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arXiv 1906.04723astro-ph.SRastro-ph.GA
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双峰OI轮廓：KH 15 D周围气态环的可能特征

Double-peaked OI profile: a likely signature of the gaseous ring around KH 15D

Min Fang, Ilaria Pascucci, Jinyoung Serena Kim, Suzan Edwards

备注：
8 pages, 5 figures, accepted by ApJL
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摘要：

KH 15 D是一颗着名的光谱双星，因为它独特而戏剧性的光度变化。这种变化可以用环双星尘埃环来解释，但环本身从未被直接探测到。本文对[O~{ \scriptsize I}]\，$λ$ 6300的双峰分布提出了一种新的解释，认为它起源于KH 15 D的热盘表面。通过模拟这些配置文件，我们测量发射半径之间的$\sim$ 0.5--5 AU，基本上是一个气体环非常相似的径向范围内的尘埃环推断从建模系统的光度变化。我们还讨论了来自附近大质量恒星HD~47887的紫外光子驱动的外部光蒸发将盘外缘截断到观测值的可能性。

英文摘要：

KH 15D is a well-known spectroscopic binary because of its unique and dramatic photometric variability. The variability is explained by a circumbinary dust ring but the ring itself was never directly detected. We present a new interpretation of the double-peaked [O~{\scriptsize I}]\,$λ$6300 profiles as originating from the hot disk surface of KH 15D. By modeling these profiles, we measure emitting radii between $\sim$0.5--5 au, basically a gaseous ring very similar in radial extent to the dust ring inferred from modeling the system's photometric variability. We also discuss the possibility that external photoevaporation driven by UV photons from the nearby massive star HD~47887 has truncated the outer edge of the disk to the observed value.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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