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On the Kinematic Origin of the Luminosity-Pulse Lag Relationship in Gamma-ray Bursts

Jay D. Salmonson
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Abstract

This paper 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 percent 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.

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Jay D. Salmonson. 2000-09-23. On the Kinematic Origin of the Luminosity-Pulse Lag Relationship in Gamma-ray Bursts. https://doi.org/10.1086/317305

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