Probing Star Formation Activity in Galaxies at z = 0 - 1.5: A Redshift Survey of Radio Sources in the SIRTF First Look Survey

Details Probing Star Formation Activity in Galaxies at z = 0 - 1.5: A Redshift Survey of Radio Sources in the SIRTF First Look Survey Probing Star Formation Activity in Galaxies at z = 0 - 1.5: A Redshift Survey of Radio Sources in the SIRTF First Look Survey

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.9011m&link_type=abstract

American Astronomical Society Meeting 203, #90.11; Bulletin of the American Astronomical Society, Vol. 35, p.1352

Astronomy and Astrophysics

Astronomy

2

Scientific paper

We have performed a redshift survey of ˜800 radio sources covering the redshift range z = 0 - 1.5 in the Extra-Galactic SIRTF First Look Survey (FLS) field. These sources sample the bright end of the luminosity distribution of star-forming galaxies which will be detected with SIRTF/MIPS at 24 microns. Our goal is to map out the star formation history via radio and FIR luminosities as a function of redshift up to z = 1.5. Based on the FIR-radio correlation, we expect that all the radio sources which are dominated by star formation will have MIPS counterparts. A preliminary AGN/starburst separation is done using our spectral data and will be further refined using SIRTF IR colors. The combination of optical, FIR and radio data will enable us to explore the evolution of the LIRGS and ULIRGS populations over the redshift range where the star formation activity is believed to be increasing rapidly in galaxy surveys. A preliminary investigation based on the radio luminosity distribution suggests that the majority of galaxies in our sample are dominated by star formation. Only a small fraction of our sources are AGNs, including several quasars (one of which is at z = 3.5).

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