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Environmental Influence on Star Formation of Galaxies in the LAS Campanas Redshift Survey

Published online by Cambridge University Press:  25 May 2016

Y. Hashimoto  and
A. Oemler
Y. Hashimoto
Affiliation:
Yale/OCIW, Dept. of Astronomy, Yale University, New Haven, CT 06511; Carnegie Obs., 813 Santa Barbara St. Pasadena, CA 91101
A. Oemler
Affiliation:
Yale/OCIW, Dept. of Astronomy, Yale University, New Haven, CT 06511; Carnegie Obs., 813 Santa Barbara St. Pasadena, CA 91101

Extract

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We have used a sample of 15749 galaxies taken from the Las Campanas Redshift Survey to investigate the effects of environment on the rate of star formation (SFR) in galaxies. For each galaxy we measure SFR by [OII] emission, while a concentration index (C) is used to decouple the effect of the “morphology-environment” relation from the SFR. Galactic environment is characterized both by the 3-space local density (ρ) of galaxies and by membership in groups and clusters.

Type
Groups & Clusters
Information
Symposium - International Astronomical Union , Volume 186: Galaxy Interactions at High and Low Redshift , 1999 , pp. 411
Copyright
Copyright © Kluwer 1999