Torsional oscillations of crystalline color-superconducting hybrid stars: Possible sources for Advanced LIGO?
arXiv:1311.2654 · doi:10.1103/PhysRevD.88.124002
Abstract
Deconfined quark matter may exist in a crystalline color-superconducting phase in the interiors of compact stars. In this paper, we study the torsional oscillations of compact stars featuring a crystalline color-superconducting quark-matter core in general relativity. Depending on the size of the crystalline core and the value of the gap parameter , we find that the frequencies of the torsional oscillation modes can range from a few hundred hertz to a few kilohertz for our canonical compact star models. We have also studied the prospect for detecting the gravitational-wave signals emitted from these modes in a pulsar glitch event. Assuming that at least of the energy released in a Vela glitch can be channeled to the oscillation modes, we find that the Einstein Telescope should be able to detect these signals in quite general situations. Furthermore, if the size of the crystalline core is comparable to the stellar radius and the gap parameter is relatively small at MeV, the signal-to-noise ratio for Advanced LIGO could reach 10 for a Vela glitch. Our optimistic results suggest that we might already be able to probe the nature of crystalline color-superconducting quark matter with the second-generation gravitational-wave detectors when they come online in the next few years.
Minor changes to match the published version
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Cited by in corpus (9)
- Tidal deformations of compact stars with crystalline quark matter
- Probing hybrid stars with gravitational waves via interfacial modes
- Two-layer compact stars with crystalline quark matter: Screening effect on the tidal deformability
- Electromagnetic signals from bare strange stars
- Hybrid Strangeon Stars
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