Parkes observations for project P885 semester 2018APRS_06

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 just happened with PSR\r\nJ1622-4950, which turned on in April 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.本研究提议对目前已知的3颗射电脉冲发射磁星（magnetar）中的2颗——PSR J1622-4950与1E1547.0-5408开展每周一次的观测，以追踪其自转参数、流量密度（flux density）与偏振（polarisation）特性。针对曾发射射电脉冲（radio pulsations）的XTE J1810-197，本研究将以较低频次开展监测，以警惕其重新活跃——正如PSR J1622-4950在沉寂超2年后，于2017年4月重新激活的情况那样。此类观测将获取连续的转矩（torque）记录，从而揭示磁星磁能的持续释放过程。本研究的核心拓展目标包括：深化对磁星磁层（magnetospheres）动力学行为的认知，明确其内部射电辐射产生的物理条件；此外还将对其可变射电辐射进行特征分析，以约束射电辐射机制——该机制在至少部分层面上与普通脉冲星（ordinary pulsars）的辐射机制存在差异。