Differential rotation of the unstable nonlinear r-modes
نویسندگان
چکیده
John L. Friedman, Lee Lindblom, and Keith H. Lockitch Department of Physics, Leonard Parker Center for Gravitation, Cosmology and Astrophysics, University of Wisconsin—Milwaukee, P.O. Box 413, Milwaukee, Wisconsin 53201, USA Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125, USA Center for Astrophysics and Space Sciences 0424, University of California at San Diego, 9500 Gilman Drive, La Jolla, California 92093-0424, USA Mathematical Sciences Center, Tsinghua University, Beijing 100084, China Department of Physics, Center for Theoretical Astrophysics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA (Received 8 April 2015; published 13 January 2016)
منابع مشابه
Nonlinear evolution of the r-modes in neutron stars.
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 energ...
متن کاملNonlinear Couplings Between r-modes of Rotating Neutron Stars
The r-modes of neutron stars can be driven unstable by gravitational radiation. While linear perturbation theory predicts the existence of this instability, linear theory can’t provide any information about the nonlinear development of the instability. The subject of this paper is the weakly nonlinear regime of fluid dynamics. In the weakly nonlinear regime, the nonlinear fluid equations are ap...
متن کاملLatitudinal Shear Instabilities during Type I X-ray Bursts
Coherent oscillations have been observed during thermonuclear (Type I) X-ray bursts from 14 accreting neutron stars in low mass X-ray binaries, providing important information about their spin frequencies. However, the origin of the brightness asymmetry on the neutron star surface producing these oscillations is still not understood. We study the stability of a zonal shearing flow on the neutro...
متن کاملStability of particle rotation in a rotating electric field.
Depending on the parameters of a particle and of a host medium, a particle in a rotating electric field can rotate either in the direction of rotation of electric field or in the opposite direction. There exists a range of parameters where both regimes of rotation can be realized simultaneously. In this study we investigate stability of rotation regimes in the whole range of parameters. We dete...
متن کاملVortex nucleation in a dissipative variant of the nonlinear Schrdinger equation under rotation
In the present work, we motivate and explore the dynamics of a dissipative variant of the nonlinear Schrödinger equation under the impact of external rotation. As in the well established Hamiltonian case, the rotation gives rise to the formation of vortices. We show, however, that the most unstable mode leading to this instability scales with an appropriate power of the chemical potential μ of ...
متن کامل