On the kinematic origin of the luminosity-pulse lag relationship in gamma-ray bursts

被引:65
作者
Salmonson, JD [1 ]
机构
[1] Univ Calif Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
关键词
gamma rays : bursts; gamma rays : theory;
D O I
10.1086/317305
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
This Letter presents an interpretation based on gamma-ray burst source kinematics for the relationship found by Norris et al. between peak luminosity and energy-dependent pulse lag. I argue that the correlation should instead be between number luminosity and pulse lag. This interpretation improves the least-squares fit of this correlation for the known bursts by 25% or more. It also suggests a distance estimation scheme. I propose that this relationship is due to the variation in line-of-sight velocity among bursts. This interpretation allows one to speculate on the range of gamma-ray burst expansion velocities or the size of their jet opening angles.
引用
收藏
页码:L115 / L117
页数:3
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