First search for gravitational waves from the youngest known neutron star
Author(s)Barsotti, Lisa; Blackburn, Lindy L.; Foley, Stephany; Harry, Gregory; Hughey, Barbara; Katsavounidis, Erotokritos; Matichard, Fabrice; Mavalvala, Nergis; Smith, Nicolas de Mateo; Stein, Andrew J.; Stein, Leo Chaim; Waldman, Samuel J.; Weiss, Rainer; Corbitt, Thomas R; Evans, Matthew J; Fritschel, Peter K; MacInnis, Myron E; Mittleman, Richard K; Shoemaker, David H; Bodiya, Timothy P.; Donovan, Frederick J; Mason, Kenneth R; Shapiro, B.; ... Show more Show less
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We present a search for periodic gravitational waves from the neutron star in the supernova remnant Cassiopeia A. The search coherently analyzes data in a 12 day interval taken from the fifth science run of the Laser Interferometer Gravitational-Wave Observatory. It searches gravitational-wave frequencies from 100 to 300 Hz and covers a wide range of first and second frequency derivatives appropriate for the age of the remnant and for different spin-down mechanisms. No gravitational-wave signal was detected. Within the range of search frequencies, we set 95% confidence upper limits of (0.7-1.2) × 10[superscript –24] on the intrinsic gravitational-wave strain, (0.4-4) × 10[superscript –4] on the equatorial ellipticity of the neutron star, and 0.005-0.14 on the amplitude of r-mode oscillations of the neutron star. These direct upper limits beat indirect limits derived from energy conservation and enter the range of theoretical predictions involving crystalline exotic matter or runaway r-modes. This paper is also the first gravitational-wave search to present upper limits on the r-mode amplitude.
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering; Massachusetts Institute of Technology. Department of Physics; LIGO (Observatory : Massachusetts Institute of Technology); MIT Kavli Institute for Astrophysics and Space Research
Abadie, J. et al. “First search for gravitational waves from the youngest known neutron star.” The Astrophysical Journal 722.2 (2010): 1504–1513.
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