On 2019 April 25, the LIGO/Virgo Scientific Collaboration detected a compact binary coalescence, GW190425. Under the assumption of the binary neutron star (BNS), the total mass of 3.4^{+0.3}_{-0.1}\, M_\odot lies five standard deviations away from the known Galactic population mean. In the standard common envelope scenario, the immediate progenitor of... Show more