Star formation in Las Campanas compact groups

Sahar S. Allam, Douglas L. Tucker, Huan Lin, Yasuhiro Hashimoto

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    Compact groups (CGs) of galaxies offer an exceptional laboratory for the study of dense galactic environments, where interactions, tidally induced activity, and mergers are expected to be at their highest rate of occurrence. Here we present first results from a new catalog of compact groups, one based on the Las Campanas Redshift Survey (LCRS). Using the equivalent width of [O II] λ3727, we have studied the star formation activity in LCRS CGs: we find strong evidence of depressed star formation in CGs relative to that in loose groups or the field. Although much of this effect can be ascribed to a morphological mix (CGs contain a high fraction of early-type galaxies), there is some evidence that the star formation rate in late-type galaxies is particularly deficient - perhaps only one-half to one-third that of field spiral galaxies. We conclude that gas-stripping mechanisms may play a role in CG environments.

    Original languageEnglish
    Pages (from-to)L89-L92
    JournalAstrophysical Journal
    Volume522
    Issue number2 PART 2
    DOIs
    Publication statusPublished - 1999 Sep 10

    Keywords

    • Catalogs
    • Galaxies: clusters
    • Galaxies: interactions
    • Galaxies: starburst
    • General

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Fingerprint Dive into the research topics of 'Star formation in Las Campanas compact groups'. Together they form a unique fingerprint.

    Cite this