Gamma rays from accreting matter onto collapsed objects |
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Authors: | S Karakula W Tkaczyk F Giovannelli |
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Abstract: | In the spherical accretion onto massive objects, the matter may be heated up to temperatures as high as 1012 °K. In such a hot plasma, the thermal bremsstrahlung (e-e and e-p) and π° decay from inelastic collisions of protons are the main γ-ray sources. We determined the γ -ray production spectra from the π° decay and from bremsstrahlung for different temperatures. The expected γ-ray spectra were evaluated too in order to fit experimental data. We have fitted COS B data from 3C 273 using a two temperatures plasma model. The best fit is for (M8 is the black hole mass in 108 M) which gives
. The hard X-ray measurements do not contradict the bremsstrahlung spectrum. |
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Keywords: | γ -ray sources γ -rays: general Relativistic plasma Accretion processes Collapsed objects black holes QSOs 3C 273 |
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