Central Mg2 indices for early-type galaxies

V. Golev; Ph. Prugniel; F. Simien; M. Longhetti

doi:10.1051/aas:1999232

Free Access

Issue		Astron. Astrophys. Suppl. Ser. Volume 136, Number 3, May I 1999


Page(s)		519 - 524
DOI		https://doi.org/10.1051/aas:1999232
Published online		15 May 1999

Astron. Astrophys. Suppl. Ser. 136, 519-524 (1999)

Central Mg₂ indices for early-type galaxies ^*,^**

V. Golev¹^,2, Ph. Prugniel¹, F. Simien¹ and M. Longhetti³

¹ CRAL-Observatoire de Lyon, CNRS UMR 142, F-69561 St-Genis-Laval Cedex, France
² Department of Astronomy and Astronomical Observatory, University of Sofia, P.O. Box 36, BG-1504 Sofia, Bulgaria
³ Institut d'Astrophysique de Paris, 98 bis boulevard Arago, F-75014 Paris, France

Send offprint request to: Ph. Prugniel

Received: 18 June 1998
Accepted: 1 February 1999

Abstract

We present 210 new measurements of the central absorption line-strength index for 87 early-type galaxies drawn from the Prugniel & Simien (1996) sample. 28 galaxies were not observed before. The results are compared to measurements published previously as available in HYPERCAT, and rescaled to the Lick system. The mean individual internal error on these measurements is $Mathematical equation: $0\mbox{$.\!\!^{\rm m}$}009\pm0\mbox{$.\!\!^{\rm m}$}003$$ and the mean external error is $Mathematical equation: $0\mbox{$.\!\!^{\rm m}$}012\pm0\mbox{$.\!\!^{\rm m}$}002$$ for this series of measurements.

Key words: galaxies: elliptical and lenticular, cD / galaxies: fundamental parameters / galaxies: stellar content

Based on observations collected at the Observatoire de Haute-Provence.

^**

Tables 1, 3 and 4 are available in electronic form from the CDS, Strasbourg (via anonymous ftp to 130.79.128.5). Tables 1 and 3 are available from CDS only.

Tables at the CDS

Central Mg2 indices for early-type galaxies *,**

Central Mg₂ indices for early-type galaxies ^*,^**