论文标题
复发性novae的超级X射线阶段，作为其白矮人群众的指标
Supersoft X-Ray Phases of Recurrent Novae as an Indicator of their White Dwarf Masses
论文作者
论文摘要
我们已经检查了七个观察到的七个良好复发Novae的光学/X射线光曲线，V745 SCO，M31N 2008-12A，LMC N 1968，U SCO，RS OPH，LMC N 2009a，T PYX，T pyx和1个经过的Nova Nova候选人LMC N2012A。八个中的六个novae表明，SuperSoft X射线源（SSS）阶段的持续时间是爆发总持续时间的0.70倍（$ = $ = $ = $ x射线下午），即$ t _ {\ rm sss} = 0.70 t _ {\ rm sss} = 0.70 t _ {\ rm fort} $，总持续时间为260的日期，均为260 day for。这六个复发性的novae显示了宽阔的矩形X射线光曲线形状，其上半场在X射线计数速率上是高度变化的。 SSS相也对应于一个光原相，该光平台表明由燃烧氢的WD照射了大的积聚盘。其他两个复发的Novae T Pyx和V745 SCO显示出X射线光曲线的狭窄三角形形状，没有光原阶段。它们之间的关系在$ t _ {\ rm sss} $和$ t _ {\ rm off} $之间与以上六个复发性诺瓦有很大不同。我们还提供了具有各种WD质量和出色金属性（$ Z = $ 0.004、0.01、0.02和0.05）的复发性Novae的理论SSS持续时间，并与观察到的这些经常性Novae的持续时间进行了比较。我们表明，SSS持续时间是复发Novae中WD质量的良好指标，并具有宽阔的矩形X射线光曲线形状。
We have examined the optical/X-ray light curves of seven well-observed recurrent novae, V745 Sco, M31N 2008-12a, LMC N 1968, U Sco, RS Oph, LMC N 2009a, T Pyx, and one recurrent nova candidate LMC N 2012a. Six novae out of the eight show a simple relation that the duration of supersoft X-ray source (SSS) phase is 0.70 times the total duration of the outburst ($=$ X-ray turnoff time), i.e., $t_{\rm SSS}=0.70 t_{\rm off}$, the total duration of which ranges from 10 days to 260 days. These six recurrent novae show a broad rectangular X-ray light curve shape, first half a period of which is highly variable in the X-ray count rate. The SSS phase corresponds also to an optical plateau phase that indicates a large accretion disk irradiated by a hydrogen-burning WD. The other two recurrent novae, T Pyx and V745 Sco, show a narrow triangular shape of X-ray light curve without an optical plateau phase. Their relations between $t_{\rm SSS}$ and $t_{\rm off}$ are rather different from the above six recurrent novae. We also present theoretical SSS durations for recurrent novae with various WD masses and stellar metallicities ($Z=$0.004, 0.01, 0.02, and 0.05) and compare with observed durations of these recurrent novae. We show that the SSS duration is a good indicator of the WD mass in the recurrent novae with a broad rectangular X-ray light curve shape.
