Frequency band of the f-mode Chandrasekhar-Friedman-Schutz instability
- Theoretical Astrophysics, University of Tuebingen, Auf der Morgenstelle 10, Tuebingen 72076 (Germany)
- Center for Computation and Technology, Louisiana State University, Baton Rouge, Louisiana 70803 (United States)
- Department of Physics, Section of Astrophysics, Astronomy, and Mechanics, Aristotle University of Thessaloniki, Thessaloniki, 54124 Greece (Greece)
Rapidly rotating neutron stars can be unstable to the gravitational-wave-driven Chandrasekhar-Friedman-Schutz (CFS) mechanism if they have a neutral point in the spectrum of nonaxisymmetric f-modes. We investigate the frequencies of these modes in two sequences of uniformly rotating polytropes using nonlinear simulations in full general relativity, determine the approximate locations of the neutral points, and derive limits on the observable frequency band available to the instability in these sequences. We find that general relativity enhances the detectability of a CFS-unstable neutron star substantially, both by widening the instability window and enlarging the band into the optimal range for interferometric detectors like LIGO, VIRGO, and GEO-600.
- OSTI ID:
- 21409623
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 81, Issue 8; Other Information: DOI: 10.1103/PhysRevD.81.084055; (c) 2010 The American Physical Society; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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