Over half of the far-infrared background light comes from galaxies at z >= 1.2

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dc.creatorDevlin, Mark J.
dc.creatorAde, Peter A. R.
dc.creatorAretxaga, Itziar
dc.creatorBock, James J.
dc.creatorChapin, Edward L.
dc.creatorGriffin, Matthew
dc.creatorGundersen, Joshua O.
dc.creatorHalpern, Mark
dc.creatorHargrave, Peter C.
dc.creatorHughes, David H.
dc.creatorKlein, Jeff
dc.creatorMarsden, Gaelen
dc.creatorMartin, Peter G.
dc.creatorMauskopf, Philip
dc.creatorMoncelsi, Lorenzo
dc.creatorNetterfield, Calvin B.
dc.creatorNgo, Henry
dc.creatorOlmi, Luca
dc.creatorPascale, Enzo
dc.creatorPatanchon, Guillaume
dc.creatorRex, Marie
dc.creatorScott, Douglas
dc.creatorSemisch, Christopher
dc.creatorThomas, Nicholas
dc.creatorTruch, Matthew D. P.
dc.creatorTucker, Carole
dc.creatorTucker, Gregory S.
dc.creatorViero, Marco P.
dc.creatorWiebe, Donald V.
dc.date2009-04-08
dc.date2009-05-21
dc.date.accessioned2026-07-07T13:16:42Z
dc.date.available2026-07-07T13:16:42Z
dc.descriptionSubmillimetre surveys during the past decade have discovered a population of luminous, high-redshift, dusty starburst galaxies. In the redshift range 1 <= z <= 4, these massive submillimetre galaxies go through a phase characterized by optically obscured star formation at rates several hundred times that in the local Universe. Half of the starlight from this highly energetic process is absorbed and thermally re-radiated by clouds of dust at temperatures near 30 K with spectral energy distributions peaking at 100 microns in the rest frame. At 1 <= z <= 4, the peak is redshifted to wavelengths between 200 and 500 microns. The cumulative effect of these galaxies is to yield extragalactic optical and far-infrared backgrounds with approximately equal energy densities. Since the initial detection of the far-infrared background (FIRB), higher-resolution experiments have sought to decompose this integrated radiation into the contributions from individual galaxies. Here we report the results of an extragalactic survey at 250, 350 and 500 microns. Combining our results at 500 microns with those at 24 microns, we determine that all of the FIRB comes from individual galaxies, with galaxies at z >= 1.2 accounting for 70 per cent of it. As expected, at the longest wavelengths the signal is dominated by ultraluminous galaxies at z > 1.
dc.descriptionAccepted to Nature. Maps available at http://blastexperiment.info/
dc.identifierhttps://arxiv.org/abs/0904.1201
dc.identifierhttp://arxiv.org/abs/0904.1201
dc.identifierNature, vol. 458, 737-739 (2009)
dc.identifierdoi:10.1038/nature07918
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230874
dc.subjectCosmology and Nongalactic Astrophysics
dc.titleOver half of the far-infrared background light comes from galaxies at z >= 1.2
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