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

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dc.creatorYamanoi, H.
dc.creatorTanaka, M.
dc.creatorHamabe, M.
dc.creatorYagi, M.
dc.creatorOkamura, S.
dc.creatorIye, M.
dc.creatorShimasaku, K.
dc.creatorDoi, M.
dc.creatorKomiyama, Y.
dc.creatorFurusawa, H.
dc.date2007-01-24
dc.date.accessioned2026-07-07T11:21:01Z
dc.date.available2026-07-07T11:21:01Z
dc.descriptionWe study the galaxy population in the central region and a region about 0.6 Mpc away from the center of the Hydra I cluster in B- and Rc-bands down to M~-10 using the Subaru Suprime-Cam photometry. We find that the luminosity function of the entire population has a slightly steeper slope (alpha~-1.6) in the range of -20<M<-10 than those reported for other clusters in slightly brighter ranges. The slope appears to be steeper in poorer clusters. The number of faint galaxies (M>-14) increases in the cluster center as well as bright galaxies. The Hydra I cluster is dominated by red dwarfs and the luminosity function shows a significant upturn at M~-16 as is seen in several other nearby clusters, but not in the field. This upturn and the variation in the faint-end slope of the luminosity function may be caused by the cluster environment or the evolution history of individual clusters.
dc.description21 pages, 6 figures, submitted to AJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0701670
dc.identifierhttp://arxiv.org/abs/astro-ph/0701670
dc.identifierAstron.J.134:56-63,2007
dc.identifierdoi:10.1086/518475
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194142
dc.subjectAstrophysics
dc.titleThe Galaxy Luminosity Functions down to M~-10 in the Hydra I Cluster
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