On the collapse of neutron stars and stellar cores to pion-condensed stars |
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| Authors: | B Kämpfer |
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| Institution: | (1) Zentralinstitut für Kernforschung Rossendorf, Dresden, D.D.R. |
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| Abstract: | The transition from a neutron star to a pion-condensed star is investigated in Newtonian hydrodynamics. It is shown that in
a certain range of ultradense equations of state, there occurs a mass ejection with energies comparable with usual supernova
outputs. But the ejected mass is only in the order of 0.02M
⊙.
Therefore, the observable consequences of this transition are not so dramatic as conjectured recently. In a realistic scenario
including a stiff ultradense equation of state and a weak effect of pion condensation the mass ejection disappears.
Additionally the collapse of a stellar core to a neutron star with pion-condensed core is considered. In comparison with a
standard supernova scenario we find only a slightly reduced explosion energy.
Further, the possible consequence of pion condensation during the secular evolution of the bounced core of a collapsing star
to the cool final neutron star is discussed. |
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| Keywords: | |
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