Time-dependent thermal effects in GRB afterglows

Details Time-dependent thermal effects in GRB afterglows Time-dependent thermal effects in GRB afterglows

2003-08-31

arxiv.org/abs/astro-ph/0309015v2

Nucl.Phys.Proc.Suppl.132:327-330,2004

Astronomy and Astrophysics

Astrophysics

Revised vesrion. Minor changes, typos corected, reference added. To appear in Proc. 2d BeppoSAX Symposium, Eds. E.P.J. van den

Scientific paper

10.1016/j.nuclphysbps.2004.04.05

Time-dependent thermal effects should accompany standard non-thermal afterglows of GRB when gamma-rays pass through inhomogeneous surroundings of the GRB site. Thermal relaxation of an optically thin plasma is calculated using time-dependent collisional ionization of the plasma ion species. X-ray emission lines are similar to those found in the fading X-ray afterglow of GRB 011211. Thermal relaxation of clouds or shells around the GRB site could also contribute to the varying late optical GRB afterglows, such as in GRB021004 and GRB030329.

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