2006 Supplement 2: 2005 LAKE HANAS INTERNATIONAL PULSAR SYMPOSIUM / Yuan

Evolutionary Sequences of Rotating Protoneutron Stars with Hyperons

Ye-Fei Yuan, Jeremy S. Heyl

Abstract


Escape of the trapped neutrinos from a protoneutron star might cause a phase transition from a core nucleonic neutron star to a core hyperonic neutron star, which leads to the softening of the equation of state. We study the effects of the phase transition on the rotational evolution of a protoneutron star. It is found that the star keeps shrinking and spinning up until all the trapped neutrinos escape. If the hyperonic star is metastable, its rotational frequency accelerates distinguishedly before it collapses to a black hole.


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DOI: https://doi.org/10.1088/1009-9271/6/S2/47

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