Detecting stochastic gravitational wave background from cosmic strings with next-generation detector networks: Component separation based on a multi-source astrophysical foreground noise model

Abstract

Detecting stochastic gravitational wave background (SGWB) from cosmic strings is crucial for unveiling the evolutionary laws of the early universe and validating non-standard cosmological models. This study presents the first systematic evaluation of the detection capabilities of next-generation ground-based gravitational wave detector networks for cosmic strings. By constructing a hybrid signal model incorporating multi-source astrophysical foreground noise, including compact binary coalescences (CBCs) and compact binary hyperbolic encounters (CBHEs), we propose an innovative parameter estimation methodology based on multi-component signal separation. Numerical simulations using one-year observational data reveal three key findings: (1) The CE4020ET network, comprising the Einstein Telescope (ET-10 km) and the Cosmic Explorer (CE-40 km and CE-20 km), achieves nearly one order of magnitude improvement in constraining the cosmic string tension $G\mu$ compared to individual detectors, reaching a relative uncertainty $\Delta G\mu /G\mu <0.5$ for $G\mu >3.5\times 10^{-15}$ under standard cosmological framework; (2) The network demonstrates enhanced parameter resolution in non-standard cosmological scenarios, providing a novel approach to probe pre-Big Bang Nucleosynthesis cosmic evolution; (3) Enhanced detector sensitivity amplifies CBHE foreground interference in parameter estimation, while precise modeling of such signals could further refine $G\mu$ constraints by $1-2$ orders of magnitude. This research not only quantifies the detection potential of third-generation detector networks for cosmic string models but also elucidates the intrinsic connection between foreground modeling precision and cosmological parameter estimation accuracy, offering theoretical foundations for optimizing scientific objectives of next-generation gravitational wave observatories.

16 pages, 9 figures; accepted for publication in Physical Review D

References in corpus (84)

• emcee: The MCMC Hammer
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Advanced LIGO
• TianQin: a space-borne gravitational wave detector
• A gravitational-wave standard siren measurement of the Hubble constant
• Sensitivity Studies for Third-Generation Gravitational Wave Observatories
• Interferometer design of the KAGRA gravitational wave detector
• Cosmological Backgrounds of Gravitational Waves
• Physics, Astrophysics and Cosmology with Gravitational Waves
• Gravitational waves from the sound of a first order phase transition
• Sensitivity curves for searches for gravitational-wave backgrounds
• Gravitational radiation from cosmic (super)strings: bursts, stochastic background, and observational windows
• Gravitational waves from scattering of stellar-mass black holes in galactic nuclei
• Upper Limits on the Isotropic Gravitational-Wave Background from Advanced LIGO's and Advanced Virgo's Third Observing Run
• The promise of multi-band gravitational wave astronomy
• Science with the Einstein Telescope: a comparison of different designs
• Cosmology with the Laser Interferometer Space Antenna
• The number of cosmic string loops
• Gauge Field Production in Axion Inflation: Consequences for Monodromy, non-Gaussianity in the CMB, and Gravitational Waves at Interferometers
• Gravitational wave stochastic background from cosmic (super)strings
• Stochastic Gravitational Wave Backgrounds
• Probing the early universe with inflationary gravitational waves
• Probing the gravitational wave background from cosmic strings with LISA
• Gravitational-Wave Stochastic Background from Kinks and Cusps on Cosmic Strings
• The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe
• Stochastic gravitational wave background from smoothed cosmic string loops
• 4-OGC: Catalog of gravitational waves from compact-binary mergers
• Relating gravitational wave constraints from primordial nucleosynthesis, pulsar timing, laser interferometers, and the CMB: implications for the early universe
• Constraints on cosmic strings using data from the third Advanced LIGO-Virgo observing run
• New limits on cosmic strings from gravitational wave observation
• Constraints on cosmic string tension imposed by the limit on the stochastic gravitational wave background from the European Pulsar Timing Array
• Constraints on cosmic strings using data from the first Advanced LIGO observing run
• Digging deeper: Observing primordial gravitational waves below the binary black hole produced stochastic background
• Probing the pre-BBN universe with gravitational waves from cosmic strings
• Beyond the Standard Models with Cosmic Strings
• Cosmic Archaeology with Gravitational Waves from Cosmic Strings
• On the gravitational wave background from compact binary coalescences in the band of ground-based interferometers
• Forecasting the detection capabilities of third-generation gravitational-wave detectors using $\text{GWFAST}$
• Stochastic Gravitational Wave Background from Cosmological Supernovae
• Accessibility of the Gravitational-Wave Background due to Binary Coalescences to Second and Third Generation Gravitational-Wave Detectors
• Detection Rate Estimates of Gravity-waves Emitted During Parabolic Encounters of Stellar Black Holes in Globular Clusters
• Stochastic gravitational waves from cosmic string loops in scaling
• Multi-band gravitational-wave astronomy: parameter estimation and tests of general relativity with space and ground-based detectors
• Stochastic Gravitational Wave Background from Light Cosmic Strings
• Anisotropies in the stochastic gravitational-wave background: Formalism and the cosmic string case
• Analytic Study of Small Scale Structure on Cosmic Strings
• Stochastic Gravitational Wave Background generated by Cosmic String Networks: Velocity-Dependent One-Scale model versus Scale-Invariant Evolution
• Imprint of the merger and ring-down on the gravitational wave background from black hole binaries coalescence
• Subtracting compact binary foreground sources to reveal primordial gravitational-wave backgrounds
• $D$-term inflation, cosmic strings, and consistency with cosmic microwave background measurement
• Stochastic Gravitational Wave Background from Global Cosmic Strings
• Full analytical approximation to the stochastic gravitational wave background generated by cosmic string networks
• How to simulate global cosmic strings with large string tension
• Forecast constraints on cosmic string parameters from gravitational wave direct detection experiments
• Gravitational wave energy emission and detection rates of Primordial Black Hole hyperbolic encounters
• Listening to the Universe with Next Generation Ground-Based Gravitational-Wave Detectors
• A Mock Data and Science Challenge for Detecting an Astrophysical Stochastic Gravitational-Wave Background with Advanced LIGO and Advanced Virgo
• Gravitational wave energy spectrum of hyperbolic encounters
• Gravitational waves from hyperbolic encounters
• Gravitational wave bursts from Primordial Black Hole hyperbolic encounters
• Simultaneous estimation of astrophysical and cosmological stochastic gravitational-wave backgrounds with terrestrial detectors
• Searching for cosmological gravitational-wave backgrounds with third-generation detectors in the presence of an astrophysical foreground
• Primordial Black Hole Archaeology with Gravitational Waves from Cosmic Strings
• Signature of inflation in the stochastic gravitational wave background generated by cosmic string networks
• A Systematic Study of the Stochastic Gravitational-Wave Background due to Stellar Core Collapse
• Ability of LISA to detect a gravitational-wave background of cosmological origin: the cosmic string case
• Forecast constraints on cosmic strings from future CMB, pulsar timing and gravitational wave direct detection experiments
• Gravitational Wave observatories may be able to detect hyperbolic encounters of Black Holes
• The stochastic gravitational wave background from close hyperbolic encounters of primordial black holes in dense clusters
• Search for black hole hyperbolic encounters with gravitational wave detectors
• A Model of the Stochastic Gravitational-Wave Background due to Core Collapse to Black Holes
• Subtracting Compact Binary Foregrounds to Search for Subdominant Gravitational-Wave Backgrounds in Next-Generation Ground-Based Observatories
• Direct determination of cosmic string loop density from simulations
• Joint constraints on cosmological parameters using future multi-band gravitational wave standard siren observations
• Detecting cosmological gravitational waves background after removal of compact binary coalescences in future gravitational wave detectors
• pygwb: Python-based library for gravitational-wave background searches
• Gravitational Wave Emission from a Cosmic String Loop, I: Global Case
• Unraveling the early universe's equation of state and primordial black hole production with PTA, BBN, and CMB observations
• Component Separation of a Isotropic Gravitational Wave Background
• The Eccentric and Accelerating Stellar Binary Black Hole Mergers in Galactic Nuclei: Observing in Ground and Space Gravitational Wave Observatories
• Gravitational-Wave Searches for Cosmic String Cusps in Einstein Telescope Data using Deep Learning
• Space-borne atom interferometric gravitational wave detections. Part III. Eccentricity on dark sirens
• Searching for cosmological stochastic backgrounds by notching out resolvable compact binary foregrounds with next-generation gravitational-wave detectors
• Detectability of stochastic gravitational wave background from weakly hyperbolic encounters