An Upper Limit to the Infra-red Background from Observations of TeV Gamma-Rays

Details An Upper Limit to the Infra-red Background from Observations of TeV Gamma-Rays An Upper Limit to the Infra-red Background from Observations of TeV Gamma-Rays

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...185.5710b&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #57.10; Bulletin of the American Astronomical Society, Vol. 26, p.1410

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Observations of the GeV and TeV gamma-ray spectrum of the active galaxy Markarian 421 are used to derive an upper limit to the energy density of infra-red background radiation. This limit is derived through a consideration of high energy gamma-ray cascading in the presence of such radiation fields. The resulting upper bound proves to be the most restrictive for the wavelength range of 10-12 micrometers. These constraints are presently limited by the uncertainty of extrapolating the source spectrum from 5 to 500 GeV. Observations in the range 50-100 GeV would significantly improve these limits, allowing for a wide range of IR production models to be constrained.

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