of the Caucasian Mountain Observatory (CMO SAI MSU) are presented in this work. The joint analysis of these and earlier spectral observations has allowed us to make a conclusion about multiple nature of the gas in NGC 2655. Together with a proper large gaseous disk experiencing regular circular rotation in the equatorial plane of the stellar potential of the galaxy for billions years, we observe also remnants of a merged small satellite having striked the central part of NGC 2655 almost vertically for some 10 million years ago.
ISSN:1990-3413
1990-3421
DOI:10.1134/S1990341322040137