The IR Properties of Interacting and Merging Galaxies to z = 1.3

Details The IR Properties of Interacting and Merging Galaxies to z = 1.3 The IR Properties of Interacting and Merging Galaxies to z = 1.3

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..357..250a&link_type=abstract

The Spitzer Space Telescope: New Views of the Cosmos ASP Conference Series, Volume 357, proceedings of the conference held 9-12

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Scientific paper

We attempt to understand the role of collisions and mergers on the IR-bright galaxy population since a redshift of ˜1.5, where the median star formation rate is falling the most rapidly. Using over a thousand 24μm sources from the Extragalactic First Look Survey contained with 50 HST/ACS fields, we classify their morphologies using both the CAS automated method, and a subjective ``human inspection'' method. We conclude that out to z = 1.5, both the 24μm luminosity and the 24/6.8μm color is not strongly coupled to CAS morphology or merger state. Dusty AGN, on the other hand, seem both more luminous and more symmetrical than star formation-dominated systems.

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