NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-11-17 T09:53:18 PST
Help | Comment | NED Home

For refcode 1991ApJ...383..524Z:
Retrieve 85 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1991ApJ...383..524Z OPTICAL COLORS OF EARLY-TYPE GALAXIES IN COMPACT GROUPS STEPHEN E. ZEPF Department of Physics and Astronomy, The Johns Hopkins University; and Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 BRADLEY C. WHITMORE Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 AND HAROLD F. LEVISON Orbital Mechanics Department, United States Naval Observatory, Washington, DC 20392 Received 199f February 15; accepted 1991 June 28 ABSTRACT We present UBVRI colors of a sample of 55 elliptical galaxies as well as 21 S0 galaxies in Hickson compact groups. Four of the elliptical galaxies and one of the S0 galaxies in the compact groups are significantly bluer than normal for early-type galaxies of their luminosity. A population of elliptical galaxies with blue optical colors is predicted by standard models of the evolution of galaxies in compact groups because of the favorable conditions for interactions and mergers in these regions. The brightest of the blue elliptical galaxies has an extensive shell system; however, the other two blue elliptical galaxies for which we have sufficient spatial resolution show no unusual morphological features such as tails or shells. In addition to their color, the primary distinguishing feature of the blue elliptical galaxies is their color gradient, as they tend to be bluer in the center than at large radii, which is contrary to the usual trend in elliptical galaxies. Subject headings: galaxies: clustering - galaxies: photometry
Retrieve 85 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home