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摘要
Recently similar to 2M(circle dot) neutron stars PSR J1614-2230 and PSR J0348+0432 have been observed in neutron star-white dwarf binaries. These observations ruled out many neutron star equations of states with which the maximum neutron star mass becomes less than 2M(circle dot). On the other hand, all well-measured neutron star masses in double neutron star binaries are still less than 1.5M(circle dot). In this article we suggest that 2M(circle dot) neutron stars in neutron star-white dwarf binaries are the result of the supercritical accretion onto the first-born neutron star during the evolution of the binary progenitors.
- 出版日期2014-8
