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Title: HYPERCRITICAL ACCRETION, INDUCED GRAVITATIONAL COLLAPSE, AND BINARY-DRIVEN HYPERNOVAE

Journal Article · · Astrophysical Journal Letters
 [1]; ;  [2]
  1. CCS-2, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
  2. ICRANet, Piazza della Repubblica 10, I-65122 Pescara (Italy)

The induced gravitational collapse (IGC) paradigm has been successfully applied to the explanation of the concomitance of gamma-ray bursts (GRBs) with supernovae (SNe) Ic. The progenitor is a tight binary system composed of a carbon-oxygen (CO) core and a neutron star (NS) companion. The explosion of the SN leads to hypercritical accretion onto the NS companion, which reaches the critical mass, hence inducing its gravitational collapse to a black hole (BH) with consequent emission of the GRB. The first estimates of this process were based on a simplified model of the binary parameters and the Bondi-Hoyle-Lyttleton accretion rate. We present here the first full numerical simulations of the IGC phenomenon. We simulate the core-collapse and SN explosion of CO stars to obtain the density and ejection velocity of the SN ejecta. We follow the hydrodynamic evolution of the accreting material falling into the Bondi-Hoyle surface of the NS all the way up to its incorporation in the NS surface. The simulations go up to BH formation when the NS reaches the critical mass. For appropriate binary parameters, the IGC occurs in short timescales ∼10{sup 2}-10{sup 3} s owing to the combined effective action of the photon trapping and the neutrino cooling near the NS surface. We also show that the IGC scenario leads to a natural explanation for why GRBs are associated only with SNe Ic with totally absent or very little helium.

OSTI ID:
22364958
Journal Information:
Astrophysical Journal Letters, Vol. 793, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
Country of Publication:
United States
Language:
English

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Induced gravitational collapse in FeCO Core–Neutron star binaries and Neutron star–Neutron star binary mergers journal October 2015
Tetrads in SU(N) Yang–Mills geometrodynamics journal October 2019
Induced Gravitational Collapse, Binary-Driven Hypernovae, Long Gramma-ray Bursts and Their Connection with Short Gamma-ray Bursts journal May 2019
On the Induced Gravitational Collapse Scenario of Gamma-Ray Bursts Associated with Supernovae journal December 2016
On the Universal late X-Ray Emission of Binary-Driven Hypernovae and its Possible Collimation journal December 2016
Formation of Double Neutron Star Systems journal September 2017
Early X-Ray Flares in GRBs journal January 2018
Neutrino Oscillations within the Induced Gravitational Collapse Paradigm of Long Gamma-Ray Bursts journal January 2018
On the Rate and on the Gravitational Wave Emission of Short and Long GRBs journal May 2018
Related Progenitor Models for Long-duration Gamma-Ray Bursts and Type Ic Superluminous Supernovae journal May 2018
A GRB Afterglow Model Consistent with Hypernova Observations journal December 2018
On the Ultra-relativistic Prompt Emission, the Hard and Soft X-Ray Flares, and the Extended Thermal Emission in GRB 151027A journal December 2018
SPH Simulations of the Induced Gravitational Collapse Scenario of Long Gamma-Ray Bursts Associated with Supernovae journal January 2019
Two Predictions of Supernova: GRB 130427A/SN 2013cq and GRB 180728A/SN 2018fip journal March 2019
Angular momentum role in the hypercritical accretion of binary-driven hypernovae conference December 2017
Fast Rotating Neutron Stars with Realistic Nuclear Matter Equation of State text January 2015
On the rate and on the gravitational wave emission of short and long GRBs text January 2016
On the induced gravitational collapse scenario of gamma-ray bursts associated with supernovae text January 2016
On a GRB afterglow model consistent with hypernovae observations text January 2017
On the ultra-relativistic Prompt Emission (UPE), the Hard and Soft X-ray Flares, and the extended thermal emission (ETE) in GRB 151027A text January 2017
Common envelope jets supernova (CEJSN) impostors resulting from a neutron star companion text January 2018
Two Predictions of supernova: GRB 130427A / SN 2013cq and GRB 180728A / SN 2018fip text January 2018