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Comptes Rendus Physique
Volume 12, n° 3
pages 206-225 (avril 2011)
Doi : 10.1016/j.crhy.2011.03.004
Open questions in GRB physics
Questions ouvertes de la physique des sursauts gamma
 

Bing Zhang
Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154, USA 

Abstract

Open questions in GRB physics are summarized as of 2011, including classification, progenitor, central engine, ejecta composition, energy dissipation and particle acceleration mechanism, radiation mechanism, long term engine activity, external shock afterglow physics, origin of high energy emission, and cosmological setting. Prospects of addressing some of these problems with the upcoming Chinese–French GRB mission, SVOM, are outlined.

The full text of this article is available in PDF format.
Résumé

Cette contribution résume les questions ouvertes de la physique des sursauts gamma, début 2011. La classification, les progéniteurs, le moteur central, la composition de lʼéjecta, la dissipation dʼénergie et les mécanismes dʼaccélération de particules, les processus de rayonnement, lʼactivité prolongée du moteur central, la physique du choc externe lors des rémanences, lʼorigine de lʼémission haute énergie et le contexte cosmologique sont successivement évoqués. Lʼapport attendu de la mission franco-chinoise SVOM à la résolution de certaines de ces questions est ensuite expliqué.

The full text of this article is available in PDF format.

Keywords : Gamma-rays, Stars, Black holes, Neutron stars, Shocks, Magnetic fields, Radiation mechanism

Mots-clés : Sursauts gamma, Étoiles, Trous noirs, Étoiles à neutrons, Chocs, Champs magnétiques, Processus de rayonnement




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