Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21344511h&link_type=abstract
American Astronomical Society, AAS Meeting #213, #445.11; Bulletin of the American Astronomical Society, Vol. 41, p.330
Astronomy and Astrophysics
Astronomy
Scientific paper
IRS spectroscopy of galaxies selected to have F24μm > 0.5 mJy and satisfying an IRAC color criterion gives a sample of massive, star-forming galaxies at z /= 1.9. This sample has the highest PAH to total infrared luminosity ratio among all known populations including local starburst galaxies, local ULIRGs, and MIPS 24 μm luminous sources at z 2. This is the first starburst-dominated ULIRG sample at high redshifts with total infrared luminosity directly measured from FIR and millimeter photometry.
With deep 1.4 GHz radio data, we establish the FIR-radio relation for ULIRGs at z 1.9, which is consistent with the local one. This relation confirms the measurement of total infrared luminosities for the sample. Though this is a 24μm-selected sample,
the predicted submillimeter flux densities suggests that this sample is part of a large faint submillimeter galaxy population.
Star formation rates inferred from both 7.7 and 11.3 μm PAH luminosities for this sample are in the range of 200
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