Anisotropic inverse Compton scattering in gamma-ray binaries

Details Anisotropic inverse Compton scattering in gamma-ray binaries Anisotropic inverse Compton scattering in gamma-ray binaries

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sf2a.conf..158c&link_type=abstract

SF2A-2007: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics held in Grenoble, France, July

Astronomy and Astrophysics

Astrophysics

Scientific paper

Amongst the 40 TeV sources discovered by HESS and MAGIC experiments, three have been identified as gamma-ray binaries : LS 5039, LS I +61°303 and PSR B1259-63. Because of the relative position of the compact object, the companion star and the observer, the spectrum of very high energy photons emitted by inverse Compton scattering on stellar photons will depend on the orbital phase. We investigate the effect of this anisotropy on the spectra and lightcurves, focusing on LS 5039. The latter is composed of a compact object and a massive O6.5V star in a 3.9 day eccentric orbit. Observations of this binary have been carried out by HESS in 2004-2005 and revealed an orbital modulation in the TeV gamma-ray flux and spectrum.

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