On the Kinematic Origin of the Luminosity–Pulse Lag Relationship in Gamma-Ray Bursts | Zendy

J. D. Salmonson | Zendy

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

Author(s) -

J. D. Salmonson

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/317305

Subject(s) - physics , gamma ray burst , lag , luminosity , astrophysics , kinematics , pulse (music) , range (aeronautics) , line of sight , jet (fluid) , interpretation (philosophy) , lag time , optics , mechanics , classical mechanics , galaxy , detector , computer network , materials science , computer science , composite material , biological system , biology , programming language

This paper presents an interpretation based on gamma-ray burst sourcekinematics for the relationship found by Norris et al. between peak luminosityand energy-dependent pulse lag. I argue that the correlation should instead bebetween "number" luminosity and pulse lag. This interpretation improves theleast-squares fit of this correlation for the known bursts by 25 percent ormore. It also suggests a distance estimation scheme. I propose that thisrelationship is due to the variation in line-of-sight velocity among bursts.This interpretation allows one to speculate on the range of gamma-ray burstexpansion velocities or the size of their jet opening angles.Comment: 4 pages, including 1 figure, to appear in ApJ Letters. Final draft incorporating referee's suggestions. Also, section 5 ("Observed Peak Pulse Energy") revised and shortene

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