Heng-Hao Chen (National Tsing-Hua University); Meng-Ru Wu (Institute of Physics, Academia Sinica)
The observation of double neutron star mergers (NSM) via their gravitational wave and electromagnetic emission provide strong evidence that these events play an important role in producing the r-process elements. However, unlike most supernovae taking place near the Galactic plane, the position of NSM and their remnants may locate at high Galactic latitudes due to the imparted NS natal kick. Future detection of the decay γ-ray lines from the NSM remnants in the Milky Way (MW) may therefore provide clues about the formation of double neutron star systems. In this on-going work, we compute the spatial distribution of the NSM merger remnants in the MW by utilizing the open-source code Galpy capable of computing the trajectories of moving bodies under the MW potential. We investigate the dependence of the NSM remnant distribution on the magnitude of the NS natal kick velocity.