Hyperon bulk viscosity in the presence of antikaon condensate

Details Hyperon bulk viscosity in the presence of antikaon condensate Hyperon bulk viscosity in the presence of antikaon condensate

2007-12-19

arxiv.org/abs/0712.3171v2

Astrophys.J.680:686-694,2008

Astronomy and Astrophysics

Astrophysics

AASTeX; 21 pages including 5 figures; change in the title and replaced by the revised version

Scientific paper

10.1086/587956

We investigate the hyperon bulk viscosity due to the non-leptonic process $n + p \rightleftharpoons p + \Lambda $ in $K^-$ condensed matter and its effect on the r-mode instability in neutron stars. We find that the hyperon bulk viscosity coefficient in the presence of antikaon condensate is suppressed compared with the case without the condensate. The suppressed hyperon bulk viscosity in the superconducting phase is still an efficient mechanism to damp the r-mode instability in neutron stars.

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