منابع مشابه
Gamma-ray absorption in the microquasar SS433
We discuss the gamma-ray absorption in the inner region of the microquasar SS433. Our investigation includes several contributions to the opacity of this system. They result from the ambient fields generated by the primary star, possibly an A-type supergiant, and a very extended disk around the black hole. We find an important source for gamma-ray absorption in the UV photon field from the exte...
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Gamma-ray emission in the TeV (1012 eV) range has been detected by HESS from two X-ray binaries: PSR B125963 and LS 5039. In both, the early-type star provides large numbers of target photons for pair-production with TeV γ-rays. This results in a modulation of the γ-ray flux as the relative positions of the γ-ray source and companion star change with orbital phase for the observer. The extent t...
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TThis study investigated the water absorption of chitosan, collagen, and chitosan/collagen blend membranes exposed to gamma-ray irradiation. These membranes were produced via the solvent evaporation method. All membranes then underwent irradiation at 15 or 25 kGy gamma-ray doses, while membranes without irradiation were used as controls. After immersing the membranes in distilled water for up t...
متن کاملGamma-ray Absorption at High Redshifts and the Gamma-ray Background
We present results of a calculation of absorption of 10-500 GeV γ-rays at high redshifts (Salamon and Stecker, 1997). This calculation requires the determination of the high redshift evolution of the full spectral energy distribution of the intergalactic photon field. For this, we have primarily followed the recent analysis of Fall, Charlot & Pei. We give our results for the γ-ray opacity as a ...
متن کاملImplications of Cosmological Gamma-Ray Absorption II. Modification of gamma-ray spectra
Bearing on the model for the time-dependent metagalactic radiation field developed in the first paper of this series, we compute the gamma-ray attenuation due to pair production in photon-photon scattering. Emphasis is on the effects of varying the star formation rate and the fraction of UV radiation assumed to escape from the star forming regions, the latter being important mainly for high-red...
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ژورنال
عنوان ژورنال: Studia Geophysica et Geodaetica
سال: 1973
ISSN: 0039-3169,1573-1626
DOI: 10.1007/bf01614031