Searches for continuous gravitational waves from nine young supernova remnants

Journal Article · Sun Nov 01 00:00:00 EDT 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/813/1/39· OSTI ID:22882451

Aasi, J.; Abbott, B. P.; Abbott, R.; Abernathy, M. R.; Adhikari, R. X. ^[1]; Abbott, T. ^[2]; Acernese, F. ^[3]; Ackley, K. ^[4]; Adams, C. ^[5]; Adams, T. ^[6]; Addesso, P. ^[7]; Adya, V.; Affeldt, C. ^[8]; Agathos, M.; Agatsuma, K. ^[9]; Aggarwal, N. ^[10]; Aguiar, O. D. ^[11]; Ain, A. ^[12]; Ajith, P. ^[13]; Alemic, A. ^[14] ; others, and

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1. LIGO, California Institute of Technology, Pasadena, CA 91125 (United States)
2. Louisiana State University, Baton Rouge, LA 70803 (United States)
3. Università di Salerno, Fisciano, I-84084 Salerno (Italy)
4. University of Florida, Gainesville, FL 32611 (United States)
5. LIGO Livingston Observatory, Livingston, LA 70754 (United States)
6. Cardiff University, Cardiff, CF24 3AA (United Kingdom)
7. University of Sannio at Benevento, I-82100 Benevento, Italy and INFN, Sezione di Napoli, I-80100 Napoli (Italy)
8. Experimental Group, Albert-Einstein-Institut, Max-Planck-Institut für Gravitationsphysik, D-30167 Hannover (Germany)
9. Nikhef, Science Park, 1098 XG Amsterdam (Netherlands)
10. LIGO, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)
11. Instituto Nacional de Pesquisas Espaciais, 12227-010 São José dos Campos, SP (Brazil)
12. Inter-University Centre for Astronomy and Astrophysics, Pune 411007 (India)
13. International Centre for Theoretical Sciences, Tata Institute of Fundamental Research, Bangalore 560012 (India)
14. Syracuse University, Syracuse, NY 13244 (United States)

We describe directed searches for continuous gravitational waves (GWs) in data from the sixth Laser Interferometer Gravitational-wave Observatory (LIGO) science data run. The targets were nine young supernova remnants not associated with pulsars; eight of the remnants are associated with non-pulsing suspected neutron stars. One target's parameters are uncertain enough to warrant two searches, for a total of 10. Each search covered a broad band of frequencies and first and second frequency derivatives for a fixed sky direction. The searches coherently integrated data from the two LIGO interferometers over time spans from 5.3–25.3 days using the matched-filtering F-statistic. We found no evidence of GW signals. We set 95% confidence upper limits as strong (low) as 4 × 10{sup −25} on intrinsic strain, 2 × 10{sup −7} on fiducial ellipticity, and 4 × 10{sup −5} on r-mode amplitude. These beat the indirect limits from energy conservation and are within the range of theoretical predictions for neutron-star ellipticities and r-mode amplitudes.

• OSTI ID: 22882451
• Journal Information: Astrophysical Journal, Vol. 813, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Since 2009, the country of publication for this journal is the UK.; ISSN 0004-637X
• Country of Publication: United Kingdom
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
AMPLITUDES
GRAVITATIONAL WAVES
INTERFEROMETERS
NEUTRON STARS
PULSARS
STATISTICS
SUPERNOVA REMNANTS