منابع مشابه
Gamma-Ray Bursts: The Central Engine
A variety of arguments suggest that the most common form of gammaray bursts (GRBs), those longer than a few seconds, involve the formation of black holes in supernova-like events. Two kinds of “collapsar” models are discussed, those in which the black hole forms promptly a second or so after iron core collapse and those in which formation occurs later, following “fallback” over a period of minu...
متن کاملCentral engine afterglow of Gamma-ray Bursts
Before 2004, nearly all GRB afterglow data could be understood in the context of the external shocks model. This situation has changed in the past two years, when it became clear that some afterglow components should be attributed to the activity of the central engine; i.e., the central engine afterglow. We review here the afterglow emission that is directly related to the GRB central engine. S...
متن کاملProlonged activity of the central engine of Gamma Ray Bursts
We call “prompt" emission of Gamma Ray Bursts (GRBs) the erratic and violent phase of hard X-ray and soft γ–ray emission, usually lasting for tens of seconds in long GRBs. However, the central engine of GRBs may live much longer. Evidence of it comes from the strange behaviour of the early “afterglow", seen especially in the X–ray band, characterised by a “steep–flat–steep" light–curve, very of...
متن کاملOn the Central Engine of short Gamma-ray Bursts
While there is so far no direct evidence linking coalescences of double neutron star systems to gamma-ray bursts (GRBs), they are a certainly a very plausible candidate for the subclass of short GRBs as they can provide huge reservoirs of gravitational binding energy and are expected to lead naturally to short overall durations with variations on millisecond time scales. Moreover, they possess ...
متن کاملOn Gamma-Ray Bursts
R. Ruffini,1,2,3 M.G. Bernardini,1,2 C.L. Bianco,1,2,3 L. Caito,1,2 P. Chardonnet,1,3,4 C. Cherubini,1,5 M.G. Dainotti,1,2 F. Fraschetti, A. Geralico,1,2 R. Guida,1,2 B. Patricelli,1,2 M. Rotondo,1,2 J.A. Rueda Hernandez,1,2 G. Vereshchagin,1,2,3 S.-S. Xue1,3 1 ICRANet and ICRA, Piazzale della Repubblica 10, I-65122 Pescara, Italy. 2 Dip. di Fisica, Università di Roma “La Sapienza”, Piazzale Al...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2005
ISSN: 0004-637X,1538-4357
DOI: 10.1086/496881