Journal ArticleDOI
Nonlinear evolution of the r-modes in neutron stars.
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TLDR
The evolution of a neutron-star r-mode driven unstable by gravitational radiation is studied here using numerical solutions of the full nonlinear fluid equations to study the nonlinear evolution of the mode.Abstract:
The evolution of a neutron-star $r$-mode driven unstable by gravitational radiation is studied here using numerical solutions of the full nonlinear fluid equations. The dimensionless amplitude of the mode grows to order unity before strong shocks develop which quickly damp the mode. In this simulation the star loses about $40%$ of its initial angular momentum and $50%$ of its rotational kinetic energy before the mode is damped. The nonlinear evolution causes the fluid to develop strong differential rotation which is concentrated near the surface and poles of the star.read more
Citations
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Book ChapterDOI
Instabilities of Relativistic Stars
TL;DR: A summary of relativistic stability theory given here is based on and includes excerpts from the book Rotating Relativistic Stars, by the present authors as discussed by the authors, which includes a discussion of the relativism of rotating stars in uniform rotation.
Journal ArticleDOI
Gravitational waves from compact objects
TL;DR: In this article, the proposed LISA spacecraft constellation will allow the detection of the gravitational signals, even within a "pessimistic" range of possible signals, produced during the capture of compact objects by supermassive black holes, at a rate of a few tens per year.
Journal ArticleDOI
Tayler instability with Hall effect in young neutron stars
TL;DR: In this article, it is shown that the toroidal field belts in young neutron stars induced by their differential rotation should have different amplitudes in both hemispheres which later are frozen in.
Journal ArticleDOI
Bulk viscosity in the nonlinear and anharmonic regime of strange quark matter
Igor A. Shovkovy,Xinyang Wang +1 more
TL;DR: In this article, the bulk viscosity of cold, dense three-flavor quark matter is studied as a function of temperature and the amplitude of density oscillations, and several qualitative effects due to the anharmonicity, although quantitatively they appear to be relatively small.
Journal ArticleDOI
The Critical Rotation of Strange Stars and Rapidly Rotating Pulsars
TL;DR: In this article, the authors utilize the bulk viscosity of interacting quark matter to reevaluate the damping timescale and find that the r-mode instability window is narrowed because of the medium effect, and hence, when a pulsar reaches the instability window, it will slow down by gravitational wave emission to a period of only 1.78 ms instead of the 2.5 ms.