论文标题
毫秒Pulsar PSR J0636+5128中的快速轨道扩张：蒸发风？
Rapid orbital expansion in millisecond pulsar PSR J0636+5128: evaporation winds?
论文作者
论文摘要
PSR J0636+5128是由绿色银行北部天体帽脉冲星调查发现的2.87毫秒二进制脉冲星（MSP），并且在确认的二进制脉冲脉冲中拥有第三个最短的轨道时期（$ p = 1.6 $小时）。最近的观察结果报道说，该来源以$ \ dot {p} =（1.89 \ pm0.05）\ times 10^{ - 12}〜\ rm s \，s^{ - 1} $的速率快速扩展。由MSP的旋转光度引起的同伴的蒸发风可能是轨道周期衍生物的原因。但是，我们的计算表明，从同伴附近或内部拉格朗日点弹出的风无法解释由于难以置信的蒸发效率而引起的观察结果。假设以不对称盘风或流出形式从MSP附近弹出蒸发风，则可以将蒸发效率限制为$ \ sim 0.1 $。因此，在PSR J0636+5128中检测到的快速轨道膨胀提供了MSP周围流出和增生盘的证据。
PSR J0636+5128 is a 2.87 ms binary millisecond pulsar (MSP) discovered by the Green Bank Northern Celestial Cap Pulsar Survey, and possesses the third shortest orbital period ($P=1.6$ hour) among confirmed binary pulsars. Recent observations reported that this source is experiencing a rapid orbital expansion at a rate of $\dot{P}=(1.89\pm0.05)\times 10^{-12}~\rm s\,s^{-1}$. The evaporation winds of the companion induced by the spin-down luminosity of the MSP may be responsible for such a positive orbital period derivative. However, our calculations show that the winds ejecting from the vicinity of the companion or the inner Lagrangian point can not account for the observation due to an implausible evaporation efficiency. Assuming that the evaporation winds eject from the vicinity of the MSP in the form of asymmetry disc winds or outflow, the evaporation efficiency can be constrained to be $\sim 0.1$. Therefore, the rapidly orbital expansion detected in PSR J0636+5128 provides evidence of outflows and accretion disc around the MSP.
