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Title: HESS J0632+057: hydrodynamics and non-thermal emission
Author: Bosch i Ramon, Valentí
Barkov, M. V.
Mignone, Andrea
Bordas Coma, Pol
Keywords: Raigs X
Raigs gamma
Estels binaris de raigs X
Gamma rays
X-ray binaries
Issue Date: 2-Aug-2017
Publisher: Royal Astronomical Society
Abstract: HESS J0632+057 is an eccentric gamma-ray Be binary that produces non-thermal radio, Xrays, GeV and very high-energy gamma-rays. The non-thermal emission of HESS J0632+057 is modulated with the orbital period, with a dominant maximum before apastron passage. The nature of the compact object in HESS J0632+057 is not known, although it has been proposed to be a young pulsar as in PSR B1259-63, the only gamma-ray emitting high-mass binary known to host a non-accreting pulsar. In this letter, we present hydrodynamical simulations of HESS J0632+057 in the context of a pulsar and a stellar wind interacting in an eccentric binary, and propose a scenario for the non-thermal phenomenology of the source. In this scenario, the non-thermal activity before and around apastron is linked to the accumulation of non-thermal particles in the vicinity of the binary, and the sudden drop of the emission before apastron is produced by the disruption of the two-wind interaction structure, allowing these particles to escape efficiently. In addition to providing a framework to explain the nonthermal phenomenology of the source, this scenario predicts extended, moving X-ray emitting structures similar to those observed in PSR B1259-63
Note: Reproducció del document publicat a:
It is part of: Monthly Notices of the Royal Astronomical Society, 2017, vol. 471, num. 1, p. L150-L154
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ISSN: 0035-8711
Appears in Collections:Publicacions de projectes de recerca finançats per la UE
Articles publicats en revistes (Física Quàntica i Astrofísica)

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