Modeling TeV γ-rays from LS 5039: an active OB star at the extreme
نویسندگان
چکیده
منابع مشابه
High-energy Γ-ray Emission from Microquasars: Ls 5039 and Ls I +61 303
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...
متن کاملSpectral energy distribution of the γ - ray microquasar LS 5039
The microquasar LS 5039 has recently been detected as a source of very high energy (VHE) γ-rays. This detection, that confirms the previously proposed association of LS 5039 with the EGRET source 3EG J1824−1514, makes of LS 5039 a special system with observational data covering nearly all the electromagnetic spectrum. In order to reproduce the observed spectrum of LS 5039, from radio to VHE γ-r...
متن کاملGamma 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...
متن کاملMicroquasar LS 5039: a TeV gamma-ray emitter and a potential TeV neutrino source
The recent detection of TeV γ-rays from the microquasar LS 5039 by HESS is one of the most exciting discoveries of observational gamma-ray astronomy in the very high energy regime. This result clearly demonstrates thatX-ray binaries with relativistic jets (microquasars) are sites of effective acceleration of particles (electrons and/or protons) to multi-TeV energies. Whether the γ-rays are of h...
متن کاملOn the magnetic field and the TeV emitter location in Cygnus X - 1 and LS 5039
Context. Cygnus X-1 and LS 5039 are two X-ray binaries detected at TeV energies. Both sources are compact systems, contain jetlike (radio) structures, and harbor very luminous O stars. The two systems show TeV signal around the superior conjunction of the compact object, when the largest gamma-ray opacities are expected. Aims. We investigate the implications of the TeV detections of Cygnus X-1 ...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2010
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921311011471