2005•arXiv (Cornell University)Open access
The very early optical afterglow of GRBs, revealing the nature of the ejecta
Y. Z. Fan, Bing Zhang, D. M. Wei
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Abstract
We show that if the GRB ejecta itself is magnetized or neutron-rich, the very early afterglow of GRBs is very different from that powered by a pure ion fireball. In the Swift era, with the well monitored early afterglow data, we can potentially diagnose the ejecta composition and reveal the nature of the central GRB engine.
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