On networks of space-based gravitational-wave detectors

TL;DR

This paper reviews the potential and advantages of networks of space-based gravitational-wave detectors like LISA, Taiji, and TianQin, emphasizing their improved capabilities in sky localization, testing fundamental physics, and astrophysical observations.

Contribution

It provides a comprehensive overview of the scientific benefits and trade-offs of joint space-based GW detector networks, highlighting recent studies and potential alternative configurations.

Findings

High precision sky localization for binary black hole mergers

Enhanced testing of parity violation in stochastic GW background

Improved stellar-mass binary black hole observations

Abstract

The space-based laser interferometers, LISA, Taiji and TianQin, are targeting to observe milliHz gravitational waves (GWs) in the 2030s. The joint observations from multiple space-based detectors yield significant advantages. In this work, we recap the studies and investigations for the joint space-based GW detector networks to highlight: 1) the high precision of sky localization for the massive binary black hole (BBH) coalescences and the GW sirens in the cosmological implication, 2) the effectiveness to test the parity violation in the stochastic GW background observations, 3) the efficiency of subtracting galactic foreground, 4) the improvement in stellar-mass BBH observations. We inspect alternative networks by trading off massive BBH observations and stochastic GW background observation.