Phys. Rev. Lett. 86, 1152–1155 (2001)Nonlinear Evolution of the r-Modes in Neutron StarsReceived 31 October 2000; published in the issue dated 12 February 2001 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. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.1152
DOI:
10.1103/PhysRevLett.86.1152
PACS:
04.40.Dg, 04.30.Db, 97.60.Jd
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