Parkes observations for project P885 semester 2018OCTS_13

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.

本研究拟对目前已知的3颗可发射射电脉冲的磁星（magnetars）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、流量密度与偏振特性。我们将以较低频次监测曾发射射电脉冲的XTE J1810-197，以警惕其脉冲活动的复苏——正如PSR J1622-4950近期的表现：它在沉寂超2年后于2017年重新激活。此类观测将获得连续的力矩记录，阐明磁星磁能的持续释放过程。本研究的核心拓展目标包括：深化对磁星磁层动力学行为的认知，明确其内部射电辐射产生的环境条件；同时对其可变射电辐射开展特征分析，以约束辐射机制——这类机制在至少部分层面有别于普通脉冲星的辐射机制。