论文标题
CTCV J2056-3014：X射线品种中间北极极性携带极快的白色矮人
CTCV J2056-3014: An X-ray-faint Intermediate Polar Harboring An Extremely Fast-spinning White Dwarf
论文作者
论文摘要
我们报告了XMM-Newton X射线观测值，这些观察结果揭示了CTCV J2056-3014是一种不寻常的吸积驱动的中间极性（IP）系统。它是X射线素质IPS类的成员，其空间密度仍然不受限制，但可能很高，l $ _ {x，0.3-12 kev} $为1.8 $ \ times $ 10 $ 10 $^{31} $ erg s $^s $^{ - 1} $。我们在X射线中发现了一个连贯的29.6S脉动，在我们对已发表的光学数据的重新分析中也揭示了该系统，这表明该系统是迄今为止最快，最快的，牢固的白色矮人（WD）。系统中没有大量的X射线吸收。积聚以适中的速度发生（$ \ sim $ 6 $ \ times $ 10 $^{ - 12} $ m $ _ {\ odot} $ yr $^{ - 1} $在WD上方高的冲击中，而恒星似乎在平衡方面旋转并且磁场低。对CTCV J2056-3014的进一步研究可能对WDS中磁场的起源，对磁性灾难变量的种群和进化以及近迅速旋转的磁性WD的物理物理学具有广泛的影响。
We report on XMM-Newton X-ray observations that reveal CTCV J2056-3014 to be an unusual accretion-powered, intermediate polar (IP) system. It is a member of the class of X-ray-faint IPs whose space density remains unconstrained but potentially very high, with L$_{x,0.3-12 keV}$ of 1.8$\times$10$^{31}$ erg s$^{-1}$. We discovered a coherent 29.6s pulsation in X-rays that was also revealed in our reanalysis of published optical data, showing that the system harbors the fastest-spinning, securely known white dwarf (WD) so far. There is no substantial X-ray absorption in the system. Accretion occurs at a modest rate ($\sim$ 6$\times$10$^{-12}$ M$_{\odot}$ yr$^{-1}$) in a tall shock above the WD, while the star seems to be spinning in equilibrium and to have low magnetic fields. Further studies of CTCV J2056-3014 potentially have broad implications on the origin of magnetic fields in WDs, on the population and evolution of magnetic cataclysmic variables, and also on the physics of matter around rapidly rotating magnetic WDs.
