Constraining Extragalactic Background Light From TeV Blazars

Abstract

Our goal is to research the upper limits on the extragalactic background light (EBL). The upper limits on the extragalactic background light (EBL), using the Fermi and very high energy (VHE) spectra recently observed in TeV blazars, are presented. We use an assumption that the VHE intrinsic photon index cannot be harder than the Fermi index measured by the Fermi-LAT. Totally, these upper limits on the EBL are compatible with ones given by most of EBL models. However, the models of high EBL density are denied by TeV blazars.

4 pages, 2 figures, accepted by A&A

References in corpus (13)

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• Diffuse Extragalactic Background Radiation
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Cited by in corpus (9)

• Semi-analytic modeling of the EBL and consequences for extragalactic gamma-ray spectra
• Role of line-of-sight cosmic ray interactions in forming the spectra of distant blazars in TeV gamma rays and high-energy neutrinos
• The Firm Redshift Lower Limit of the Most Distant TeV-Detected Blazar PKS 1424+240
• Evidence for a cosmological effect in γ-ray spectra of BL Lacs
• Gamma-rays as probes of the Universe
• Estimation of the Extragalactic Background Light using TeV Observations of BL~Lacs
• Constraints on Extragalactic Background Light using TeV Observations of BL Lacertae objects
• The TeV Blazar Measurement of the Extragalactic Background Light
• Studies of Extragalactic Background Light with TeV BL Lac Objects