X-Ray Afterglows from Gamma-Ray Bursts | Zendy

M. Tavani | Zendy

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X-Ray Afterglows from Gamma-Ray Bursts

Author(s) -

M. Tavani

Publication year - 1997

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 - 10.1086/310751

Subject(s) - gamma ray burst , afterglow , physics , astrophysics , neutron star , adiabatic process , flux (metallurgy) , x ray , gamma ray , spectral properties , astronomy , nuclear physics , quantum mechanics , materials science , metallurgy

We consider possible interpretations of the recently detected X- rayafterglow from the gamma-ray burst source GRB 970228. Cosmological and Galacticmodels of gamma-ray bursts predict different flux and spectral evolution ofX-ray afterglows. We show that models based on adiabatic expansion ofrelativistic forward shocks require very efficient particle energization orpost-burst re-acceleration during the expansion. Cooling neutron star modelspredict a very distinctive spectral and flux evolution that can be tested incurrent X-ray data.Comment: 15 pages, 2 postscript files with figures submitted to Astrophys. J. Letters, March 18, 199

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