Formation of a Massive Lenticular Galaxy Under the Tidal Interaction with a Group of Dwarf Galaxies
Journal article, 2023
Based on the atomic-hydrogen (H i) observations using the Five-hundred-meter Aperture Spherical radio Telescope, we present a detailed study of the gas-rich massive S0 galaxy NGC 1023 in a nearby galaxy group. The presence of a H i extended warped disk in NGC 1023 indicates that this S0 galaxy originated from a spiral galaxy. The data also suggest that NGC 1023 is interacting with four dwarf galaxies. In particular, one of the largest dwarf galaxies has fallen into the gas disk of NGC 1023, forming a rare bright-dark galaxy pair with a large gas clump. This clump shows the signature of a galaxy but has no optical counterpart, implying that it is a newly formed starless galaxy. Our results first suggest that a massive S0 galaxy in a galaxy group can form via the morphological transformation from a spiral under the joint action of multiple tidal interactions.
galaxy formation
Author
Jin-Long Xu
Chinese Academy of Sciences
Guizhou University
Ming Zhu
Guizhou University
Chinese Academy of Sciences
Kelley Hess
Chalmers, Space, Earth and Environment, Onsala Space Observatory
Naiping Yu
Guizhou University
Chinese Academy of Sciences
Chuan-Peng Zhang
Guizhou University
Chinese Academy of Sciences
Xiao-Lan Liu
Guizhou University
Chinese Academy of Sciences
Mei Ai
Chinese Academy of Sciences
Guizhou University
Peng Jiang
Chinese Academy of Sciences
Guizhou University
Jie Wang
Chinese Academy of Sciences
Astrophysical Journal Letters
2041-8205 (ISSN) 2041-8213 (eISSN)
Vol. 958 2 L31Subject Categories
Astronomy, Astrophysics and Cosmology
DOI
10.3847/2041-8213/ad0cf5