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AN EMPIRICAL DETERMINATION OF THE INTERGALACTIC BACKGROUND LIGHT FROM UV TO FIR WAVELENGTHS USING FIR DEEP GALAXY SURVEYS AND THE GAMMA-RAY OPACITY OF THE UNIVERSE

Stecker, Floyd W. ; Scully, Sean T. ; Malkan, Matthew A.

The Astrophysical journal, 2016-08, Vol.827 (1), p.6-6 [Periódico revisado por pares]

United States: The American Astronomical Society

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Título:
AN EMPIRICAL DETERMINATION OF THE INTERGALACTIC BACKGROUND LIGHT FROM UV TO FIR WAVELENGTHS USING FIR DEEP GALAXY SURVEYS AND THE GAMMA-RAY OPACITY OF THE UNIVERSE
Autor: Stecker, Floyd W. ; Scully, Sean T. ; Malkan, Matthew A.
Assuntos: ABSORPTION SPECTRA ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; CHERENKOV COUNTERS ; DENSITY ; diffuse radiation ; ELECTROMAGNETIC RADIATION ; FAR ULTRAVIOLET RADIATION ; GALAXIES ; galaxies: luminosity function, mass function ; GAMMA RADIATION ; GAMMA SPECTRA ; INTERGALACTIC SPACE ; LUMINOSITY ; MASS ; OPACITY ; PAIR PRODUCTION ; PEV RANGE ; Photon density ; PHOTONS ; RED SHIFT ; SPACE ; Spectra ; Sun: infrared ; TELESCOPES ; UNIVERSE ; WAVELENGTHS
É parte de: The Astrophysical journal, 2016-08, Vol.827 (1), p.6-6
Notas: AAS00845
High-Energy Phenomena and Fundamental Physics
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: ABSTRACT We have previously calculated the intergalactic background light (IBL) as a function of redshift from the Lyman limit in the far-ultraviolet to a wavelength of 5 m in the near-infrared range, based purely on data from deep galaxy surveys. Here, we use similar methods to determine the mid- and far-infrared IBL from 5 to 850 m. Our approach enables us to constrain the range of photon densities by determining the uncertainties in observationally determined luminosity densities and spectral gradients. By also including the effect of the 2.7 K cosmic background photons, we determine upper and lower limits on the opacity of the universe to γ-rays up to PeV energies within a 68% confidence band. Our direct results on the IBL are consistent with those from complimentary γ-ray analyses using observations from the Fermi γ-ray space telescope and the H.E.S.S. air erenkov telescope. Thus, we find no evidence of previously suggested processes for the modification of γ-ray spectra other than that of absorption by pair production alone.
Editor: United States: The American Astronomical Society
Idioma: Inglês

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AN EMPIRICAL DETERMINATION OF THE INTERGALACTIC BACKGROUND LIGHT FROM UV TO FIR WAVELENGTHS USING FIR DEEP GALAXY SURVEYS AND THE GAMMA-RAY OPACITY OF THE UNIVERSE

Stecker, Floyd W. ; Scully, Sean T. ; Malkan, Matthew A.

United States: The American Astronomical Society

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