Formation of the double neutron star system PSR J1930–1852
- Department of Astronomy, Nanjing University, Nanjing 210023 (China)
The spin period (185 ms) and period derivative (1.8×10{sup −17} s s{sup −1}) of the recently discovered double neutron star (DNS) system PSR J1930–1852 indicate that the pulsar was mildly recycled through the process of Roche-lobe overflow. This system has the longest orbital period (45 days) of the known DNS systems, and can be formed from a helium star-NS binary if the initial mass of the helium star was ≲4.0M{sub ⊙}; otherwise, the helium star would never fill its Roche-lobe. At the moment of the supernova explosion, the mass of the helium star was ≲3.0M{sub ⊙}. We find that the probability distribution of the velocity kick imparted to the new-born neutron star has a maximum at about 30 km s{sup −1} (and a tail up to 260 km s{sup −1}), indicating that this NS probably received a low kick velocity at birth.
- OSTI ID:
- 22882318
- Journal Information:
- Astrophysical Journal, Vol. 816, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Since 2009, the country of publication for this journal is the UK.; ISSN 0004-637X
- Country of Publication:
- United Kingdom
- Language:
- English
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