Nonanalytic Relativistic r-Modes of Slowly Rotating Nonbarotropic Neutron Stars

被引:3
|
作者
Kraav, Kirill Y. [1 ]
Gusakov, Mikhail E. [1 ]
Kantor, Elena M. [1 ]
机构
[1] Ioffe Inst, Polytekh Skaya 26, St Petersburg 194021, Russia
基金
俄罗斯科学基金会;
关键词
asteroseismology; neutron stars; r-modes; hydrodynamics; relativity; INSTABILITY; SPECTRUM; OSCILLATIONS;
D O I
10.3390/universe8100542
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We show that the r-modes of slowly rotating nonbarotropic neutron stars are described by nonanalytic functions of stellar angular velocity, which makes the perturbation techniques, used so far in the r-mode theoretical studies, inapplicable. In contrast to those studies and in accordance with numerical calculations beyond the slow rotation approximation, the obtained r-mode spectrum is discrete, which resolves the continuous spectrum problem, lasting since 1997. Our findings imply that the relativistic r-modes in slowly rotating neutron stars dramatically differ from their Newtonian cousins, which may have important implications for the detectability of r-mode signatures in observations, in particular for the r-mode excitation efficiency during the neutron star inspirals.
引用
收藏
页数:9
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