A Minuet of Galaxies: Hickson Compact Group 87 as Viewed by the Hubble Space Telescope

Details A Minuet of Galaxies: Hickson Compact Group 87 as Viewed by the Hubble Space Telescope A Minuet of Galaxies: Hickson Compact Group 87 as Viewed by the Hubble Space Telescope

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19513604e&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #136.04; Bulletin of the American Astronomical Society, Vol. 32, p.884

Astronomy and Astrophysics

Astronomy

Scientific paper

HCG 87 was selected from 3 visually, and scientifically, intriguing compact groups for HST WFPC2 imaging by members of the public who visited the Hubble Heritage website (http://heritage.stsci.edu) and registered their votes. The HST exposures in four filters (F450W, F555W, F675W and F814W) of the winning target were used to create a color image, released in September 1999 as part of the Hubble Heritage Team's program to provide images for public outreach and education. Along with these data and image, we present a preliminary determination of colors and brightness profiles for the large galaxies in this group. The pair of apparently interacting galaxies each harbour AGN. One is a ``boxy'' spiral with a prominent dust lane and the other a lenticular galaxy. Another group member is a smaller starbursting spiral galaxy. Our goal is to study their stellar populations and examine the influence of active nuclei on star formation histories. In addition, a similar analysis is being performed on all faint, extended objects distributed throughout the group. For those determined to be tidal dwarf galaxies, we plan to appraise the role gravitational instabilities play during their formation. Support for this work was provided by NASA through grant number GO-07632.01-96A from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under the NASA contract NAS5-26555.

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