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Constraints on the optical-IR extragalactic background from γ-ray absorption studies
Published online by Cambridge University Press: 17 August 2012
Abstract
Very high energy (VHE ≳0.1 TeV) gamma-rays from extragalactic sources, interacting by γ-γ collisions with diffuse intergalactic radiation fields, provide an alternative way to constrain the diffuse background light, completely independent of direct measurements. The limits depend however on our knowledge of the physics of the gamma-ray sources. After clarifying the interplay between background light and VHE spectra, I summarize the extent and validity of the obtainable limits, and where future improvements can be expected.
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- Type
- Contributed Papers
- Information
- Proceedings of the International Astronomical Union , Volume 7 , Symposium S284: The Spectral Energy Distribution of Galaxies , September 2011 , pp. 420 - 428
- Copyright
- Copyright © International Astronomical Union 2012
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