Mathematics – Logic
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21441606h&link_type=abstract
American Astronomical Society, AAS Meeting #214, #416.06; Bulletin of the American Astronomical Society, Vol. 41, p.683
Mathematics
Logic
Scientific paper
The Great Observatories All-sky LIRG Survey (GOALS) consists of 202 luminous infrared galaxies (LIRGs) selected from the IRAS Revised Bright Galaxy Survey. Although the majority (80%) of GOALS objects show signs of tidal interactions or merger activity, approximately 20% of local LIRGs are morphologically undisturbed disk galaxies. In contrast, surveys of LIRGs at intermediate redshift find approximately a 50%-50% split between apparently non-interacting disk galaxies and interacting/merging systems. In order to probe the nature of LIRGs that are not involved in major mergers, we compare Spitzer observations of the 40 undisturbed disk galaxies in the GOALS sample to the disk galaxies in the Spitzer Infrared Nearby Galaxies Survey (SINGS) which on average are more than an order of magnitude less luminous than LIRGs in the infrared. We report the results of an investigation of possible causes for the enhanced infrared luminosity in LIRG disks compared to the more quiescent disks in SINGS, including the influence of an AGN, specific star formation rate, disk size, morphological type, as well as stellar bars and rings.
Armus Lee
Frayer David
GOALS Team
Howell Justin
Lord Steve
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