The IR Properties of Interacting and Merging Galaxies to z = 1.3
2006
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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