e+Pair Cascades and Precursors in Gamma‐Ray Bursts | Zendy

P. Mészáros | Zendy; E. RamirezRuiz | Zendy; M. J. Rees | Zendy

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e⁺Pair Cascades and Precursors in Gamma‐Ray Bursts

Author(s) -

P. Mészáros,

E. RamirezRuiz,

M. J. Rees

Publication year - 2001

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 - 10.1086/321404

Subject(s) - physics , positron , luminosity , gamma ray , astrophysics , gamma ray burst , baryon , electron , nuclear physics , galaxy

Gamma-ray burst sources with a high luminosity can produce electron-positronpair cascades in their environment as a result of back-scattering of a seedfraction of their original hard spectrum. The resulting spectral modificationsoffer the possibility of diagnosing not only the compactness parameter of thegamma-ray emitting region but also the baryonic density of the environmentexternal to the burst.Comment: Ap.J. in press; aaspp4, 12 pages, 2 fig

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