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

Appleton, P. N. and Armus, L. and Fadda, D. and Marleau, F. (2006) The IR Properties of Interacting and Merging Galaxies to z = 1.3. In: The Spitzer Space Telescope : new views of the cosmos. ASP Conference Series (357). Astronomical Society of the Pacific , San Francisco, pp. 250-253. ISBN 978-1-583812-25-9 http://resolver.caltech.edu/CaltechAUTHORS:20110128-135621960

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Abstract

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.


Item Type:Book Section
Additional Information:© 2006 Astronomical Society of the Pacific.
Record Number:CaltechAUTHORS:20110128-135621960
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110128-135621960
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21920
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:04 Feb 2011 21:37
Last Modified:24 Apr 2012 22:55

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