TY - JOUR

T1 - Search for continuous gravitational waves from small-ellipticity sources at low frequencies

AU - Dergachev, Vladimir

AU - Papa, Maria Alessandra

N1 - Funding Information: The authors thank the scientists, engineers and technicians of LIGO, whose hard work and dedication produced the data that made this search possible. The search was performed on the ATLAS cluster at AEI Hannover. We thank Bruce Allen, Carsten Aulbert, and Henning Fehrmann for their support. This research has made use of data, software, and/or web tools obtained from the LIGO Open Science Center (), a service of LIGO Laboratory, the LIGO Scientific Collaboration, and the Virgo Collaboration. LIGO is funded by the U.S. National Science Foundation. Virgo is funded by the French Centre National de Recherche Scientifique (CNRS), the Italian Istituto Nazionale della Fisica Nucleare (INFN), and the Dutch Nikhef, with contributions by Polish and Hungarian institutes.

PY - 2021/8/15

Y1 - 2021/8/15

N2 - 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 . 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)PRLTAO0031-900710.1103/PhysRevLett.123.101101] 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 easily accommodating sources with ellipticities of at a distance of a few hundred parsecs. New outliers are found, many of which we are unable to associate with any instrumental cause.

AB - 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 . 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)PRLTAO0031-900710.1103/PhysRevLett.123.101101] 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 easily accommodating sources with ellipticities of at a distance of a few hundred parsecs. New outliers are found, many of which we are unable to associate with any instrumental cause.

UR - http://www.scopus.com/inward/record.url?scp=85112766651&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.104.043003

DO - 10.1103/PhysRevD.104.043003

M3 - Article

AN - SCOPUS:85112766651

VL - 104

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 4

M1 - 043003

ER -