论文标题
Chamaeleon中的一个谜：偶然发现银河共生Nova
A Mystery in Chamaeleon: Serendipitous Discovery of a Galactic Symbiotic Nova
论文作者
论文摘要
我们介绍了以银河系中共生二元星系中发生的低光度NOV的偶然发现。我们将广泛的档案数据与与恒星对象V $^*$ CN CHA相关的新的后续观测以及Chamaeleon星座的新作用列出。该对象具有很长的时间（$ \ sim \！250 \，$ DAY），高振幅（$ \ sim \！3 \，$ mag）的光学变异性在最近的过去，在光学亮度的提高到$ \ sim \！ 8 \，$ adududes和在这种亮度上的持久性约3年，然后是$ \ sim \！ 1.4 \，{\ rm mag} \，{\ rm yr}^{ - 1} $ dimming。该对象的当前光光度似乎由H $α$发射的主导，该发射也表现出蓝移吸收（一种类似P-Cygni的曲线）。在考虑了许多理论来解释这些无数观察的理论之后，我们确定v $^*$ cn cha很可能是一种共生（进化的星白矮人二元）系统，它具有长期的，低亮度，低亮度，nova。通过这种方式解释，V $^*$ CN CHA中的爆发是有史以来观察到的最低光度。
We present the serendipitous discovery of a low luminosity nova occurring in a symbiotic binary star system in the Milky Way. We lay out the extensive archival data alongside new follow-up observations related to the stellar object V$^*$ CN Cha in the constellation of Chamaeleon. The object had long period ($\sim\! 250\,$day), high amplitude ($\sim\! 3\,$mag) optical variability in its recent past, preceding an increase in optical brightness by $\sim\! 8\,$magnitudes and a persistence at this luminosity for about 3 years, followed by a period of $\sim\! 1.4\,{\rm mag}\,{\rm yr}^{-1}$ dimming. The object's current optical luminosity seems to be dominated by H$α$ emission, which also exhibits blue-shifted absorption (a P-Cygni-like profile). After consideration of a number of theories to explain these myriad observations, we determine that V$^*$ CN Cha is most likely a symbiotic (an evolved star-white dwarf binary) system which has undergone a long-duration, low luminosity, nova. Interpreted in this way, the outburst in V$^*$ CN Cha is among the lowest luminosity novae ever observed.
