Measurement of the Extragalactic Background Light Spectral Energy Distribution with VERITAS
The extragalactic background light (EBL), a diffuse photon field in the optical and infrared range, is a record of radiative processes over the universe's history. Spectral measurements of blazars at very high energies (>100 GeV) enable the reconstruction of the spectral energy distribution...
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Published in: | The Astrophysical journal Vol. 885; no. 2; pp. 150 - 157 |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Journal Article |
Language: | English |
Published: |
Philadelphia
The American Astronomical Society
10-11-2019
IOP Publishing |
Subjects: | |
Online Access: | Get full text |
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Summary: | The extragalactic background light (EBL), a diffuse photon field in the optical and infrared range, is a record of radiative processes over the universe's history. Spectral measurements of blazars at very high energies (>100 GeV) enable the reconstruction of the spectral energy distribution (SED) of the EBL, as the blazar spectra are modified by redshift- and energy-dependent interactions of the gamma-ray photons with the EBL. The spectra of 14 VERITAS-detected blazars are included in a new measurement of the EBL SED that is independent of EBL SED models. The resulting SED covers an EBL wavelength range of 0.56-56 m, and is in good agreement with lower limits obtained by assuming that the EBL is entirely due to radiation from cataloged galaxies. |
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Bibliography: | Galaxies and Cosmology AAS18654 |
ISSN: | 0004-637X 1538-4357 |
DOI: | 10.3847/1538-4357/ab4817 |