标题： 脉冲星演化约束：毫秒脉冲星的联合周期-自旋下降分布 显示英文标题

标题： Constraints on Pulsar Evolution: The Joint Period-Spindown Distribution of Millisecond Pulsars

摘要： 为了检验观测到的毫秒无线电脉冲星（MSRP）是否是毫秒X射线脉冲星（MSXP）无可争议的后裔，我们计算了标准演化模型下的联合周期-自旋下降率（P-Pdot）分布。 标准演化模型所暗示的P-Pdot密度与观测结果相比表明，年轻/高磁场的MSRP存在显著的过剩。 考虑到由于观测选择效应引起的偏差，毫秒脉冲星不可能从单一的、连贯的祖先群体演化而来，该群体在无线电辐射开始后通过磁偶极辐射失去能量。 通过生成P-Pdot概率图，我们以超过95%的置信度表明，具有高磁场的自转最快的毫秒脉冲星，例如PSR B1937+21，不能由观测到的MSXP在标准模型框架内产生。 显示英文摘要

摘要： We calculate the joint period-spindown (P-Pdot) distributions of millisecond radio pulsars (MSRP) for the standard evolutionary model in order to test whether the observed MSRPs are the unequivocal descendants of millisecond X-ray pulsars (MSXP). The P-Pdot densities implied by the standard evolutionary model compared with observations suggest that there is a statistically significant overabundance of young/high magnetic field MSRPs. Taking biases due to observational selection effects into account, it is unlikely that MSRPs have evolved from a single coherent progenitor population that loses energy via magnetic dipole radiation after the onset of radio emission. By producing the P-Pdot probability map, we show with more than 95% confidence that the fastest spinning millisecond pulsars with high magnetic fields, e.g. PSR B1937+21, cannot be produced by the observed MSXPs within the framework of the standard model.