Skip to Main content Skip to Navigation
Journal articles

Directional limits on persistent gravitational waves from Advanced LIGO's first observing run

Abstract : We employ gravitational-wave radiometry to map the stochastic gravitational wave background expected from a variety of contributing mechanisms and test the assumption of isotropy using data from the Advanced Laser Interferometer Gravitational Wave Observatory's (aLIGO) first observing run. We also search for persistent gravitational waves from point sources with only minimal assumptions over the 20-1726 Hz frequency band. Finding no evidence of gravitational waves from either point sources or a stochastic background, we set limits at 90% confidence. For broadband point sources, we report upper limits on the gravitational wave energy flux per unit frequency in the range F_{α,Θ}(f)<(0.1-56)×10^{-8}    erg cm^{-2} s^{-1} Hz^{-1}(f/25  Hz)^{α-1} depending on the sky location Θ and the spectral power index α. For extended sources, we report upper limits on the fractional gravitational wave energy density required to close the Universe of Ω(f,Θ)<(0.39-7.6)×10^{-8}  sr^{-1}(f/25  Hz)^{α} depending on Θ and α. Directed searches for narrowband gravitational waves from astrophysically interesting objects (Scorpius X-1, Supernova 1987 A, and the Galactic Center) yield median frequency-dependent limits on strain amplitude of h_{0}<(6.7,5.5,  and  7.0)×10^{-25}, respectively, at the most sensitive detector frequencies between 130-175 Hz. This represents a mean improvement of a factor of 2 across the band compared to previous searches of this kind for these sky locations, considering the different quantities of strain constrained in each case.
Complete list of metadatas

http://hal.in2p3.fr/in2p3-01412191
Contributor : Claudine Bombar <>
Submitted on : Thursday, December 8, 2016 - 10:16:43 AM
Last modification on : Tuesday, May 26, 2020 - 6:50:44 PM

Links full text

Identifiers

Citation

B.P. Abbott, T. Adams, R. Bonnand, D. Buskulic, M. Ducrot, et al.. Directional limits on persistent gravitational waves from Advanced LIGO's first observing run. Physical Review Letters, American Physical Society, 2017, 118 (12), pp.121102. ⟨10.1103/PhysRevLett.118.121102⟩. ⟨in2p3-01412191⟩

Share

Metrics

Record views

594