论文标题
围绕矮人Nova Tw Virginis的超爆布的静态磁盘的演变
Evolution of the Quiescent Disk surrounding a Superoutburst of the Dwarf Nova TW Virginis
论文作者
论文摘要
使用光曲线建模研究了矮人Nova（DN）TW VIR的开普勒K2短节子光曲线的一部分。将光曲线分为24个部分，每个部分的数据长度为$ \ sim \，$ 0.93 \，d，包括在Superoutburst（SO）之后的4个部分，其中为20个部分。由于形态差异，静态轨道调制分为三种类型。使用固定的磁盘半径和两个组件恒星参数，来自各部分的所有24个合成磁盘模型均显示一致的配置，由磁盘和两个热点组成：一个在磁盘边缘的垂直侧，另一个位于磁盘表面的另一个。在SO之前，突然增强了磁盘和类似环形的表面螺旋体，从而触发前体，然后触发前体。在SO之后和第一次正常爆发之前的静止期结束时，边缘螺旋体变得更热，而表面螺旋体则切换为“ coolpot”，覆盖了近一半的磁盘表面。在静止的磁盘表面近一半。在静止状态下，表面孔始终位于磁盘的外部散布式散布的温度时，始终位于恒定的光线内。爆发，像许多U \一样，轨道周期为3-5 \，HR，质量转移率显着低于CV演化的标准/修订模型的预测。
Portions of the Kepler K2 Short Cadence light curve of the dwarf nova (DN) TW Vir at quiescence are investigated using light curve modeling. The light curve was separated into 24 sections, each with a data length of $\sim\,$0.93\,d, comprising 4 sections before and 20 after a superoutburst (SO). Due to the morphological differences, the quiescent orbital modulation is classified into three types. Using a fixed disk radius and the two component stellar parameters, all 24 synthetic disk models from the sections show a consistent configuration, consisting of a disk and two hotspots: one at the vertical side of the edge of the disk and the other one on the surface of the disk. Before the SO, the disk and a ringlike surface-hotspot are suddenly enhanced, triggering a precursor and then SO. At the end of the quiescent period following the SO and before the first normal outburst, the edge-hotspot becomes hotter, while the surface-hotspot switches into a ``coolspot" with a coverage of nearly one-half of the disk surface. During quiescence, the surface-hotspot is always located at the outer part of the disk with a constant radial width. A flat radial temperature distribution of the disk is found and appears flatter when approaching the outburst. Like many U\,Gem-type DN with orbital periods of 3-5\,hr, the mass transfer rate is significantly lower than the predictions of the standard/revised models of CV evolution.
