Parkes observations for project P885 semester 2018OCTS_15

We propose to observe PSR J1622-4950 and 1E1547.0-5408 weekly, two\r\nof three magnetars known to currently emit radio pulsations, to\r\ntrack their rotation, flux density, and polarisation. Less frequently\r\nwe will monitor XTE J1810-197, which used to emit radio pulsations,\r\nto be on the lookout for its revival - as recently happened with PSR\r\nJ1622-4950, which turned on in 2017 after more than 2 years dormant!\r\nThese observations yield a continuous record of torque, illuminating\r\nthe continued release of magnetic energy. Our broader aims are to\r\ndevelop a better understanding of the dynamical behaviour of magnetar\r\nmagnetospheres, and to establish the conditions under which radio\r\nemission takes place therein, in addition to characterising their\r\nvariable radio emission in order to place constraints on the emission\r\nmechanisms, which in at least some respects differ from those of\r\nordinary pulsars.

我们提议对当前已知的3颗可发射射电脉冲的磁星（magnetar）中的两颗——脉冲星PSR J1622-4950与1E1547.0-5408——开展每周一次的观测，以追踪其自转状态、流量密度与偏振特性。我们将以更低频次对曾发射射电脉冲的XTE J1810-197进行监测，以期捕捉其脉冲活动的复苏迹象——正如脉冲星PSR J1622-4950近期的表现：它在休眠超2年后于2017年重新激活！此类观测将生成关于自转扭矩的连续记录，从而阐明磁星持续释放磁能的过程。本研究的总体目标包括：深化对磁星磁层动力学行为的理解，明确其内部射电辐射产生的物理条件；此外还将对磁星多变的射电辐射特征进行表征，以此为辐射机制研究限定约束——该机制在至少若干方面与普通脉冲星的辐射机制存在差异。