An Einstein@home search for continuous gravitational waves from Cassiopeia A
arXiv:1608.07589 · doi:10.1103/PhysRevD.94.082008
Abstract
We report the results of a directed search for continuous gravitational-wave emission in a broad frequency range (between 50 and 1000 Hz) from the central compact object of the supernova remnant Cassiopeia A (Cas A). The data comes from the sixth science run of LIGO and the search is performed on the volunteer distributed computing network Einstein@Home. We find no significant signal candidate, and set the most constraining upper limits to date on the gravitational-wave emission from Cas A, which beat the indirect age-based upper limit across the entire search range. At around 170 Hz (the most sensitive frequency range), we set 90% confidence upper limits on the gravitational wave amplitude of , roughly twice as constraining as the upper limits from previous searches on Cas A. The upper limits can also be expressed as constraints on the ellipticity of Cas A; with a few reasonable assumptions, we show that at gravitational-wave frequencies greater than 300~Hz, we can exclude an ellipticity of .
29 pages, 7 figures, 3 tables
References in corpus (7)
- LIGO: The Laser Interferometer Gravitational-Wave Observatory
- The Expansion Asymmetry and Age of the Cassiopeia A Supernova Remnant
- Searching for gravitational waves from Cassiopeia A with LIGO
- Exploiting Large-Scale Correlations to Detect Continuous Gravitational Waves
- Parameter-space metric of semicoherent searches for continuous gravitational waves
- Braking Index of Isolated Pulsars
- Results of the deepest all-sky survey for continuous gravitational waves on LIGO S6 data running on the Einstein@Home volunteer distributed computing project