AN EMPIRICAL DETERMINATION OF THE INTERGALACTIC BACKGROUND LIGHT USING NEAR-INFRARED DEEP GALAXY SURVEY DATA OUT TO 5[mu]m AND THE GAMMA-RAY OPACITY OF THE UNIVERSE

We extend our previous model-independent determination of the intergalactic background light, based purely on galaxy survey data, out to a wavelength of 5 [mu]m. Our approach enables us to constrain the range of photon densities, based on the uncertainties from observationally determined luminosity...

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Veröffentlicht in:	The Astrophysical journal 2014-04, Vol.784 (2), p.1-6
Hauptverfasser:	Scully, Sean T, Malkan, Matthew A, Stecker, Floyd W
Format:	Artikel
Sprache:	eng
Schlagworte:	Confidence Density Luminosity Opacity Red shift Telescopes Universe Wavelengths
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description	We extend our previous model-independent determination of the intergalactic background light, based purely on galaxy survey data, out to a wavelength of 5 [mu]m. Our approach enables us to constrain the range of photon densities, based on the uncertainties from observationally determined luminosity densities and colors. We further determine a 68% confidence upper and lower limit on the opacity of the universe to [gamma]-rays up to energies of 1.6/(1 + z) TeV. A comparison of our lower limit redshift-dependent opacity curves to the opacity limits derived from the results of both ground-based air Cerenkov telescope and Fermi-LAT observations of PKS 1424+240 allows us to place a new upper limit on the redshift of this source, independent of IBL modeling.
doi_str_mv	10.1088/0004-637X/784/2/138
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subjects	Confidence Density Luminosity Opacity Red shift Telescopes Universe Wavelengths
title	AN EMPIRICAL DETERMINATION OF THE INTERGALACTIC BACKGROUND LIGHT USING NEAR-INFRARED DEEP GALAXY SURVEY DATA OUT TO 5[mu]m AND THE GAMMA-RAY OPACITY OF THE UNIVERSE
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