论文标题
三重变形中子星的进度
Precession of triaxially deformed neutron stars
论文作者
论文摘要
如果瞬时旋转轴和角动量不排列，则变形的中子恒星（NS）将进取。这种进动可以产生连续的重力波（GWS），并调节脉冲星的电磁脉冲信号。在此贡献中，我们将以前的工作扩展到更方便的参数化中。我们将NS视为刚性三轴体，并为角速度和欧拉角提供分析解决方案。我们总结了从自由进攻三轴NSS的一般GW波形，并使用泰勒膨胀以获得较小的摇摆角的波形。对于Pulsar信号，我们采用一个简单的锥体模型来研究定时残差和脉冲轮廓调制。实际上，电磁扭矩作用于脉冲星并影响进动行为。这是我们先前工作的附加扩展，我们考虑了真空扭矩，并显示了体形角速度残留物的说明性示例。有关连续GWS和来自三名NSS强迫进攻的调制脉冲星信号的详细研究将在以后的研究中进行。
A deformed neutron star (NS) will precess if the instantaneous spin axis and the angular momentum are not aligned. Such a precession can produce continuous gravitational waves (GWs) and modulate electromagnetic pulse signals of pulsars. In this contribution we extend our previous work in a more convenient parameterization. We treat NSs as rigid triaxial bodies and give analytical solutions for angular velocities and Euler angles. We summarize the general GW waveforms from freely precessing triaxial NSs and use Taylor expansions to obtain waveforms with a small wobble angle. For pulsar signals, we adopt a simple cone model to study the timing residuals and pulse profile modulations. In reality, the electromagnetic torque acts on pulsars and affects the precession behavior. Thereof, as an additional extension to our previous work, we consider a vacuum torque and display an illustrative example for the residuals of body-frame angular velocities. Detailed investigations concerning continuous GWs and modulated pulsar signals from forced precession of triaixal NSs will be given in future studies.
