Jorge A. Rueda, Remo Ruffini
It is understood that the Supernovae (SNe) associated to Gamma Ray Bursts (GRBs) are of type Ib/c. The temporal coincidence of the GRB and the SN represents still a major enigma of Relativistic Astrophysics. We elaborate here, from the earlier paradigm, that the concept of induced gravitational collapse is essential to explain the GRB-SN connection. The specific case of a close (period $<1$ h) binary system composed of an evolved C+O core with a neutron star companion is considered. We evaluate the accretion rate onto the neutron star when the C+O star explodes as a type Ib/c SN and the explicit expression of the accreted mass as a function of the nature of the components and binary parameters is given. We show that the neutron star can reach, in a few seconds, the critical mass and consequently gravitationally collapses to a black hole. This gravitational collapse process leads to the emission of the GRB.
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http://arxiv.org/abs/1206.1684
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