标题： 2010年食双星U天蝎座的早期爆发光谱 显示英文标题

标题： The 2010 early outburst spectrum of the recurrent nova U Scorpii

摘要： 目标。 我们展示了快速反复新星U Sco在最近爆发期间的光学光谱，这些光谱是在最大亮度后的24小时内获得的。 方法。 我们使用中等分辨率（R~4000）的光谱，这些光谱是用Magellan（Clay）6.5米望远镜上的MagE光谱仪在Las Campanas天文台获取的。 结果。 该光谱因其缺乏在大多数新星最大亮度时可见的低电离瞬态重元素吸收系统而引人注目。 我们认为这可能是由于内部拉格朗日L1质量转移的主导以及该天体缺乏环双星气体库所致。 显示英文摘要

摘要： Aims. We present optical spectra of the fast recurrent nova U Sco during its recent outburst, obtained within 24 hr of maximum light. Methods. We use medium resolution (R~4000) spectra taken with the with the MagE spectrograph on the Magellan (Clay) 6.5m telescope of the Las Campanas Observatories. Results. The spectrum is notable for its lack of a low ionization transient heavy element absorption system that is visible in the large majority of novae near maximum light. We suggest that this may be due to the dominance of inner Lagrangian L1 mass transfer and the absence of a circumbinary gas reservoir in this object