利用射电脉冲星计时检验中子星内部动力学
Testing internal dynamics in neutron stars with radio pulsar timing
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中文总结 AI 辅助
本研究通过对比两种力矩模型，利用脉冲星计时数据检验中子星内部动力学，发现PSR J1359-6038偏向独立力矩，PSR B1937+21无偏好，Vela受限于数据质量。
中文摘要 AI 辅助
脉冲星的旋转变化反映了内部角动量交换（通过大小相等、方向相反的力矩产生平稳的自旋噪声）或独立力矩导致的角动量扩散性变化（非平稳自旋噪声）。我们比较了射电辐射壳层与内部超流体的两种模型，通过观测到的脉冲星相位来检验角速度涨落的平稳性。我们展示了三颗具有可测量计时噪声的孤立脉冲星的结果，证明了不同的推断结果。对于PSR J1359-6038，数据略微倾向于独立力矩而非大小相等、方向相反的力矩，优势比为七百比一。对于PSR B1937+21，分析显示两种模型之间没有明显偏好。对于处于前跃变（glitch）区间的Vela脉冲星，过度的散射和无法解释的残余结构限制了其解释。
英文摘要
Rotational variations in pulsars reflect either internal angular momentum exchange via equal and opposite torques (stationary spin noise) or independent torques causing diffusive changes in total angular momentum (nonstationary spin noise). We compare two models of a radio-emitting crust and interior superfluid to test the stationarity of angular velocity fluctuations through observed pulsar phases. We present results for three isolated pulsars with measurable timing noise, demonstrating distinct inference outcomes. For PSR J1359-6038, the data mildly favor independent torques over equal-and-opposite torques, with an odds ratio of seven hundred to one. For PSR B1937+21, the analysis shows no clear preference between the models. For Vela in a pre-glitch interval, excess scatter and unexplained residual structure limit the interpretation.
发表机构
- Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Leibniz Universität Hannover（马克斯·普朗克引力物理研究所（爱因斯坦研究所），汉诺威莱布尼茨大学）
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