Details

Autor(en) / Beteiligte

• Papa, Maria Alessandra
• Eggenstein, Heinz-Bernd
• Walsh, Sinéad
• Di Palma, Irene
• Allen, Bruce
• Astone, Pia
• Bock, Oliver
• Creighton, Teviet D.
• Keitel, David
• Machenschalk, Bernd
• Prix, Reinhard
• Siemens, Xavier
• Singh, Avneet
• Zhu, Sylvia J.
• Schutz, Bernard F.

Titel

Hierarchical follow-up of subthreshold candidates of an all-sky Einstein@Home search for continuous gravitational waves on LIGO sixth science run data

Ist Teil von

• Physical review. D, 2016-12, Vol.94 (12), Article 122006

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We report results of an all-sky search for periodic gravitational waves with frequency between 50 and 510 Hz from isolated compact objects, e.g., neutron stars. A new hierarchical multistage approach is taken, supported by the computing power of the Einstein@Home project, allowing us to probe more deeply than ever before. 16 million subthreshold candidates from the initial search [LIGO Scientific and Virgo Collaborations, Phys. Rev. D 94, 102002 (2016)] are followed up in four stages. None of those candidates is consistent with an isolated gravitational wave emitter, and 90% confidence level upper limits are placed on the amplitudes of continuous waves from the target population. Between 170.5 and 171 Hz, we set the most constraining 90% confidence upper limit on the strain amplitude h0 at 4.3×10−25, while at the high end of our frequency range, we achieve an upper limit of 7.6×10−25. These are the most constraining all-sky upper limits to date and constrain the ellipticity of rotating compact objects emitting at 300 Hz at a distance D to less than 6×10−7 [D100  pc].