Abadie, J. and Abbott, B. P. and Abbott, R. and Adhikari, R. and Ajith, P. and Anderson, S. B. and Araya, M. and Aronsson, M. and Aso, Y. and Ballmer, S. and Betzwieser, J. and Billingsley, G. and Black, E. and Bork, R. and Boyle, M. and Brooks, A. F. and Cannon, K. C. and Cepeda, C. and Chalermsongsak, T. and Chen, Y. and Coyne, D. C. and Dannenberg, R. and Daudert, B. and Dergachev, V. and DeSalvo, R. and Drever, R. W. P. and Driggers, J. C. and Ehrens, P. and Engel, R. and Etzel, T. and Gustafson, E. K. and Hanna, C. and Heefner, J. and Heptonstall, A. and Hodge, K. A. and Ivanov, A. and Kalmus, P. and Kells, W. and Keppel, D. G. and King, P. J. and Kondrashov, V. and Kozak, D. and Lazzarini, A. and Lindquist, P. E. and Luan, J. and Mageswaran, M. and Mailand, K. and Mak, C. and Maros, E. and Marx, J. N. and McIntyre, G. and Meshkov, S. and Mino, Y. and Mitra, S. and Nash, T. and Ogin, G. H. and Osthelder, C. and Patel, P. and Pedraza, M. and Robertson, N. A. and Sannibale, V. and Searle, A. C. and Seifert, F. and Sengupta, A. S. and Singer, A. and Smith, M. R. and Somiya, K. and Stochino, A. and Taylor, R. and Thorne, K. S. and Torrie, C. I. and Vallisneri, M. and Vass, S. and Villar, A. and Wallace, L. and Ward, R. L. and Weinstein, A. J. and Whitcomb, S. E. and Willems, P. A. and Yamamoto, H. and Yeaton-Massey, D. and Zhang, L. and Zweizig, J. (2010) First search for gravitational waves from the youngest known neutron star. Astrophysical Journal, 722 (2). pp. 1504-1513. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20101206-105405445
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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^(−24) on the intrinsic gravitational-wave strain, (0.4–4) × 10^(−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.
|Additional Information:||© 2010 American Astronomical Society. Received 2010 June 30; accepted 2010 August 21; published 2010 September 30. The authors gratefully acknowledge the support of the United States National Science Foundation for the construction and operation of the LIGO Laboratory and the Science and Technology Facilities Council of the United Kingdom, the Max-Planck- Society, and the State of Niedersachsen/Germany for support of the construction and operation of the GEO600 detector. The authors also gratefully acknowledge the support of the research by these agencies and by the Australian Research Council, the Council of Scientific and Industrial Research of India, the Istituto Nazionale di FisicaNucleare of Italy, the Spanish Ministerio de Educaci´on y Ciencia, the Conselleria d’Economia, Hisenda i Innovaci´o of the Govern de les Illes Balears, the Royal Society, the Scottish Funding Council, the Scottish Universities Physics Alliance, The National Aeronautics and Space Administration, the Carnegie Trust, the Leverhulme Trust, the David and Lucile Packard Foundation, the Research Corporation, and the Alfred P. Sloan Foundation. This paper has been designated LIGO Document No. LIGO-P1000028-v7.|
|Subject Keywords:||gravitational waves, stars: neutron, supernovae: individual (Cassiopeia A)|
|Classification Code:||PACS: 97.60.Jd Neutron stars; 95.30.Sf Relativity and gravitation; 98.38.Mz Supernova remnants; 97.10.Cv Stellar structure, interiors, evolution, nucleosynthesis, ages|
|Official Citation:||J. Abadie et al 2010 ApJ 722 1504. doi: 10.1088/0004-637X/722/2/1504|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Benjamin Perez|
|Deposited On:||06 Dec 2010 23:50|
|Last Modified:||26 Dec 2012 12:43|
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