Distinguishing gravity theories with networks of space-based gravitational-wave detectors

Abstract

We propose a method for separating and detecting the non-tensor modes of stochastic gravitational-wave backgrounds (SGWBs) using networks of space-based gravitational-wave detectors. We consider four distinct data-reconstruction schemes for the co-inclination and anti-inclination orbital configurations of the LISA-Taiji network. We find that the co-inclination configuration offers its advantages over the anti-inclination one and can achieve signal-to-noise ratios up to 17.3 for the vector modes and 10.4 for the scalar modes with the energy density spectrum as ${\Omega }_{GW}^p(f)=10^{-12}$. Our method can be used to measure beyond-general-relativity polarization modes of SGWBs at mHz frequency band, opening a new avenue for testing alternative gravity theories.

18 pages, 4 figures

References in corpus (28)

• The Confrontation between General Relativity and Experiment
• The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
• Search for an isotropic gravitational-wave background with the Parkes Pulsar Timing Array
• Searching for the nano-Hertz stochastic gravitational wave background with the Chinese Pulsar Timing Array Data Release I
• The second data release from the European Pulsar Timing Array III. Search for gravitational wave signals
• The recent gravitational wave observation by pulsar timing arrays and primordial black holes: the importance of non-gaussianities
• The LISA-Taiji network
• Probing the equation of state of the early Universe with pulsar timing arrays
• The nanohertz stochastic gravitational wave background from cosmic string loops and the abundant high redshift massive galaxies
• The Detected Stochastic Gravitational Waves and Subsolar-Mass Primordial Black Holes
• Implications of Pulsar Timing Array Data for Scalar-Induced Gravitational Waves and Primordial Black Holes: Primordial Non-Gaussianity $f_{\mathrm{NL}}$ Considered
• Superheavy quasi-stable strings and walls bounded by strings in the light of NANOGrav 15 year data
• Constraints on primordial curvature power spectrum with pulsar timing arrays
• Confronting sound speed resonance with pulsar timing arrays
• Gravitational Wave Astronomy With TianQin
• Gravitational wave background from rotating neutron stars
• Simultaneously probing the sound speed and equation of state of the early Universe with pulsar timing arrays
• Scalar induced gravity waves from ultra slow-roll Galileon inflation
• Characterization of Time Delay Interferometry combinations for the LISA instrument noise
• Implication of nano-Hertz stochastic gravitational wave on dynamical dark matter through a dark first-order phase transition
• Probing the speed of scalar-induced gravitational waves with pulsar timing arrays
• Primordial non-Gaussianity as a saviour for PBH overproduction in SIGWs generated by Pulsar Timing Arrays for Galileon inflation
• Gravitational Wave Background Search by Correlating Multiple Triangular Detectors in the mHz Band
• Unraveling the early universe's equation of state and primordial black hole production with PTA, BBN, and CMB observations
• On the impact of a concave nosed axisymmetric body on a free surface
• Impact of combinations of time-delay interferometry channels on stochastic gravitational wave background detection
• Forecast Analysis of Astrophysical Stochastic Gravitational Wave Background beyond general relativity: A Case Study on Brans-Dicke Gravity
• Density effect on multi-wavelength luminosities on star formation regions in NGC 3184 and NGC 3938