Gamma Rays from Compton Scattering in the Jets of Microquasars: Application to LS 5039
نویسندگان
چکیده
منابع مشابه
Gamma Rays from Compton Scattering in the Jets of Microquasars: Application to Ls 5039
Recent High Energy Stereoscopic System (HESS) observations show that microquasars in highmass systems are sources of very high energy γ-rays. A leptonic jet model for microquasar γ-ray emission is developed. Using the head-on approximation for the Compton cross section and taking into account angular effects from the star’s orbital motion, we derive expressions to calculate the spectrum of γ ra...
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Very high energy (VHE) γ-rays have recently been detected from the Galactic black-hole candidate and microquasar LS 5039. A plausible site for the production of these VHE γ-rays is the mildly relativistic outflow close to the base of the jet. However, at distances comparable to the binary separation, the intense photon field of the stellar companion will lead to substantial γγ absorption of VHE...
متن کاملar X iv : a st ro - p h / 05 12 16 2 v 1 6 D ec 2 00 5 Gamma Rays from Compton Scattering in the Jets of Microquasars : Application to LS 5039
Recent High Energy Stereoscopic System (HESS) observations show that microquasars in high-mass systems are sources of very high energy γ-rays. A leptonic jet model for microquasar γ-ray emission is developed. Using the head-on approximation for the Compton cross section and taking into account angular effects from the star’s orbital motion, we derive expressions to calculate the spectrum of γ r...
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The possible associations between the microquasars LS 5039 and LS I +61 303 and the EGRET sources 3EG J1824−1514 and 3EG J0241+6103 suggest that microquasars could also be sources of high-energy γ-rays. In this work, we present a detailed numerical inverse Compton (IC) model, based on a microquasar scenario, that reproduces the high-energy γ-ray spectra and variability observed by EGRET for the...
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We present here new observations conducted with the EVN and MERLIN of the persistent microquasar LS 5039 discovered by Paredes et al. (2000) with the VLBA. The new observations confirm the presence of an asymmetric two-sided jet reaching up to ∼ 1000 AU on the longest jet arm. The results suggest a bending of the jets with increasing distance from the core and/or precession. The origin and loca...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2006
ISSN: 0004-637X,1538-4357
DOI: 10.1086/502966