Formation of a Massive Lenticular Galaxy Under the Tidal Interaction with a Group of Dwarf Galaxies
Artikel i vetenskaplig tidskrift, 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

Författare

Jin-Long Xu

Chinese Academy of Sciences

Guizhou University

Ming Zhu

Guizhou University

Chinese Academy of Sciences

Kelley Hess

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium

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 L31

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.3847/2041-8213/ad0cf5

Mer information

Senast uppdaterat

2024-01-10