Hubble Space Telescope images of Stephan's Quintet: Star cluster formation in a compact group environment

Sarah C. Gallagher, Jane C. Charlton, Sally D. Hunsberger, Dennis Zaritsky, Bradley C. Whitmore

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

Analysis of Hubble Space Telescope Wide Field Planetary Camera 2 images of Stephan's Quintet, Hickson Compact Group 92, yielded 115 candidate star clusters (with V-I < 1.5). Unlike in merger remnants, the cluster candidates in Stephan's Quintet are not clustered in the inner regions of the galaxies; they are spread over the debris and surrounding area. Specifically, these sources are located in the long sweeping tail and spiral arms of NGC 7319, in the tidal debris of NGC 7318B/A, and in the intragroup starburst region north of these galaxies. Analysis of the colors of the clusters indicate several distinct epochs of star formation that appear to trace the complex history of dynamical interactions in this compact group.

Original languageEnglish (US)
Pages (from-to)163-181
Number of pages19
JournalAstronomical Journal
Volume122
Issue number1
DOIs
StatePublished - Jul 1 2001

Keywords

  • Galaxies: individual (NGC 7318A, NGC 7318B, NGC 7319)
  • Galaxies: interactions
  • Galaxies: star clusters
  • Intergalactic medium

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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