Where is the Dust and Star Formation in Compact Groups of Galaxies?

Details Where is the Dust and Star Formation in Compact Groups of Galaxies? Where is the Dust and Star Formation in Compact Groups of Galaxies?

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sptz.prop.3596j&link_type=abstract

Spitzer Proposal ID #3596

Computer Science

Scientific paper

Compact groups of galaxies provide a unique environment to study the mechanisms by which star formation occurs amid continuous gravitational encounters. These dense groups host a variety of modes of star formation, and they can provide insight into the role of gas in galaxy evolution. As part of a multi-wavelength effort to study compact groups of galaxies (spanning X-ray to radio wavelengths), we propose Spitzer IRAC and MIPS imaging for a sample of twelve Hickson Compact Groups. The Spitzer observations will provide powerful diagnostics to study the recent and ongoing star formation in these groups, as well as the affect of galaxy interactions on the location of dust in these systems. We will investigate the role of environment in the formation of stars and massive star clusters, the properties of the embedded regions of star formation, the timescales involved in the triggering and propagation of star formation, the relationship between dust and gas, and the transition/relationship between starbursts and AGNs in these dense groups of interacting galaxies. The sample of giant galaxies, starbursts, LINERs, and AGNs is comparable in size and surface brightness sensitivity to the SINGS Legacy Program, which covers a wide range of environments, but does not include compact groups. These observations will ultimately have an impact on our understanding of the assembly of galaxies at high redshift, and on galaxy evolution throughout the universe.

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