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On the Induced Gravitational Collapse of a Neutron Star to a Black Hole by a Type Ib/c Supernova
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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 (orbital period <1 h) binary system composed of an evolved star with a Neutron Star (NS) companion is considered. We evaluate the accretion rate onto the NS of the material expelled from the explosion of the core progenitor as a type Ib/c SN, and give the explicit expression of the accreted mass as a function of the nature of the components and binary parameters. We show that the NS 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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Cited by 1 Pith paper
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On the formation of strange quark stars from supernova in compact binaries
In a binary containing a neutron star and an exploding star, hypercritical accretion can push neutron stars past the density threshold for quark deconfinement, forming strange quark stars.
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