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American Institute of Physics, AIP Conference Proceedings

DOI: 10.1063/1.3149429

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What Can Simbol-X Do for Gamma-ray Binaries?

Journal article published in 2009 by B. Cerutti, G. Dubus ORCID, G. Henri, A. B. Hill ORCID, A. Szostek, Jéro^me Rodriguez, Phillippe Ferrando
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This paper is available in a repository.

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Abstract

Gamma-ray binaries have been uncovered as a new class of Galactic objects in the very high energy sky (> 100 GeV). The three systems known today have hard X-ray spectra (photon index ~ 1.5), extended radio emission and a high luminosity in gamma-rays. Recent monitoring campaigns of LSI +61 303 in X-rays have confirmed variability in these systems and revealed a spectral hardening with increasing flux. In a generic one-zone leptonic model, the cooling of relativistic electrons accounts for the main spectral and temporal features observed at high energy. Persistent hard X-ray emission is expected to extend well beyond 10 keV. We explain how Simbol-X will constrain the existing models in connection with Fermi Space Telescope measurements. Because of its unprecedented sensitivity in hard X-rays, Simbol-X will also play a role in the discovery of new gamma-ray binaries, giving new insights into the evolution of compact binaries. ; Comment: 4 pages, 1 figure, Proceedings of the 2nd International Simbol-X symposium held in Paris, 2-5 December 2008