Light Curves of Rapidly Rotating Neutron Stars
Light Curves of Rapidly Rotating Neutron Stars
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快速旋转中子星的光曲线
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
K. Rauch
中科院分区：
文献类型：
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作者：
T. Braje;R. Romani;K. Rauch
我们考虑快速旋转对具有热极冠的中子星光变曲线的影响。对于 P ≈ 3 ms 自旋周期，脉冲分数可能比简单、缓慢旋转（史瓦西）估计大一个数量级。特别是多普勒增强会导致脉冲轮廓中的特征失真和“软滞后”，而这些在具有中等能量分辨率的光曲线中很容易测量。使用约 105 个光子，还应该可以隔离光传播时间变化和帧拖动的更微妙的扭曲。对即将到来的 X 射线任务的高质量毫秒脉冲星数据的详细分析必须包括这些效应。
We consider the effect of rapid rotation on the light curves of neutron stars with hot polar caps. For P ≈ 3 ms spin periods, the pulse fractions can be as much as an order of magnitude larger than with simple, slowly rotating (Schwarzschild) estimates. Doppler boosting, in particular, leads to characteristic distortion and "soft lags" in the pulse profiles, which are easily measurable in light curves with moderate energy resolution. With ~105 photons it should also be possible to isolate the more subtle distortions of light travel time variations and frame dragging. Detailed analysis of high-quality millisecond pulsar data from upcoming X-ray missions must include these effects.