The evolutionary status of the white dwarf companion of the binary pulsar PSR J1713+0747

BENVENUTO, O. G.; ROHRMANN, R. D.; DE VITO, M. A.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY

Blackwell Publishing

Lugar: Londres; Año: 2006 vol. 366 p. 1520 - 1528

0035-8711

Recently Splaver et al. have measured the masses of the white dwarf and the neutron star (NS) components of the PSR J1713+0747 binary system pair by means of the general relativistic effect known as Shapiro delay with very high accuracy. Employing these data we attempt to find the original configuration that evolved to the observed system. For this purpose we perform a set of binary evolution calculations trying to simultaneously account for the masses of both stars and the orbital period. In doing so, we considered normal (donor) stars with an initial mass of 1.5 M_solar, while for the neutron star companion we assumed a mass of 1.4 M_solar. We assumed two metallicity values for the donor star (Z= 0.010 and 0.020) and that the initial orbital period was nearly 3d. In order to get a good agreement between the masses of the models and observations we had to assume that the NS is only able to retain