Influence of pions and hyperons on stellar black hole formation

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 [Lambd...

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Veröffentlicht in:Physical review. D 2013-02, Vol.87 (4), Article 043006
Hauptverfasser: Peres, Bruno, Oertel, Micaela, Novak, Jérôme
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Sprache:eng
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Zusammenfassung: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.
ISSN:1550-7998
2470-0010
1550-2368
2470-0029
DOI:10.1103/PhysRevD.87.043006