Constraining crystalline color superconducting quark matter with gravitational-wave data
- Department of Physics and Institute of Theoretical Physics, Chinese University of Hong Kong, Hong Kong (China)
We estimate the maximum equatorial ellipticity sustainable by compact stars composed of crystalline color-superconducting quark matter. For the theoretically allowed range of the gap parameter {delta}, the maximum ellipticity could be as large as 10{sup -2}, which is about 4 orders of magnitude larger than the tightest upper limit obtained by the recent science runs of the LIGO and GEO600 gravitational-wave detectors based on the data from 78 radio pulsars. We point out that the current gravitational-wave strain upper limit already has some implications for the gap parameter. In particular, the upper limit for the Crab pulsar implies that {delta} is less than O(20) MeV for a range of quark chemical potential accessible in compact stars, assuming that the pulsar has a mass 1.4M{sub {center_dot}}, radius 10 km, breaking strain 10{sup -3}, and that it has the maximum quadrupole deformation it can sustain without fracturing.
- OSTI ID:
- 21032406
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 76, Issue 8; Other Information: DOI: 10.1103/PhysRevD.76.081502; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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