Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-03-18
Chin.Phys.Lett. 18 (2001) 1153
Astronomy and Astrophysics
Astrophysics
revised version for publication in Chin. Phys. Lett
Scientific paper
10.1088/0256-307X/18/8/353
Assuming an adiabatic evolution of a gamma-ray burst (GRB) fireball interacting with an external medium, we calculate the hydrodynamics of the fireball with energy injection from a strongly magnetic millisecond pulsar through magnetic dipole radiation, and obtain the light curve of the optical afterglow from the fireball by synchrotron radiation. Results are given both for a homogeneous external medium and for a wind ejected by GRB progenitor. Our calculations are also available in both ultra-relativistic and non-relativistic phases. Furthermore, the observed R-band light curve of GRB{000301C} can be well fitted in our model, which might provide a probe of the properties of GRB progenitors.
Dai Gao Z.
Wang Wenhong
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