Detection of the stochastic gravitational wave background with the space-borne gravitational-wave detector network

Abstract

The stochastic gravitational wave background (SGWB) is one of the main detection targets for future millihertz space-borne gravitational-wave observatories such as the \ac{LISA}, TianQin, and Taiji. For a single LISA-like detector, a null-channel method was developed to identify the SGWB by integrating data from the A and E channels with a noise-only T channel. However, the noise monitoring channel will not be available if one of the laser interferometer arms fails. By combining these detectors, it will be possible to build detector networks to search for SGWB via cross-correlation analysis.In this work, we developed a Bayesian data analysis method based on \ac{TDI} Michelson-type channel. We then investigate the detectability of the TianQin-LISA detector network for various isotropic SGWB. Assuming a three-month observation, the TianQin-LISA detector network could be able to confidently detect SGWB with energy density as low as ${\Omega }_{\mathrm{PL}}=6.0\times 10^{-13}$, ${\Omega }_{\mathrm{Flat}}=2.0\times 10^{-12}$ and ${\Omega }_{\mathrm{SP}}=1.2\times 10^{-12}$ for power-law, flat and single-peak models, respectively.

References in corpus (26)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• The NANOGrav 15-year Data Set: Evidence for a Gravitational-Wave Background
• GW190521: A Binary Black Hole Merger with a Total Mass of $150M_{\odot }$
• 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
• Gravitational-wave sensitivity curves
• Science with the space-based interferometer LISA. IV: Probing inflation with gravitational waves
• Science with the TianQin Observatory: Preliminary results on Galactic double white dwarf binaries
• Science with the TianQin observatory: Preliminary results on stellar-mass binary black holes
• Optimizing orbits for TianQin
• Science with the TianQin observatory: Preliminary result on extreme-mass-ratio inspirals
• Science with the TianQin Observatory: Preliminary Results on Stochastic Gravitational-Wave Background
• Science with the TianQin Observatory: Preliminary Results on Testing the No-hair Theorem with EMRI
• Measuring Parity Violation in the Stochastic Gravitational Wave Background with the LISA-Taiji network
• Detecting a Stochastic Gravitational-Wave Background: The Overlap Reduction Function
• Effect of Earth-Moon's gravity on TianQin's range acceleration noise
• Sensitivity functions for space-borne gravitational wave detectors
• Gravitational Wave Background Search by Correlating Multiple Triangular Detectors in the mHz Band
• Geometric approach for the modified second generation time delay interferometry
• Detecting the stochastic gravitational wave background with the TianQin detector
• Charactering instrumental noises and stochastic gravitational wave signals from combined time-delay interferometry
• Overlap reduction functions for a polarized stochastic gravitational-wave background in the Einstein Telescope-Cosmic Explorer and the LISA-Taiji networks
• Detection prospects for the GW background of Galactic (sub)solar mass primordial black holes