论文标题
Meerkat观察PSR J1750-3503中的逆转窗口
MeerKAT observations of the reversing drifting subpulses in PSR J1750-3503
论文作者
论文摘要
我们对PSR J1750-3503中的子孔漂移进行了分析，该分析的特征是漂移方向的突然过渡。由于脉冲星未显示其他模式变化或清除空白，因此它是研究漂移方向变化现象的理想候选系统。对于$ \ sim 80 \％的$，子珀斯的特征是正面漂移 - 从早期到较晚的纵向 - 而在其他$ \ sim 20 \％$中，漂移方向为负。具有正漂移的单个脉冲的子孔隔，$ p_2 =（18.8 \ pm 0.1）^{\ circ} $，对于具有负漂移的单个脉冲，$ p_2 =（17.5 \ pm 0.2）当漂移稳定时，漂移模式的测量重复时间为$ p_3^{\ rm obs} =（43.5 \ pm 0.4）p $，其中$ p $是pulsar ofer pulsar时期。我们表明，观察到的数据可以通过纯粹的表面磁场的偶极构型在磁轴周围旋转的旋转频率旋转来复制。假设实际的重复时间$ p_3 <2p $，可以对观察到的漂移特性进行建模，以便我们观察到其别名值。 $ p_3 $的微小变化，即$ 6 \％$（或假设较高的别名订单）的订单，足以复制我们观察到的特征漂移方向的变化。
We present an analysis of the subpulse drift in PSR J1750-3503, which is characterized by abrupt transitions of drift direction. As the pulsar does not exhibit other mode changes or clear nulling, it is an ideal candidate system for studying the phenomenon of drift direction change. For $\sim 80\%$ of the time the subpulses are characterized by positive drift - from early to later longitudes - while the drift direction is negative in the other $\sim 20\%$. The subpulse separation for single pulses with positive drift, $P_2=(18.8\pm 0.1)^{\circ}$, is higher then for single pulses with negative drift, $P_2=(17.5\pm 0.2)^{\circ}$. When the drift is stable, the measured repetition time of the drift pattern is $P_3^{\rm obs}=(43.5 \pm 0.4) P$, where $P$ is pulsar period. We show that the observed data can be reproduced by a carousel models with subpulse rotation around the magnetic axis using purely dipolar configuration of surface magnetic field. The observed drift characteristics can be modeled assuming that the actual repetition time $P_3<2P$, such that we observe its aliased value. A small variation in $P_3$, of the order of $6\%$ (or less assuming higher alias orders), is enough to reproduce the characteristic drift direction changes we observe.
