On the formation history of Galactic double neutron stars

Vigna-Gocmez, A. and Neijssel, C.J. and Stevenson, S. and Barrett, J.W. and Belczynski, K. and Szécsi, Dorottya (2018) On the formation history of Galactic double neutron stars. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 481 (3). pp. 4009-4029. ISSN 0035-8711

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Abstract

Double neutron stars (DNSs) have been observed as Galactic radio pulsars, and the recent discovery of gravitational waves from the DN merger GW170817 adds to the known DNS population. We perform rapi population synthesis of massive binary stars and discuss mode predictions, including DNS formation rates, mass distributions, an delay time distributions. We vary assumptions and parameters of physica processes such as mass transfer stability criteria, supernova natal kic distributions, remnant mass prescriptions, and common-envelop eccentricity distribution of the Galactic DNS population under each o our population synthesis models, allowing us to quantitatively compar burning secondary (case BB) on to a neutron star is most likel dynamically stable. We also find that a natal kick distribution compose of both low (Maxwellian σ =30 km s^{-1}) and high (σ =265 km s^{-1} components is preferred over a single high-kick component. We conclud that the observed DNS mass distribution can place strong constraints o model assumptions

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