论文标题
在X射线Pulsar GX 301 $ -2中发现逆行旋转的中子星
Discovery of a retrogradely rotating neutron star in the X-ray pulsar GX 301$-$2
论文作者
论文摘要
我们通过Fermi/GBM的长期监测沿轨道上的慢速X射线Pulsar GX 301 $ -2进行了旋转演变的分析。基于观察确认的积分方案和角动量增值的分析模型，我们证明，在该系统中，中子恒星逆行旋转，即朝与轨道运动相反的方向。对这种系统的这种首要发现证明了在具有合适的吸积扭矩的积聚系统中逆行旋转的主要可能性，并且可能会对我们对X射线脉冲星的自旋演变的理解，最初旋转时期的估计以及其进化的最终结果产生深远的影响。
We report on the analysis of the spin evolution of a slow X-ray pulsar GX 301$-$2 along the orbit using long-term monitoring by Fermi/GBM. Based on the observationally confirmed accretion scenario and an analytical model for the accretion of angular momentum we demonstrate that in this system, the neutron star spins retrogradely, that is, in a direction opposite to the orbital motion. This first-of-a-kind discovery of such a system proves the principal possibility of retrograde rotation in accreting systems with suitable accretion torque, and might have profound consequences for our understanding of the spin evolution of X-ray pulsars, estimates of their initial spin periods, and the ultimate result of their evolution.
