6533b851fe1ef96bd12a9a3a
RESEARCH PRODUCT
Influence of pions and hyperons on stellar black hole formation
Micaela OertelJérôme NovakBruno Peressubject
High Energy Astrophysical Phenomena (astro-ph.HE)Physics[PHYS]Physics [physics]Nuclear and High Energy PhysicsNuclear Theory010308 nuclear & particles physicsAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesPrimordial black holeAstrophysics01 natural sciencesNuclear Theory (nucl-th)Black holeBinary black holeRotating black holeIntermediate-mass black hole0103 physical sciencesExtremal black holeStellar black holeQ starAstrophysics - High Energy Astrophysical Phenomena[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]010303 astronomy & astrophysicsComputingMilieux_MISCELLANEOUSdescription
We present numerical simulations of stellar core-collapse with spherically symmetric, general relativistic hydrodynamics up to black hole formation. Using the CoCoNuT code, with a newly developed grey leakage scheme for the neutrino treatment, we investigate the effects of including pions and \Lambda-hyperons into the equation of state at high densities and temperatures on the black hole formation process. Results show non-negligible differences between the models with reference equation of state without any additional particles and models with the extended ones. For the latter, the maximum masses supported by the proto-neutron star are smaller and the collapse to a black hole occurs earlier. A phase transition to hyperonic matter is observed when the progenitor allows for a high enough accretion rate onto the proto-neutron star. Rough estimates of neutrino luminosity from these collapses are given, too.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-02-01 | Phys. Rev. D., 87, id.043006 (2013) |