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- W3101472299 abstract "We investigate the properties of relativistic $r$-modes of slowly rotating neutron stars by using a relativistic version of the Cowling approximation. In our formalism, we take into account the influence of the Coriolis like force on the stellar oscillations, but ignore the effects of the centrifugal like force. For three neutron star models, we calculated the fundamental $r$-modes with $l'=m=2$ and 3. We found that the oscillation frequency $barsigma$ of the fundamental $r$-mode is in a good approximation given by $barsigmaapprox kappa_0 Omega$, where $barsigma$ is defined in the corotating frame at the spatial infinity, and $Omega$ is the angular frequency of rotation of the star. The proportional coefficient $kappa_0$ is only weakly dependent on $Omega$, but it strongly depends on the relativistic parameter $GM/c^2R$, where $M$ and $R$ are the mass and the radius of the star. All the fundamental $r$-modes with $l'=m$ computed in this study are discrete modes with distinct regular eigenfunctions, and they all fall in the continuous part of the frequency spectrum associated with Kojima's equation (Kojima 1998). These relativistic $r$-modes are obtained by including the effects of rotation higher than the first order of $Omega$ so that the buoyant force plays a role, the situation of which is quite similar to that for the Newtonian $r$-modes." @default.
- W3101472299 created "2020-11-23" @default.
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- W3101472299 date "2002-03-10" @default.
- W3101472299 modified "2023-09-26" @default.
- W3101472299 title "Relativistic<i>r</i>‐Modes in Slowly Rotating Neutron Stars: Numerical Analysis in the Cowling Approximation" @default.
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- W3101472299 doi "https://doi.org/10.1086/338663" @default.
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