Search for continuous gravitational waves from small-ellipticity sources at low frequencies

Dergachev, Vladimir; Papa, Maria Alessandra

doi:10.1103/PhysRevD.104.043003

Search for continuous gravitational waves from small-ellipticity sources at low frequencies

Apr 18, 2021

6 pages

Published in:

Phys.Rev.D 104 (2021) 4, 043003

Published: Aug 3, 2021

e-Print:

2104.09007 [gr-qc]

DOI:

10.1103/PhysRevD.104.043003 (publication)

View in:

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Abstract: (APS)

We present the results of an all-sky search for continuous gravitational wave signals with frequencies in the 20–500 Hz range from neutron stars with ellipticity of

\approx 10^{- 8}

. This frequency region is particularly hard to probe because of the quadratic dependence of signal strength on frequency. The search employs the Falcon analysis pipeline [Dergachev and Papa, Phys. Rev. Lett. 123, 101101 (2019)] on LIGO O2 public data. Compared to previous Falcon analyses the coherence length has been quadrupled, with a corresponding increase in sensitivity. This enables us to search for small-ellipticity neutron stars in this low frequency region up to 44 pc away. The frequency derivative range is up to

3 \times 10^{- 13} Hz / s

easily accommodating sources with ellipticities of

10^{- 7}

at a distance of a few hundred parsecs. New outliers are found, many of which we are unable to associate with any instrumental cause.

Note:

6 pages, comments welcome

frequency: low
coherence: length
gravitational radiation
neutron star
data analysis method: sensitivity
gravitational radiation: emission
gravitational radiation: frequency
numerical methods
numerical calculations
LIGO

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