Parkes observations for project P885 semester 2016OCTS

We propose to observe 1E 1547.0-5408 weekly, one of two magnetars\r\nknown to currently emit radio pulsations, to track its rotation,\r\nflux density, and polarisation. Less frequently we will monitor\r\nPSR J1622-4950 and XTE J1810-197, which used to emit radio pulsations,\r\nto be on the lookout for their revival. After years with unsteady\r\nradio emission, 1E 1547.0-5408 is now detected 100% of the time,\r\nallowing us to obtain a continuous record of its torque which\r\nilluminates the continued release of magnetic energy in the neutron\r\nstar. Our broader aims are to develop a better understanding of\r\nthe dynamical behaviour of magnetar magnetospheres, and to establish\r\nthe conditions under which radio emission takes place therein, in\r\naddition to characterising their variable radio emission in order\r\nto place constraints on the emission mechanisms, which in at least\r\nsome respects differ from those of ordinary pulsars.

本研究提议对目前已知的两颗仍在发射射电脉冲的磁星（magnetar）之一——1E 1547.0-5408开展每周一次的观测，以追踪其自转特性、流量密度与偏振状态。我们将以更低频次对曾发射射电脉冲的PSR J1622-4950与XTE J1810-197进行监测，以留意其脉冲辐射的复苏迹象。在经历多年不稳定的射电辐射阶段后，1E 1547.0-5408目前始终可被稳定探测到，这使得我们能够获取其自转扭矩的连续观测记录，进而阐明中子星内部持续释放磁能的物理过程。本研究更广泛的目标在于深化对磁星磁层动力学行为的认知，明确射电辐射在磁星磁层中产生的具体条件；同时对磁星多变的射电辐射特性进行表征，以此为其辐射机制设定约束条件，而这类辐射机制至少在某些方面与普通脉冲星的辐射机制存在差异。