论文标题
超过一年的超级爆炸爆炸，超跨白色矮人二进制揭示了供体星辐射的重要性
A year long superoutburst from an ultracompact white dwarf binary reveals the importance of donor star irradiation
论文作者
论文摘要
SDSS J080710+485259是最长的爆发超紧凑的白矮人二进制。它的第一个检测到的Superoutburst始于2018年11月，持续了一年，这是迄今为止最长的轨道时期，即在任何积聚白矮人的短轨道时期。在这里，我们表明，SDSS J080710+485259的超级爆炸持续时间超过了其增生磁盘的2个月粘性时间约为5倍。因此，它既不遵循经验关系，也不遵循轨道时期和AM CVN系统的轨道时期和超级爆炸时间之间的理论关系。 Superoutburst六个月后，二进制二进制的磁磁头比超级爆炸之前的静态水平保持0.4。我们在后爆发阶段检测到可变的X射线行为，表明质量积聚率的变化。我们讨论了供体恒星的辐照，这是迄今为止探索不佳的情况，最终可以作为引力波源作为引力波源会产生重要的后果，可能会解释Superoutburst的异常观察到的特征。
SDSS J080710+485259 is the longest period outbursting ultracompact white dwarf binary. Its first ever detected superoutburst started in November of 2018 and lasted for a year, the longest detected so far for any short orbital period accreting white dwarf. Here we show that the superoutburst duration of SDSS J080710+485259 exceeds the 2 months viscous time of its accretion disk by a factor of about 5. Consequently it follows neither the empirical relation nor the theoretical relation between the orbital period and the superoutburst duration for AM CVn systems. Six months after the end of the superoutburst the binary remained 0.4 mag brighter than its quiescent level before the superoutburst. We detect a variable X-ray behavior during the post-outburst cooling phase, demonstrating changes in the mass accretion rate. We discuss how irradiation of the donor star, a scenario poorly explored so far and which ultimately can have important consequences for AM CVns as gravitational wave sources, might explain the unusual observed features of the superoutburst.
