Einstein@Home search for continuous gravitational waves from Cassiopeia A

Zhu, Sylvia J.; Papa, Maria Alessandra; Eggenstein, H.-B.; Prix, Reinhard; Wette, Karl; Allen, Bruce; Bock, Oliver; Keitel, David; Krishnan, Badri; Machenschalk, Bernd; Shaltev, Miroslav; Siemens, Xavier

doi:10.1103/PhysRevD.94.082008

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Einstein@Home search for continuous gravitational waves from Cassiopeia A

MPS-Authors

Zhu, Sylvia J.
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Papa, Maria Alessandra
Searching for Continuous Gravitational Waves, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Eggenstein, H.-B.
Searching for Continuous Gravitational Waves, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Prix, Reinhard
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;
Searching for Continuous Gravitational Waves, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Wette, Karl
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Allen, Bruce
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Bock, Oliver
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Keitel, David
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Krishnan, Badri
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Machenschalk, Bernd
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;
Searching for Continuous Gravitational Waves, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Shaltev, Miroslav
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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1608.07589.pdf
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PRD.94.082008.pdf
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Citation

Zhu, S. J., Papa, M. A., Eggenstein, H.-B., Prix, R., Wette, K., Allen, B., et al. (2016). Einstein@Home search for continuous gravitational waves from Cassiopeia A. Physical Review D, 94: 082008. doi:10.1103/PhysRevD.94.082008.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-5D00-C

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 $h_0$ of $\sim\!\!~2.9\times 10^{-25}$, 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 $\gtrsim\!\!~10^{-5}$.