Tübingen 2003 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 42: Kern- und Teilchen-Astrophysik IV
HK 42.8: Vortrag
Donnerstag, 20. März 2003, 15:45–16:00, F
Catastrophic rearrangement of a compact star due to the quark core formation — •Matthias Hanauske1, I.N. Mishustin1,2,3, L.M. Satarov1,2, A. Bhattacharyya1,4, H. Stöcker1, and W. Greiner1 — 1Institut für Theoretische Physik, J.W. Goethe–Universität, D–60054 Frankfurt am Main, Germany — 2The Kurchatov Institute, Russian Research Center, 123182 Moscow, Russia — 3The Niels Bohr Institute, DK-2100 Copenhagen Ø, Denmark — 4Scottish Church College, 1&3 Urquhart Square, 700 006 Calcutta, India
We study properties of compact stars with the deconfinement phase transition in their interiors. The equation of state of cold baryon-rich matter is constructed by combining a relativistic mean-field model for the hadronic phase and different quark-matter models (NJL, MIT-Bag) for the deconfined phase. In a narrow parameter range two sequences of compact stars (twin stars), which differ by the size of the quark core, have been found in one model. We demonstrate the possibility of a rapid transition between the twin stars with the energy release of about 1052 ergs. This transition should be accompanied by the prompt neutrino- and gravitational-wave burst and the delayed gamma-ray burst (hep-ph/0210422).