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Gamma-Ray Burst Afterglows with Energy Injection: Homogeneous Versus Wind External Media |
| WANG Wei1,2;DAI Zi-Gao1 |
| 1Department of Astronomy, Nanjing University, Nanjing 210093
2National Astronomical Observatory, Chinese Academy of Sciences, Beijing 100012
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| Cite this article: |
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WANG Wei, DAI Zi-Gao 2001 Chin. Phys. Lett. 18 1153-1155 |
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Abstract Assuming an adiabatic evolution of a gamma-ray burst (GRB)
fireball interacting with an external medium, we calculate the hydrodynamics of the fireball with an 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. The 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 GRB000301C can be well fitted in our model, which might provide a probe of the properties of GRB progenitors.
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| Keywords:
98.70.Rz
97.60.Jd
95.30.Lz
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Published: 01 August 2001
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