We report on an all-sky search for periodic gravitational waves in the frequency band 20–475 Hz and with a frequency time derivative in the range of [−1.0, +0.1] × 1e-8 Hz/s. Such a signal could be produced by a nearby spinning and slightly nonaxisymmetric isolated neutron star in our galaxy. This search uses the data from Advanced LIGO’s first observational run, O1. No periodic gravitational wave signals were observed, and upper limits were placed on their strengths. The lowest upper limits on worst-case (linearly polarized) strain amplitude h0 are ∼ 4e-25 near 170 Hz. For a circularly polarized source (most favorable orientation), the smallest upper limits obtained are ∼1.5e-25. These upper limits refer to all sky locations and the entire range of frequency derivative values. For a population-averaged ensemble of sky locations and stellar orientations, the lowest upper limits obtained for the strain amplitude are ∼2.5e-25.

All-sky search for periodic gravitational waves in the O1 LIGO data

BRANCHESI, MARICA;CERBONI BAIARDI, LORENZO;GRECO, GIUSEPPE;GUIDI, GIANLUCA MARIA;HARMS, JAN;MARTELLI, FILIPPO;MONTANI, MATTEO;PIERGIOVANNI, FRANCESCO;STRATTA, MARIA GIULIANA;VETRANO, FLAVIO;VICERE', ANDREA;
2017

Abstract

We report on an all-sky search for periodic gravitational waves in the frequency band 20–475 Hz and with a frequency time derivative in the range of [−1.0, +0.1] × 1e-8 Hz/s. Such a signal could be produced by a nearby spinning and slightly nonaxisymmetric isolated neutron star in our galaxy. This search uses the data from Advanced LIGO’s first observational run, O1. No periodic gravitational wave signals were observed, and upper limits were placed on their strengths. The lowest upper limits on worst-case (linearly polarized) strain amplitude h0 are ∼ 4e-25 near 170 Hz. For a circularly polarized source (most favorable orientation), the smallest upper limits obtained are ∼1.5e-25. These upper limits refer to all sky locations and the entire range of frequency derivative values. For a population-averaged ensemble of sky locations and stellar orientations, the lowest upper limits obtained for the strain amplitude are ∼2.5e-25.
File in questo prodotto:
File Dimensione Formato  
AllSkySearch_PeriodicGW_O1_PhysRevD.96.062002.pdf

solo utenti autorizzati

Descrizione: Articolo principale
Tipologia: Versione editoriale
Licenza: Copyright dell'editore
Dimensione 4.13 MB
Formato Adobe PDF
4.13 MB Adobe PDF   Visualizza/Apri   Richiedi una copia
PhysRevD.96.062002-accepted.pdf

accesso aperto

Tipologia: Versione referata/accettata
Licenza: Creative commons
Dimensione 3.23 MB
Formato Adobe PDF
3.23 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11576/2649909
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 67
  • ???jsp.display-item.citation.isi??? 64
social impact