Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-02-26
Astron.J. 127 (2004) 3273-3329
Astronomy and Astrophysics
Astrophysics
23 pages, 16 figures.; accepted for publication in AJ; higher-resolution figures available at http://astronomy.nmsu.edu/nicole
Scientific paper
10.1086/420701
A survey of 329 nearby galaxies (redshift z < 0.045) has been conducted to study the distribution of mass and light within spiral galaxies over a range of environments. The 18 observed clusters and groups span a range of richness, density, and X-ray temperature, and are supplemented by a set of 30 isolated field galaxies. Optical spectroscopy taken with the 200-inch Hale Telescope provides separately resolved H-alpha and [NII] major axis rotation curves for the complete set of galaxies, which are analyzed to yield velocity widths and profile shapes, extents and gradients. HI line profiles provide an independent velocity width measurement and a measure of HI gas mass and distribution. I-band images are used to deconvolve profiles into disk and bulge components, to determine global luminosities and ellipticities, and to check morphological classification. These data are combined to form a unified data set ideal for the study of the effects of environment upon galaxy evolution.
Giovanelli Riccardo
Haynes Martha P.
Herter Terry
Vogt Nicole P.
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