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BLAST: A Far-Infrared Measurement of the History of Star Formation

Abstract : We use measurements from the Balloon-borne Large Aperture Sub-millimeter Telescope (BLAST) at wavelengths spanning 250 to 500 microns, combined with data from the Spitzer Infrared telescope and ground-based optical surveys in GOODS-S, to determine the average star formation rate of the galaxies that comprise the cosmic infrared background (CIB) radiation from 70 to 500 microns, at redshifts 0 < z < 3. We find that different redshifts are preferentially probed at different wavelengths within this range, with most of the 70 micron background generated at z < ~1 and the 500 micron background generated at z > ~1. The spectral coverage of BLAST and Spitzer in the region of the peak of the background at ~200 microns allows us to directly estimate the mean physical properties (temperature, bolometric luminosity and mass) of the dust in the galaxies responsible for contributing more than 80% of the CIB. By utilizing available redshift information we directly measure the evolution of the far infrared luminosity density and therefore the optically obscured star formation history up to redshift z ~3.
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http://hal.in2p3.fr/in2p3-00376814
Contributor : Simone Lantz <>
Submitted on : Monday, April 20, 2009 - 12:14:34 PM
Last modification on : Wednesday, October 21, 2020 - 4:32:14 PM

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Enzo Pascale, Peter A. R. Ade, James J. Bock, Edward L. Chapin, Mark J. Devlin, et al.. BLAST: A Far-Infrared Measurement of the History of Star Formation. The Astrophysical Journal, American Astronomical Society, 2009, 707, pp.1740-1749. ⟨10.1088/0004-637X/707/2/1740⟩. ⟨in2p3-00376814⟩

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