Absorption of high energy gamma-rays by low energy intergalactic photons
نویسندگان
چکیده
منابع مشابه
Absorption of High Energy Gamma-rays by Low Energy Intergalactic Photons
Following our previously proposed technique, we have used the recent-ray observations of Mkr421 to place theoretically signiicant constraints on and possible estimates of the intergalactic infrared radiation eld (IIRF). Our 2 upper limits and estimates are consistent with normal galactic IR production by stars and dust. They rule out exotic mechanisms proposed to produce a larger IIRF. We nd po...
متن کاملIntergalactic Extinction of High Energy Gamma-Rays
We discuss the determination of the intergalactic pair-production absorption coefficient as derived by Stecker and De Jager by making use of a new empirically based calculation of the spectral energy distribution of the intergalactic infrared radiation field as given by Malkan and Stecker. We show that the results of the Malkan and Stecker calculation agree well with recent data on the infrared...
متن کاملAbsorption of Very High Energy Gamma-Rays by Intergalactic Infared Radiation: A New Determination
We present a new calculation of the intergalactic γ-ray pair-production absorption coefficient as a function of both energy and redshift. In reexamining this problem, we make use of a new empirially based calculation (as opposed to previous model calculations) of the intergalactic infrared radiation field (IIRF). We find smaller opacities than those given previously (Stecker & De Jager 1997). W...
متن کاملOn the Absorption of High Energy Gamma-rays by Intergalactic Infrared Radiation
We present a new calculation of the intergalactic γ-ray pair-production absorption coefficient as a function of both energy and redshift up to the redshift of 3C279, z = 0.54. In reexamining this problem, we make use of new observational data on the intergalactic infrared radiation field (IIRF), together with recent theoretical models of the galactic spectral energy distributions of the IIRF fr...
متن کاملExtragalactic Absorption of High Energy Gamma-Rays
The pair-production absorption of high-energy -rays by intergalactic low-energy photons is expected to produce a high-energy cuto in the spectra of sources which is a sensitive function of redshift. We rst discuss the expected absorption coe cient as a function of energy and redshift derived by Stecker and De Jager by making use of a new empirically based calculation of the spectral energy dist...
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ژورنال
عنوان ژورنال: Space Science Reviews
سال: 1996
ISSN: 0038-6308,1572-9672
DOI: 10.1007/bf00195048