Ability of LISA to detect a gravitational-wave background of cosmological origin: the cosmic string case

Abstract

We investigate the ability of the Laser Interferometer Space Antenna (LISA) to detect a stochastic gravitational-wave background (GWB) produced by cosmic strings, and to subsequently estimate the string tension $G\mu$ in the presence of instrument noise, an astrophysical background from compact binaries, and the galactic foreground from white dwarf binaries. Fisher Information and Markov Chain Monte Carlo methods provide estimates of the LISA noise and the parameters for the different signal sources. We demonstrate the ability of LISA to simultaneously estimate the galactic foreground, as well as the astrophysical and cosmic string produced backgrounds. Considering the expected astrophysical background and a galactic foreground, a cosmic string tension in the $G\mu \approx 10^{-16}$ to $G\mu \approx 10^{-15}$ range or bigger could be measured by LISA, with the galactic foreground affecting this limit more than the astrophysical background. The parameter estimation methods presented here can be applied to other cosmological backgrounds in the LISA observation band.

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Cited by in corpus (28)

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• Uncovering gravitational-wave backgrounds from noises of unknown shape with LISA
• Prospects for LISA to detect a gravitational-wave background from first order phase transitions
• Stochastic gravitational wave background: methods and Implications
• Primordial Black Holes from Conformal Higgs
• Impact of LIGO-Virgo black hole binaries on gravitational wave background searches
• Prospects for Taiji to detect a gravitational-wave background from cosmic strings
• Precision cosmology with primordial GW backgrounds in presence of astrophysical foregrounds
• Unraveling Cosmological Anisotropies within Stochastic Gravitational Wave Backgrounds
• Bubbletrons: Ultrahigh-Energy Particle Collisions and Heavy Dark Matter at Phase Transitions
• Formalism for power spectral density estimation for non-identical and correlated noise using the null channel in Einstein Telescope
• White dwarf binary modulation can help stochastic gravitational wave background search
• Cosmological Consequences of Domain Walls Biased by Quantum Gravity
• Reference frames in General Relativity and the galactic rotation curves
• Dictionary learning: a novel approach to detecting binary black holes in the presence of Galactic noise with LISA
• Figures of merit for a stochastic gravitational-wave background measurement by LISA: implications of LISA Pathfinder noise correlations
• Detecting a Gravitational-Wave Background from Inflation with Null Energy Condition Violation: Prospects for Taiji
• Assessing the Impact of Unequal Noises and Foreground Modeling on SGWB Reconstruction with LISA
• Influence of a cosmic string on the rate of pairs produced by the Coulomb potential
• The LISA forecast on a smooth crossover beyond the Standard Model through the scalar-induced gravitational waves
• LISA Galactic Binaries in the Roman Galactic Bulge Time-Domain Survey
• Probing cosmic strings via gravitational-wave lensing
• Detecting stochastic gravitational wave background from cosmic strings with next-generation detector networks: Component separation based on a multi-source astrophysical foreground noise model
• Searching Stochastic Gravitational Wave Background Landscape Across Frequency Bands