论文标题
在共生二进制中发现可能非常快速的外乳术新星
Discovery of a probable very fast extragalactic nova in a symbiotic binary
论文作者
论文摘要
Novae非常快速的Novae会很快进化（在仅几天的时间尺度上）。由于它们的快速发展，Novae非常迅速地检测和学习，尤其是在早期。在这里，我们报告了这一发现是作为我们瞬态UV对象项目的一部分，在附近的螺旋星系NGC 300中可能非常快速的NOVA，我们发现在近似二硫酸群（NUV）中，第一个检测率是大约2个小时，我们发现了峰值上升到峰值（很少观察到非常快的Novae）。在紫外线和光条带中也观察到衰减的峰值和早期阶段。该来源在3.5天内迅速衰减了2个NUV幅度，使其成为已知最快的Novae之一。此外，在档案中的近红外spitzer和vircam图像中发现了可能的静止对应物，但在任何深度的光学和紫外线观测中都没有发现，表明静止的光谱形状非常红。爆发和静止特性表明该系统可能是共生二元。由于其非常高的推断WD质量（〜1.35毫秒；通过将此源与其他非常快的Novae进行比较，因此，我们在一般快速的Novae的背景下讨论了这种新的瞬变。
Very fast novae are novae which evolve exceptionally quickly (on timescales of only days). Due to their rapid evolution, very fast novae are challenging to detect and study, especially at early times. Here we report the discovery, which was made as part of our Transient UV Objects project, of a probable very fast nova in the nearby spiral galaxy NGC 300. We detected the rise to the peak (which is rarely observed for very fast novae) in the near-ultraviolet (NUV), with the first detection just ~2 hours after the eruption started. The peak and early stages of the decay were also observed in UV and optical bands. The source rapidly decayed by 2 NUV magnitudes within 3.5 days, making it one of the fastest novae known. In addition, a likely quiescent counterpart was found in archival near-infrared Spitzer and VIRCAM images but not in any deep optical and UV observations, indicating a very red spectral shape in quiescence. The outburst and quiescence properties suggest that the system is likely a symbiotic binary. We discuss this new transient in the context of very fast novae in general and specifically as a promising supernova Type Ia progenitor candidate, due to its very high inferred WD mass (~1.35 Ms; determined by comparing this source to other very fast novae).
