A wide variety of astrophysical and cosmological sources are expected to contribute to a stochastic gravitational-wave background. Following the observations of GW150914 and GW151226, the rate and mass of coalescing binary black holes appear to be greater than many previous expectations. As a result, the stochastic background from unresolved compact binary coalescences is expected to be particularly loud. We perform a search for the isotropic stochastic gravitational-wave background using data from Advanced Laser Interferometer Gravitational Wave Observatory’s (aLIGO) first observing run. The data display no evidence of a stochastic gravitational-wave signal. We constrain the dimensionless energy density of gravitational waves to be Ω0 < 1.7 × 10−7 with 95% confidence, assuming a flat energy density spectrum in the most sensitive part of the LIGO band (20–86 Hz). This is a factor of ∼33 times more sensitive than previous measurements. We also constrain arbitrary power-law spectra. Finally, we investigate the implications of this search for the background of binary black holes using an astrophysical model for the background.

Abbott, B. ., Abbott, R., Abbott, T. ., Abernathy, M. ., Acernese, F., Ackley, K., et al. (2017). Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO’s First Observing Run. PHYSICAL REVIEW LETTERS, 118(12), 121101-1-121101-12 [10.1103/PhysRevLett.118.121101].

Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO’s First Observing Run

BRANCHESI, MARICA;CERBONI BAIARDI, LORENZO;Cuoco, E.;GRECO, GIUSEPPE;GUIDI, GIANLUCA MARIA;MONTANI, MATTEO;PIERGIOVANNI, FRANCESCO;VICERE', ANDREA;
2017

Abstract

A wide variety of astrophysical and cosmological sources are expected to contribute to a stochastic gravitational-wave background. Following the observations of GW150914 and GW151226, the rate and mass of coalescing binary black holes appear to be greater than many previous expectations. As a result, the stochastic background from unresolved compact binary coalescences is expected to be particularly loud. We perform a search for the isotropic stochastic gravitational-wave background using data from Advanced Laser Interferometer Gravitational Wave Observatory’s (aLIGO) first observing run. The data display no evidence of a stochastic gravitational-wave signal. We constrain the dimensionless energy density of gravitational waves to be Ω0 < 1.7 × 10−7 with 95% confidence, assuming a flat energy density spectrum in the most sensitive part of the LIGO band (20–86 Hz). This is a factor of ∼33 times more sensitive than previous measurements. We also constrain arbitrary power-law spectra. Finally, we investigate the implications of this search for the background of binary black holes using an astrophysical model for the background.
2017
Abbott, B. ., Abbott, R., Abbott, T. ., Abernathy, M. ., Acernese, F., Ackley, K., et al. (2017). Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO’s First Observing Run. PHYSICAL REVIEW LETTERS, 118(12), 121101-1-121101-12 [10.1103/PhysRevLett.118.121101].
Abbott, B.  .p.; Abbott, R.; Abbott, T.  .d.; Abernathy, M.  .r.; Acernese, F.; Ackley, K.; Adams, C.; Adams, T.; Addesso, P.; Adhikari, R.  .x.; Adya...espandi
File in questo prodotto:
Eventuali allegati, non sono esposti

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/11585/865922
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 228
  • ???jsp.display-item.citation.isi??? 237
social impact