演講資訊

摘要：

Pulsars are fast-rotating neutron stars with strong magnetic fields. Magnetars are an extreme group of pulsars with extraordinarily strong magnetic fields of $10^{14}$--$10^{15}$ G, and remarkable for the bursting activities and high X-ray luminosities powered by their high magnetic field. However, recent discoveries blurred the boundary between magnetars and rotation-powered pulsars (RPPs). In this talk, I will introduce the recent works on the high-magnetic-field RPPs, especially the youngest ones of J1846-0258, J1119-6127, and B1509-58. Young and high-magnetic-field RPPs have surface temperatures between the magnetars and canonical RPPs, indicating that high-magnetic-field RPPs are potential bursters and may contain toroidal magnetic fields according to the magneto-thermal evolution model. This model implies that the toroidal field could play an important role in bursting rate and the temperature anisotropic. Our recent work on the statistics of magnetars' pulse profiles agreed on this indication well. Finally, I will introduce the possible connection between the magnetars and the accreting pulsars in ultraluminous X-ray sources. Strong toroidal or multi-polar magnetic fields are necessary to interpret the high luminosities and the observed spin-up rates, indicating that ultraluminous pulsars are probably powered by magnetars.