Based on the function of the accretion induced magnetic decay,the analytical relationship between the magnetic field B and spin period P of a millisecond pulsar(MSP)is investigated,from which the minimum spin period o...Based on the function of the accretion induced magnetic decay,the analytical relationship between the magnetic field B and spin period P of a millisecond pulsar(MSP)is investigated,from which the minimum spin period of about one millisecond can be obtained.With this minimum spin period,the range of the neutron star(NS)radius is constrained in comparison with the measured spin period of MSP.Furthermore,we also study the relation between the spin period and the accretion massΔM of the NS,and find that the minimum spin period is achieved with the accretion mass of about-0.2M⊙,while the bottom magnetic field of about 108 G is obtained.展开更多
The neutron star motions are based on the undisturbed finitely thick galactic disk gravitational potential model. Two initial conditions, i.e. the locations and velocities, are considered. The Monte Carlo method is em...The neutron star motions are based on the undisturbed finitely thick galactic disk gravitational potential model. Two initial conditions, i.e. the locations and velocities, are considered. The Monte Carlo method is employed to separate rich diversities of the orbits of neutron stars into several sorts. The Poineare section has the potential to play an important role in the diagnosis of the neutron star motion. It has been observed that the increasing ratio of the motion range vertical to the galactic plane to that parallel to the galactic plane results in the irregularity of neutron star motion.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 11173034the National Basic Research Program of China(2012CB821800).
文摘Based on the function of the accretion induced magnetic decay,the analytical relationship between the magnetic field B and spin period P of a millisecond pulsar(MSP)is investigated,from which the minimum spin period of about one millisecond can be obtained.With this minimum spin period,the range of the neutron star(NS)radius is constrained in comparison with the measured spin period of MSP.Furthermore,we also study the relation between the spin period and the accretion massΔM of the NS,and find that the minimum spin period is achieved with the accretion mass of about-0.2M⊙,while the bottom magnetic field of about 108 G is obtained.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10778611, 10773017, 10973021 and 10573026, and the National Basic Research Program of China under Grant No 2009CB824800.
文摘The neutron star motions are based on the undisturbed finitely thick galactic disk gravitational potential model. Two initial conditions, i.e. the locations and velocities, are considered. The Monte Carlo method is employed to separate rich diversities of the orbits of neutron stars into several sorts. The Poineare section has the potential to play an important role in the diagnosis of the neutron star motion. It has been observed that the increasing ratio of the motion range vertical to the galactic plane to that parallel to the galactic plane results in the irregularity of neutron star motion.
