论文标题
在开普勒/k2数据中发现新的WZ Sagittae类型灾难性变量
Discovery of a New WZ Sagittae Type Cataclysmic Variable in the Kepler/K2 Data
论文作者
论文摘要
我们在开普勒/K2广告系列11字段中确定了一个新的，明亮的瞬态。它的光线曲线每天增加了七个幅度，然后在一个月内降低了三个幅度，然后迅速消失了两个幅度。在活动结束时，仍可以检测到瞬态。光曲线与WZ〜SGE型矮人Nova爆发一致。在头10天内看到了82分钟的早期超级烟囱，这是WZ〜SGE类典型的二元轨道时期。高峰亮度后十天出现强大的超级振荡，周期为83至84分钟。峰值亮度后25天，光曲线中的颠簸似乎表明了一个微妙的重塑阶段，这表明这是一种不寻常的A爆发。这是开普勒/K2在爆发过程中观察到的唯一WZ〜SGE类型系统。这次爆发的早期崛起与权力法则破裂相当。在最初的10个小时内，系统线性亮，然后以4.8的功率定律指数过渡到陡峭的上升。查看档案开普勒/K2数据和新的苔丝观测值，在Superoutburst启动时，最初几个小时的线性上升似乎在Su〜uma Stars中很常见。
We identify a new, bright transient in the Kepler/K2 Campaign 11 field. Its light curve rises over seven magnitudes in a day and then declines three magnitudes over a month before quickly fading another two magnitudes. The transient was still detectable at the end of the campaign. The light curve is consistent with a WZ~Sge type dwarf nova outburst. Early superhumps with a period of 82 minutes are seen in the first 10 days and suggest that this is the orbital period of the binary which is typical for the WZ~Sge class. Strong superhump oscillations develop ten days after peak brightness with periods ranging between 83 and 84 minutes. At 25 days after the peak brightness a bump in the light curve appears to signal a subtle rebrightening phase implying that this was an unusual type-A outburst. This is the only WZ~Sge type system observed by Kepler/K2 during an outburst. The early rise of this outburst is well-fit with a broken power law. In first 10 hours the system brightened linearly and then transitioned to a steep rise with a power law index of 4.8. Looking at archival Kepler/K2 data and new TESS observations, a linear rise in the first several hours at the initiation of a superoutburst appears to be common in SU~UMa stars.
