Joint observations of space-based gravitational-wave detectors: Source localization and implications for parity-violating gravity

Space-based gravitational-wave (GW) detectors, including LISA, Taiji and TianQin, are able to detect mHz GW signals produced by mergers of supermassive black hole binaries, which opens a new window for astronomy. In this article, we numerically estimate the potential capabilities future networks multiple space-based detectors using Bayesian analysis. We modify public package bilby employ sampler pymultinest analyze simulated data detector networks, investigate their abilities source localization testing parity symmetry gravity. comparison with case an individual detector, find can significantly improve localization. While constraining gravity, that follow similar constraints on parity-violating energy scale ${M}_{\mathrm{PV}}$. Similar analysis be applied other observations various detectors.