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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 308557.0, MPI für Astronomie / Publikationen_mpia
Cannonballs in the context of gamma ray bursts. Formation sites?
Authors:Staff, J. E.; Fendt, C.; Ouyed, R.
Date of Publication (YYYY-MM-DD):2006
Journal Abbrev.:Astronomy and Astrophysics
Volume:451
Start Page:1
End Page:8
Audience:Not Specified
Abstract / Description:We investigate possible formation sites of the cannonballs (in the gamma ray bursts context) by calculating their physical parameters, such as density, magnetic field, and temperature close to the origin. Our results favor scenarios where the cannonballs form as instabilities (knots) within magnetized jets from hyperaccreting disks. These instabilities would most likely set in beyond the light cylinder where flow velocity with Lorentz factors as high as 2000 can be achieved. The cannonball model for gamma ray bursts requires that cannonballs form inside core-collapse supernovae. Our findings challenge the cannonball model of gamma ray bursts, unless hyperaccreting disks and the corresponding jets are common occurrences in core-collapse SNe.
Free Keywords:gamma rays: bursts
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi...
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