Alternative LISA-TAIJI networks

Abstract

The space-borne gravitational wave (GW) detectors, LISA and TAIJI, are planned to be launched in the 2030s. The dual detectors with comparable sensitivities will form a network observing GW with significant advantages. In this work, we investigate the three possible LISA-TAIJI networks for the different location and orientation compositions of LISA orbit (+60 • inclination and trailing the Earth by 20 • ) and alternative TAIJI orbit configurations including TAIJIp (+60 • inclination and leading the Earth by 20 • ), TAIJIc (+60 • inclination and co-located with LISA), TAIJIm (−60 • inclination and leading the Earth by 20 • ). In the three LISA-TAIJI configurations, the LISA-TAIJIm network shows the best performance on the sky localization and polarization determination for the massive binary system due to their better complementary antenna pattern, and LISA-TAIJIc could achieve the best cross-correlation and observe the stochastic GW background with an optimal sensitivity.