Coalescing Binary Neutron Star Systems Under a Three-Dimension Gravitational-Wave Detector

Liu, Mengxu

The detection of GW170817 has stimulated multi-messenger searching GW signals and electromagnetic (EM) counterparts. A joint GW/EM investigation of coalescing binary neutron star systems could yield fruit in both fundamental physics and astronomy. However, the current L-shaped interferometers can only provide limited position information, which is still a challenge to the joint detection with EM telescope. Here we propose a three-dimensional (3-D) laser interferometer detector in the shape of a regular triangular pyramid. Compared with the traditional L-shaped interferometers, such a 3-D detector has a number of merits, like getting rid of the signal-like noise events, a more extended field of view and much stronger constraints on parameters of GW sources. Therefore, the joint GW/EM investigation of coalescing binary neutron star systems may become more efficient and fruitful than before.