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The simulation of the magnetic field and spin period evolution of accreting neutron stars
Author(s) -
Pan Y. Y.,
Song L. M.,
Zhang C. M.,
Guo Y. Q.
Publication year - 2015
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.201412168
Subject(s) - physics , accretion (finance) , astrophysics , neutron star , magnetic field , stars , field (mathematics) , pulsar , mathematics , quantum mechanics , pure mathematics
By means of the Monte Carlo method, we simulate the evolutionary distribution of accreting neutron stars (NSs) in the magnetic field versus spin period ( B‐P ) diagram where the accretion induced magnetic‐field decay model is exploited. The simulated results show that by mass accretion the B‐P distribution of the accreting NS would evolve along the equilibrium period line to a region with low field and short period. The B‐P distributions of the simulated accreting NSs are consistent with those of the observed millisecond pulsars (MSPs) after accretion of ∼ 0.1–0.2 M⊙. We also test the effects of the initial magnetic field and the spin period on the evolved B‐P distribution of the accreting NSs. It is shown that the evolved distributions of the simulated samples are independent of the selection of the initial condition when the NS magnetic field decays to a value less than ∼10 10 G. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)