Constraints on the Optical-IR extragalactic background from gamma-ray absorption studies

Дата и время публикации : 2012-04-28T18:10:17Z

Авторы публикации и институты :
Luigi Costamante

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 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)
Первичная категория: astro-ph.HE

Все категории : astro-ph.HE, astro-ph.CO

Краткий обзор статьи: 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.

Category: Physics