Constraining gamma-ray burst progenitors
نویسندگان
چکیده
منابع مشابه
Gravitational Radiation from Gamma-Ray Burst Progenitors
We study gravitational radiation from various proposed gamma-ray burst (GRB) progenitor models, in particular compact mergers and massive stellar collapses. These models have in common a high angular rotation rate, and the final stage involves a rotating black hole and accretion disk system. We consider the in-spiral, merger and ringing phases, and for massive collapses we consider the possible...
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We point out that already existing literature on relativistic collisionless MHD shocks show that the parameter σ ≡ upstream proper magnetic energy density/upstream rest mass energy density, plays an important role in determining the structure and accelerating properties of such shocks. By adopting the value of σ ≈ 0.002 which corresponds to the relativistic shock associated with the Crab nebula...
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The observed association of Long GammaRay Bursts (LGRBs) with peculiar Type Ic supernovae gives support to Woosley‘s collapsar/hypernova model, in which the GRB is produced by the collapse of the rapidly rotating core of a massive star to a black hole. The association of LGRBs with small starforming galaxies suggests low-metallicity to be a condition for a massive star to evolve to the collapsa...
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Gamma-ray burst (GRB) afterglow observations have allowed us to significantly constrain the engines producing these energetic explosions. Te redshift and position information provided by these afterglows have already allowed us to limit the progenitors of GRBs to only a few models. The afterglows may also provide another observation that can place further constraints on the GRB progenitor: meas...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2011
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921312012756