Parkes observations for project P885 semester 2018APRS_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 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.

我们提出对目前已知的3颗可发射射电脉冲（radio pulsations）的磁星（magnetar）中的2颗——脉冲星PSR J1622-4950与1E1547.0-5408——开展每周一次的观测，以追踪其自转特性、流量密度（flux density）与偏振（polarisation）状态。我们将以更低频次监测曾发射射电脉冲的XTE J1810-197，以期捕捉其辐射复苏的迹象——正如2017年4月PSR J1622-4950在休眠超2年后重新激活的情况那样。
此类观测将获取关于扭矩（torque）的连续观测记录，揭示磁星磁能的持续释放过程。我们的总体研究目标包括：其一，更深入地理解磁星磁层（magnetospheres）的动力学行为；其二，明确其内部产生射电辐射的物理条件；此外，我们还将对磁星的可变射电辐射特性进行表征，从而为其辐射机制研究提供约束——这类辐射机制在至少某些方面与普通脉冲星（pulsars）的辐射机制存在差异。