Corpus ID: 237941133

The role of HI in regulating size growth of local galaxies

  title={The role of HI in regulating size growth of local galaxies},
  author={Zhizheng Pan and Jing Wang and Xianzhong Zheng and Xu Kong},
  • Zhizheng Pan, Jing Wang, +1 author Xu Kong
  • Published 26 September 2021
  • Physics
We study the role of atomic hydrogen (HI) in regulating size growth of local galaxies. The size of a galaxy, Dr, 25, is characterized by the diameter at which the r−band surface brightness reaches μr = 25.0 mag arcsec . We find that the positions of galaxies in the size (Dr, 25)−stellar mass (M∗) plane strongly depend on their HI-tostellar mass ratio (MHI/M∗). In the HI-rich regime, galaxies that are more rich in HI tend to have larger sizes. Such a trend is not seen in the HI-poor regime… Expand


Annales d'Astrophysique
  • Nature
  • 1946
THE French National Centre of Scientific Research announces that, beginning with this year, the Annales d'Astrophysique will be reorganised as an international medium for the publication of articlesExpand