Alternative LISA-TAIJI networks
G. Wang, Wei-Tou Ni, Wen-Biao Han, Peng Xu, Ziren Luo
Abstract
The spaceborne 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 GWs with significant advantages. In this work, we investigate the three possible LISA-TAIJI networks for the different location and orientation compositions of the LISA orbit ($+60\ifmmode^\circ\else\textdegree\fi{}$ inclination and trailing the Earth by 20\ifmmode^\circ\else\textdegree\fi{}) and alternative TAIJI orbit configurations, including TAIJIp ($+60\ifmmode^\circ\else\textdegree\fi{}$ inclination and leading the Earth by 20\ifmmode^\circ\else\textdegree\fi{}), TAIJIc ($+60\ifmmode^\circ\else\textdegree\fi{}$ inclination and colocated with LISA), and TAIJIm ($\ensuremath{-}60\ifmmode^\circ\else\textdegree\fi{}$ inclination and leading the Earth by 20\ifmmode^\circ\else\textdegree\fi{}). Of the three LISA-TAIJI configurations, the LISA-TAIJIm network shows the best performance in the sky localization and polarization determination for massive binary systems due to its better complementary antenna pattern, and LISA-TAIJIc could achieve the best cross-correlation and observe the stochastic GW background with optimal sensitivity.