Constraints on the Optical-IR extragalactic background from gamma-ray absorption studies
arXiv:1204.6426 · doi:10.1017/S1743921312009568
Abstract
Very high energy (VHE) gamma-rays from extragalactic sources, interacting by gamma-gamma 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.
8 pages, 8 figures. To appear in Proceedings of IAU Symposium No. 284, The Spectral Energy Distribution of Galaxies (SED2011), Preston, UK, 5-9 sep. 2011 (corrected typos and updated affiliations)
References in corpus (11)
- Semi-analytic modeling of the EBL and consequences for extragalactic gamma-ray spectra
- Very-High-Energy Gamma Rays from a Distant Quasar: How Transparent Is the Universe?
- Teraelectronvolt Astronomy
- New constraints on the Mid-IR EBL from the HESS discovery of VHE gamma rays from 1ES 0229+200
- New limits on the density of the extragalactic background light in the optical to the far-infrared from the spectra of all known TeV blazars
- Formation of hard VHE gamma-ray spectra of blazars due to internal photon-photon absorption
- Blazar Gamma-Rays, Shock Acceleration, and the Extragalactic Background Light
- Formation of hard very-high energy spectra of blazars in leptonic models
- Hard TeV spectra of blazars and the constraints to the IR intergalactic background
- The redshift-dependence of gamma-ray absorption in the environments of strong-line AGN
- A low density of the Extragalactic Background Light revealed by the H.E.S.S. spectra of the BLLac objects 1ES 1101-232 and H 2356-309