Relativistic Precessing Jets and Cosmological Gamma-Ray Bursts | Zendy

Eric G. Blackman | Zendy; Insu Yi | Zendy; George B. Field | Zendy

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Relativistic Precessing Jets and Cosmological Gamma-Ray Bursts

Author(s) -

Eric G. Blackman,

Insu Yi,

George B. Field

Publication year - 1996

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 - 10.1086/310403

Subject(s) - physics , precession , astrophysics , neutron star , gamma ray burst , acceleration , jet (fluid) , amplitude , relativistic beaming , collimated light , astrophysical jet , line of sight , astronomy , galaxy , classical mechanics , active galactic nucleus , optics , mechanics , laser

We discuss the possibility that gamma-ray bursts may result from cosmologicalrelativistic blob emitting neutron star jets that precess past the line ofsight. Beaming reduces the energy requirements, so that the jet emission canlast longer than the observed burst duration. One precession mode maintains ashort duration time scale, while a second keeps the beam from returning to theline of sight, consistent with the paucity of repeaters. The long life of theseobjects reduces the number required for production as compared to short livedjets. Blobs can account for the time structure of the bursts. Here we focuslargely on kinematic and time scale considerations of beaming, precession, andblobs--issues which are reasonably independent of the acceleration and jetcollimation mechanisms. We do suggest that large amplitude electro-magneticwaves could be a source of blob acceleration.Comment: 15 pages, plain TeX, accepted to ApJ

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