First search for gravitational waves from the youngest known neutron star - General Relativity and Quantum CosmologyReport as inadecuate




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Abstract: We present a search for periodic gravitational waves from the neutron star inthe supernova remnant Cassiopeia A. The search coherently analyzes data in a12-day interval taken from the fifth science run of the Laser InterferometerGravitational-Wave Observatory. It searches gravitational wave frequencies from100 to 300 Hz, and covers a wide range of first and second frequencyderivatives appropriate for the age of the remnant and for different spin-downmechanisms. No gravitational wave signal was detected. Within the range ofsearch frequencies, we set 95% confidence upper limits of 0.7-1.2e-24 on theintrinsic gravitational wave strain, 0.4-4e-4 on the equatorial ellipticity ofthe neutron star, and 0.005-0.14 on the amplitude of r-mode oscillations ofthe neutron star. These direct upper limits beat indirect limits derived fromenergy conservation and enter the range of theoretical predictions involvingcrystalline exotic matter or runaway r-modes. This is the first gravitationalwave search to present upper limits on r-modes.



Author: LIGO Scientific Collaboration: J. Abadie, B. P. Abbott, R. Abbott, M. Abernathy, C. Adams, R. Adhikari, P. Ajith, B. Allen, G. Al

Source: https://arxiv.org/



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