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X-ray flares from dense shells formed in...
Hascoet, R....

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X-ray flares from dense shells formed in gamma-ray burst explosions by Hascoet, R. ( Author )
Lemonjar Open Access
N.A
28-05-2015
Bright X-ray flares are routinely detected by the Swift satellite during the early afterglow of gamma-ray bursts, when the explosion ejecta drives a blast wave into the external medium. We suggest that the flares are produced as the reverse shock propagates into the tail of the ejecta. The ejecta is expected to contain a few dense shells formed at an earlier stage of the explosion. We show an example of how such dense shells form and describe how the reverse shock interacts with them. A new reflected shock is generated in this interaction, which produces a short-lived X-ray flare. The model provides a natural explanation for the main observed features of the X-ray flares --- the fast rise, the steep power-law decline, and the characteristic peak duration \Delta t /t= (0.1-0.3).
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Article
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36.88 KB
English
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MYR 0.01
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https://arxiv.org/abs/1503.08333
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