Improved limits on a stochastic gravitational-wave background and its anisotropies from Advanced LIGO O1 and O2 runs

Abstract

We integrate the entire, publicly available, Advanced LIGO (ALIGO) data set to obtain maximum-likelihood constraint maps of the Stochastic Gravitational-Wave Background (SGWB). From these we derive limits on the energy density of the stochastic background ${\Omega }_{\mathrm{GW}}$, and its anisotropy. We find 95% confident limits ${\Omega }_{\mathrm{GW}}<5.2\times 10^{-8}$ at $50$ Hz for a spectral index $\alpha =2/3$ consistent with a stochastic background due to inspiral events and ${\Omega }_{\mathrm{GW}}<3.2\times 10^{-7}$ for a scale (frequency) invariant spectrum. We also report upper limits on the angular power spectra $C_{\ell }$ for three broadband integrations of the data. Finally we present an estimate where we integrate the data into ten separate spectral bins as a first attempt to carry out a model-independent estimate the SGWB and its anisotropies.

arXiv comment9 pages, 8 figures

References in corpus (32)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• GW170104: Observation of a 50-Solar-Mass Binary Black Hole Coalescence at Redshift 0.2
• GW170814: A Three-Detector Observation of Gravitational Waves from a Binary Black Hole Coalescence
• Laser Interferometer Space Antenna
• Binary Black Hole Mergers in the first Advanced LIGO Observing Run
• Cosmological Backgrounds of Gravitational Waves
• Detecting a stochastic background of gravitational radiation: Signal processing strategies and sensitivities
• Gravitational-wave sensitivity curves
• The stochastic gravitational-wave background from massive black hole binary systems: implications for observations with Pulsar Timing Arrays
• An Upper Limit on the Stochastic Gravitational-Wave Background of Cosmological Origin
• Stochastic Gravitational Wave Backgrounds
• The astrophysical gravitational wave stochastic background
• Radical Compression of Cosmic Microwave Background Data
• GW170817: Implications for the Stochastic Gravitational-Wave Background from Compact Binary Coalescences
• Digging deeper: Observing primordial gravitational waves below the binary black hole produced stochastic background
• Detection of Anisotropies in the Gravitational-Wave Stochastic Background
• Searching for a Stochastic Background of Gravitational Waves with LIGO
• Identification and mitigation of narrow spectral artifacts that degrade searches for persistent gravitational waves in the first two observing runs of Advanced LIGO
• Directional limits on persistent gravitational waves from Advanced LIGO's first observing run
• Anisotropy of the astrophysical gravitational wave background: analytic expression of the angular power spectrum and correlation with cosmological observations
• Anisotropies of Gravitational Wave Backgrounds: A Line Of Sight Approach
• Probing the anisotropies of a stochastic gravitational-wave background using a network of ground-based laser interferometers
• Directional limits on persistent gravitational waves using LIGO S5 science data
• First predictions of the angular power spectrum of the astrophysical gravitational wave background
• A radiometer for stochastic gravitational waves
• Gravitational wave radiometry: Mapping a stochastic gravitational wave background
• Relic Gravitational Waves and Limits on Inflation
• Mapping Incoherent Gravitational Wave Backgrounds
• Very fast stochastic gravitational wave background map making using folded data
• Fast Gravitational Wave Radiometry using Data Folding
• Gravitational Wave Background Sky Maps from Advanced LIGO O1 Data

Cited by in corpus (32)

• Upper Limits on the Isotropic Gravitational-Wave Background from Advanced LIGO's and Advanced Virgo's Third Observing Run
• New Horizons for Fundamental Physics with LISA
• Anisotropies and non-Gaussianity of the Cosmological Gravitational Wave Background
• Probing Anisotropies of the Stochastic Gravitational Wave Background with LISA
• Search for anisotropic gravitational-wave backgrounds using data from Advanced LIGO and Advanced Virgo's first three observing runs
• Characterizing the Cosmological Gravitational Wave Background Anisotropies and non-Gaussianity
• Shouts and Murmurs: Combining Individual Gravitational-Wave Sources with the Stochastic Background to Measure the History of Binary Black Hole Mergers
• Gravitational Wave Anisotropies from Primordial Black Holes
• Gravitational Wave Pathway to Testable Leptogenesis
• The $N_{\ell }$ of gravitational wave background experiments
• Maximum likelihood map-making with the Laser Interferometer Space Antenna
• Irreducible background of gravitational waves from a cosmic defect network: update and comparison of numerical techniques
• Searching for anisotropy in the distribution of binary black hole mergers
• All-sky, all-frequency directional search for persistent gravitational-waves from Advanced LIGO's and Advanced Virgo's first three observing runs
• Measuring angular N-point correlations of binary black hole merger gravitational-wave events with hierarchical Bayesian inference
• Unified mapmaking for an anisotropic stochastic gravitational wave background
• Upper limits on persistent gravitational waves using folded data and the full covariance matrix from Advanced LIGO${}^{\prime }$s first two observing runs
• Naturally small neutrino mass with asymptotic safety and gravitational-wave signatures
• Targeted search for the stochastic gravitational-wave background from the galactic millisecond pulsar population
• Angular Resolution of the Search for Anisotropic Stochastic Gravitational-Wave Background with Terrestrial Gravitational-Wave Detectors
• Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
• Jointly setting upper limits on multiple components of an anisotropic stochastic gravitational-wave background
• Angular power spectra of anisotropic stochastic gravitational wave background: developing statistical methods and analyzing data from ground-based detectors
• Projections of the uncertainty on the compact binary population background using popstock
• All-sky analysis of astrochronometric signals induced by gravitational waves
• Model-independent search for anisotropies in stochastic gravitational-wave backgrounds and application to LIGO-Virgo's first three observing Runs
• Unbiased estimation of gravitational-wave anisotropies from noisy data
• Gravitational-wave searches in the era of Advanced LIGO and Virgo
• Estimating the gravitational wave background anisotropy: a Bayesian approach boosted by cross-correlation angular power spectrum
• Stochastic gravitational wave background due to core collapse resulting in neutron stars
• Comparison of maximum likelihood mapping methods for gravitational-wave backgrounds
• Model-agnostic gravitational-wave background characterization algorithm