Comptonization models and spectroscopy of X-ray and gamma-ray sources
نویسندگان
چکیده
منابع مشابه
Photospheres, Comptonization and X-ray Lines in Gamma Ray Bursts
Steep X-ray spectral slopes, X-ray excesses and preferred spectral energy breaks in the 01-0.3 MeV range are discussed as the possible consequences of the photospheric component of the GRB relativistic outflow, and of pair breakdown in internal shocks leading to comptonization on semirelativistic electrons or MHD waves. We also discuss the X-ray and UV spectra of GRB afterglows occuring in a de...
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Observational evidence of iron absorption and emission lines in X-ray spectra of Gamma-Ray Bursts is quite compelling. I will briefly review the results, summarize different models and describe the connection with massive progenitors in star-forming regions implied by these results. This link is also supported by measurements of the X-ray absorbing gas in several GRB’s, with column density cons...
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Quasi–thermal Comptonization in internal shocks formed between relativistic shells can account for the high energy emission of gamma–ray bursts. This is in fact the dominant cooling mechanism if the typical energy of the emitting particles is achieved either through the balance between heating and cooling or as a result of electron–positron pair production. Both processes yield sub or mildly re...
متن کاملX-ray afterglows and spectroscopy of Gamma-Ray Bursts
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X-ray flashes are detected in the Wide Field Cameras on BeppoSAX in the energy range 2-25 keV as bright X-ray sources lasting of the order of minutes, but remaining undetected in the Gamma Ray Bursts Monitor on BeppoSAX. They have properties very similar to the x-ray counterparts of GRBs and account for some of the Fast X-ray Transient events seen in almost every x-ray satellite. We review thei...
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ژورنال
عنوان ژورنال: Advances in Space Research
سال: 1997
ISSN: 0273-1177
DOI: 10.1016/s0273-1177(97)00043-4