Remnants from Gamma‐Ray Bursts | Zendy

Shai Ayal | Zendy; Tsvi Piran | Zendy

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Remnants from Gamma‐Ray Bursts

Author(s) -

Shai Ayal,

Tsvi Piran

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 - 10.1086/321431

Subject(s) - gamma ray burst , physics , astrophysics , bremsstrahlung , interstellar medium , galaxy , supernova remnant , supernova , synchrotron radiation , astronomy , gamma ray , synchrotron , nuclear physics , electron

We model the intermediate time evolution of a "jetted" gamma-ray burst by twoblobs of matter colliding with the interstellar medium. We follow thehydrodynamical evolution of this system numerically and calculate thebremsstrahlung and synchrotron images of the remnant. We find that for a burstenergy of $10^{51}$ erg the remnant becomes spherical after $\sim 5000$ yearswhen it collects $\sim 50M_\odot$ of interstellar mass. This result isindependent of the exact details of the GRB, such as the opening angle. Afterthis time a gamma-ray burst remnant has an expanding sphere morphology. Thesimilarity to a supernova remnant makes it difficult distinguish between thetwo at this stage. The expected number of non-spherical gamma-ray burstremnants is $\sim0.05$ per galaxy for a beaming factor of 0.01 and a burstenergy of $10^{51}$ erg. Our results suggest that that the double-shell objectDEM L 316 is not a GRB remnant.Comment: 16 pages, 9 figures, Substantial revisions, Accepted by Ap

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