期刊
PHYSICAL REVIEW D
卷 88, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.88.101302
关键词
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资金
- Ministry of Education and Science of Russian Federation [11.G34.31.0001, 8409, 2012]
- RFBR
- RFBR [11-02-00253-a, 12-02-31270-mol-a]
- RF president programme [MK-857.2012.2, NSh-4035.2012.2]
We suggest that specific thermal low-frequency g-modes can exist in superfluid neutron stars. They can be excited in the matter with a nonzero gradient of entropy per electron. We determine the Brunt-Vaisala frequency for these modes and demonstrate that they can be unstable with respect to convection. The criterion for the instability onset (analogue of the well-known Schwarzschild criterion) is derived. It is very sensitive to the equation of state and a model of nucleon superfluidity. In particular, convection may occur for both positive and negative temperature gradients. Our results may have interesting implications for neutron star cooling and seismology.
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