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Dynamical instability of differentially rotating stars
| Content Provider | Paperity |
|---|---|
| Author | Shibata, Masaru Karino, Shigeyuki Eriguchi, Yoshiharu |
| Abstract | We study the dynamical instability against bar-mode deformation of differentially rotating stars. We performed numerical simulation and linear perturbation analysis adopting polytropic equations of state with the polytropic index n= 1. It is found that rotating stars of a high degree of differential rotation are dynamically unstable even for the ratio of the kinetic energy to the gravitational potential energy of O(0.01). Gravitational waves from the final non-axisymmetric quasi-stationary states are calculated in the quadrupole formula. For rotating stars of mass 1.4 M⊙ and radius several 10 km, gravitational waves have frequency several 100 Hz and effective amplitude ∼5 × 10−22 at a distance of ∼100 Mpc. |
| Starting Page | L27 |
| Ending Page | L31 |
| File Format | HTM / HTML |
| ISSN | 00358711 |
| DOI | 10.1046/j.1365-8711.2002.05724.x |
| Issue Number | 2 |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume Number | 334 |
| e-ISSN | 13652966 |
| Language | English |
| Publisher | Oxford University Press |
| Publisher Date | 2002-08-01 |
| Access Restriction | Open |
| Subject Keyword | Stars: neutron Gravitational waves Stars: oscillations Stars: rotation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
