Infrared Imaging And SEDs With Spitzer Of Luminous Compact Blue Galaxies At z<1

Type Conference Paper
Names James D. Lowenthal, M. A. Bershady, J. Gallego, R. Guzman, S. Hameed, D. C. Koo
Proceedings Title Bulletin of the American Astronomical Society
Conference Name American Astronomical Society, AAS Meeting #216, #307.02
Volume 41
Date May 1, 2010
Library Catalog NASA ADS
Abstract We present new infrared images and photometry with Spitzer/IRAC + MIPS of over 20 luminous compact blue galaxies (LCBGs), half at z 0 and half at z 0.75. LCBGs are extreme starburst galaxies with strong evolution, providing up to 40% of the observed increase in global star formation rate density between z=0 and z=1. They are important to study as they not only play a vital role in galaxy evolution, but they are also excellent local analogs for distant starburst galaxies, such as Lyman break galaxies at z>3. Almost all of our LCBGs are detected in IRAC, and most are also detected in MIPS 24um. We fit multi-component stellar population synthesis models to the full spectral energy distributions and set new constraints on both the underlying stellar populations in these low-mass, low-metallicity, high specific star formation rate-systems and on the presence of additional star formation hidden from the optical by obscuring dust. We combine the Spitzer data with high-resolution rest-UV and -optical imaging from HST to characterize the spatial distribution of star formation and to assess the incidence of major mergers driving the starbursts.
UW-Madison Astronomy Home