The Galaxy Luminosity Functions down to M_R=-10 in the Coma Cluster
Abstract
We derived the luminosity function (LF) of dwarf galaxies in the Coma Cluster down to M_R=-10 at three fields located at the center, intermediate, and outskirt. The LF (-19<M_R<-10) shows no significant differences among the three fields. It shows a clear dip at M_R\sim-13, and is composed of two distinct components of different slopes; the bright component with -19<M_R<-13 has a flatter slope than the faint component with -13<M_R<-10 which has a steep slope. The bright component (-19<M_R<-13) consists of mostly red extended galaxies including few blue galaxies whose colors are typical of late-type galaxies. On the other hand, the faint component (-13<M_R<-10) consists of largely PSF-like compact galaxies. We found that both these compact galaxies and some extended galaxies are present in the center while only compact galaxies are seen in the outskirt. In the faint component, the fraction of blue galaxies is larger in the outskirt than in the center. We suggest that the dwarf galaxies in the Coma Cluster, which make up the two components in the LF, are heterogeneous with some different origins.
Cite
@article{arxiv.1205.5366,
title = {The Galaxy Luminosity Functions down to M_R=-10 in the Coma Cluster},
author = {Hitomi Yamanoi and Yutaka Komiyama and Masafumi Yagi and Sadanori Okamura and Masanori Iye and Nobunari Kashikawa and Tadafumi Takata and Hisanori Furusawa and Michitoshi Yoshida},
journal= {arXiv preprint arXiv:1205.5366},
year = {2015}
}
Comments
13 pages, 15 figures, accepted for publication in the Astronomical Journal