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Title:
Stellar Populations of Elliptical Galaxies in Virgo Cluster. I. The Data and Stellar Population Analysis [ Erratum: 2008ApJ...674..612Y ]
Authors:
Yamada, Y.; Arimoto, N.; Vazdekis, A.; Peletier, R. F.
Affiliation:
AA(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; .; School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.), AB(National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan; .), AC(Instituto de Astrofísica de Canarias, Via Lactea, E-38200 La Laguna, Tenerife, Spain.), AD(Kapteyn Astronomical Institute, University of Groningen, Postbus 800, 9700 AV Groningen, Netherlands.)
Publication:
The Astrophysical Journal, Volume 637, Issue 1, pp. 200-213. (ApJ Homepage)
Publication Date:
01/2006
Origin:
UCP
ApJ Keywords:
Galaxies: Elliptical and Lenticular, cD, Galaxies: Evolution, Galaxies: Stellar Content, Techniques: Spectroscopic
DOI:
10.1086/498252
Bibliographic Code:
2006ApJ...637..200Y

Abstract

We have determined spectroscopic ages of elliptical galaxies in the Virgo Cluster using spectra of very high signal-to-noise ratio (S/N>100 Å-1). We observed eight galaxies with the Subaru Telescope and have combined this sample with six galaxies previously observed with the WHT. To determine their ages, we have used a new method based on the Hγσ age indicator, which is virtually independent of the effects of metallicity. Apart from ages we have estimated abundances of various elements. In this paper we present the observations, the data reduction, and the reliability of the Hγσ method. The results of this investigation are presented in a companion paper.

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