Resonant tidal excitations of inertial modes in coalescing neutron star binaries
Abstract
We study the effect of resonant tidal excitation of inertial modes in neutron stars during binary inspiral. For spin frequencies less than 100 Hz, the phase shift in the gravitational waveform associated with the resonance is small and does not affect the matched filtering scheme for gravitational wave detection. For higher spin frequencies, the phase shift can become significant. Most of the resonances take place at orbital frequencies comparable to the spin frequency, and thus significant phase shift may occur only in the high-frequency band (hundreds of Hertz) of gravitational waves. The exception is a single odd-parity m=1 mode, which can be resonantly excited for misaligned spin-orbit inclinations, and may occur in the low-frequency band (tens of Hertz) of gravitational waves and induce significant (≫1radian) phase shift.
- Publication:
-
Physical Review D
- Pub Date:
- July 2006
- DOI:
- arXiv:
- arXiv:astro-ph/0604163
- Bibcode:
- 2006PhRvD..74b4007L
- Keywords:
-
- 04.40.Dg;
- 97.60.Jd;
- 97.80.-d;
- Relativistic stars: structure stability and oscillations;
- Neutron stars;
- Binary and multiple stars;
- Astrophysics
- E-Print:
- Minor changes. 6 pages. Phys. Rev. D. in press (volume 74, issue 2)