On the Evolution of the Apparent Size of Gamma-Ray Burst Remnants
Ting-Ting Gao; Yong-Feng Huang; Ting-Ting Gao; Department of Astronomy, Nanjing University, Nanjing 210093; Yong-Feng Huang; Department of Astronomy, Nanjing University, Nanjing 210093
Журнал:
Chinese Journal of Astronomy and Astrophysics
Дата:
2006-06-01
Аннотация:
The remnants of two gamma-ray bursts, GRB 030329 and GRB 041227, have been resolved by Very Long Baseline Interferometry observations. The radio counterparts were observed to expand with time. These observations provide an important way to test the dynamics of the standard fireball model. We show that the observed size evolution of these two events cannot be explained by a simple jet model, rather, it can be satisfactorily explained by the two-component jet model. It strongly hints that gamma-ray burst ejecta may have complicated structures.
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