Computer Science
Scientific paper
Apr 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sptz.prop60116b&link_type=abstract
Spitzer Proposal ID #60116
Computer Science
Scientific paper
The outer disks of galaxies provide a unique environment for studies of disk growth and galaxy formation. Due to the long dynamical timescales in the outer disk, stellar structures such as breaks, truncations, and tidal streams persist over billions of years. Deep imaging of these structures allows us to trace the history of the galaxy's accretion events and evolution, thus providing essential constraints on current models of galaxy formation. Here we are proposing for deep IRAC imaging of the prototypical star-forming galaxy, M83, to conduct a pilot study for a larger survey of the outer disk of nearby galaxies. M83 has a rich set of ancillary data that will allow for a multiwavelength analysis of the stellar populations throughout the outer disk. Existing ACS data will allow for a direct calibration of the observed IR surface brightness to a stellar mass density. Comparison of deep IR and UV integrated light profiles will reveal variations in the stellar populations and provide a unique test case for models of disk growth.
Barnes Kate
Bullock James
Calzetti Daniela
Chandar Rupali
Dalcanton Julianne
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