论文标题
带有螺旋桨回收磁盘的新生儿毫秒磁铁的演变
The evolution of a newborn millisecond magnetar with a propeller-recycling disk
论文作者
论文摘要
可以通过爆炸性现象（例如超浮肿的超新星和伽马射线爆发）形成快速旋转和高度磁化的中子星（NS）。这种新生儿NS可以通过其旋转来实质上影响这些爆炸性瞬变。 NS的旋转演变有时会受到后备积聚的影响，尽管通常由NS的磁偶极辐射和重力波辐射调节。在适当的条件下，可以首先弹出积聚材料并随后回收回去，以便积聚磁盘可以长时间保持准稳态状态。在这里，我们描述了NS与这样的螺旋桨回收磁盘及其共进化的相互作用。我们的结果表明，NS的旋转最初可以由螺旋桨支配，该螺旋桨阻止了磁盘材料掉到NS上，直到数百或数千秒钟后。建议将磁盘材料的突然掉落到NS上可以显着抑制磁偶极子辐射，然后将NS从正常磁场转换为低场磁场。新生儿NS的这种进化行为可以帮助理解NS对早期GRB次要和后期超新星/Kilonova发射的截然不同的影响。
A rapidly rotating and highly magnetized neutron star (NS) could be formed from the explosive phenomena such as superluminous supernovae and gamma-ray bursts. This newborn NS can substantially influence the emission of these explosive transients through its spin-down. The spin-down evolution of the NS can sometimes be affected by fallback accretion, although it is usually regulated by the magnetic dipole radiation and gravitational wave radiation of the NS. Under appropriate conditions, the accreting material can be firstly ejected and subsequently recycled back, so that the accretion disk can keep in a quasi-steady state for a long time. Here we describe the interaction of the NS with such a propeller-recycling disk and their co-evolution. Our result shows that, the spin-down of the NS can be initially dominated by the propeller, which prevents the disk material from falling onto the NS until hundreds or thousands of seconds later. It is suggested that the abrupt fall of the disk material onto the NS could significantly suppress the magnetic dipole radiation and then convert the NS from a normal magnetar to a low-field magnetar. This evolution behavior of the newborn NS can help to understand the very different influence of the NS on the early GRB afterglows and the late supernova/kilonova emission.
