Stellar Populations of Elliptical Galaxies in Virgo Cluster. I. The Data and Stellar Population Analysis | Zendy

Y. Yamada | Zendy; N. Arimoto | Zendy; A. Vazdekis | Zendy; R. F. Peletier | Zendy

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Stellar Populations of Elliptical Galaxies in Virgo Cluster. I. The Data and Stellar Population Analysis

Author(s) -

Y. Yamada,

N. Arimoto,

A. Vazdekis,

R. F. Peletier

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/498252

Subject(s) - virgo cluster , astrophysics , physics , stellar population , elliptical galaxy , galaxy , metallicity , astronomy , data reduction , population , star formation , statistics , demography , mathematics , sociology

We have determined spectroscopic ages of elliptical galaxies in the Virgocluster using spectra of very high signal-to-noise ratio (S/N/A > 100). Weobserved 8 galaxies with the Subaru Telescope and have combined this samplewith 6 galaxies previously observed with the WHT. To determine their ages wehave used a new method based on the Hgamma_sigma age indicator, which isvirtually independent of the effects of metallicity. Apart from ages we haveestimated abundances of various elements. In this paper we present theobservations, the data reduction and the reliability of the Hgamma_sigmamethod. The results of this investigation are presented in a companion paper(Yamada et al. 2006).Comment: 33 pages, 9 figures, ApJ accepte

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