The Galaxy Luminosity Functions down toM~ -10 in the Hydra I Cluster | Zendy

Hitomi Yamanoi | Zendy; Masayuki Tanaka | Zendy; M. Hamabe | Zendy; Masafumi Yagi | Zendy; Sadanori Okamura | Zendy; Masanori Iye | Zendy; Kazuhiro Shimasaku | Zendy; Mamoru Doi | Zendy; Yutaka Komiyama | Zendy; Hisanori Furusawa | Zendy

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The Galaxy Luminosity Functions down toM~ -10 in the Hydra I Cluster

Author(s) -

Hitomi Yamanoi,

Masayuki Tanaka,

M. Hamabe,

Masafumi Yagi,

Sadanori Okamura,

Masanori Iye,

Kazuhiro Shimasaku,

Mamoru Doi,

Yutaka Komiyama,

Hisanori Furusawa

Publication year - 2007

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/518475

Subject(s) - astrophysics , physics , lernaean hydra , galaxy , galaxy cluster , cluster (spacecraft) , luminosity function , photometry (optics) , astronomy , luminosity , population , stars , geography , demography , archaeology , computer science , programming language , sociology

We study the galaxy population in the central region and a region about 0.6Mpc away from the center of the Hydra I cluster in B- and Rc-bands down toM~-10 using the Subaru Suprime-Cam photometry. We find that the luminosityfunction of the entire population has a slightly steeper slope (alpha~-1.6) inthe range of -20-14) increases in the cluster center as well as brightgalaxies. The Hydra I cluster is dominated by red dwarfs and the luminosityfunction shows a significant upturn at M~-16 as is seen in several other nearbyclusters, but not in the field. This upturn and the variation in the faint-endslope of the luminosity function may be caused by the cluster environment orthe evolution history of individual clusters.Comment: 21 pages, 6 figures, submitted to A

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