Redshift-distance survey of early-type galaxies: Spectroscopic data

G. Wegner, M. Bernardi, C. N.A. Willmer, L. N. Da Costa, M. V. Alonso, P. S. Pellegrini, M. A.G. Maia, O. L. Chaves, C. Rité

Research output: Contribution to journalReview articlepeer-review

101 Scopus citations

Abstract

We present central velocity dispersions and Mg2 line indices for an all-sky sample of ∼1178 elliptical and S0 galaxies, of which 984 had no previous measures. This sample contains the largest set of homogeneous spectroscopic data for a uniform sample of elliptical galaxies in the nearby universe. These galaxies were observed as part of the ENEAR project, designed to study the peculiar motions and internal properties of the local early-type galaxies. Using 523 repeated observations of 317 galaxies obtained during different runs, the data are brought to a common zero point. These multiple observations, taken during the many runs and different instrumental setups employed for this project, are used to derive statistical corrections to the data and are found to be relatively small, typically ≲ 5% of the velocity dispersion and 0.01 mag in the Mg2 line strength. Typical errors are about 8% in velocity dispersion and 0.01 mag in Mg2, in good agreement with values published elsewhere.

Original languageEnglish (US)
Pages (from-to)2268-2280
Number of pages13
JournalAstronomical Journal
Volume126
Issue number5 1775
DOIs
StatePublished - Nov 2003
Externally publishedYes

Keywords

  • Galaxies: distances and redshifts
  • Galaxies: elliptical and lenticular, cD
  • Galaxies: general
  • Large-scale structure of universe
  • Surveys
  • Techniques: spectroscopic

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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