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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Observational possibility of the 'snow line' on the surface of circumstellar disks with the scattered light
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Observational possibility of the 'snow line' on the surface of circumstellar disks with the scattered light

机译：具有散射光的星际盘表面“雪线”的观测可能性

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We discuss how we obtain the spatial distribution of ice on the surface of the circumstellar disk around young stars. Ice in the disks plays a very important role in various issues, for instance, on the disk structure, on planet formation, on an isotopic anomaly in meteorites, and on the origin of the oceans on Earth. Therefore, spatially resolved observations of the condensation/sublimation front of ice, the so-called snow line is strongly required. Here, we propose a new method for obtaining a spatially resolved snow line on circumstellar disks by observing a 3 mu m H2O ice feature in the scattered light. Based on radiative transfer considerations, we show that the feature is clearly imprinted in the spectrum of the scattered light from both optically thick and thin circumstellar disks. We also show that the scattered light and the H2O ice feature from protoplanetary disks are detectable and spatially resolvable with current instruments through an H2O narrowband filter around 3 Am. Finally, we present a diagnostics of disk dust properties on K - H2O and K - L' two-color diagram.
机译：我们讨论了如何获得年轻恒星周围圆盘表面冰的空间分布。盘中的冰在各种问题上起着非常重要的作用，例如，在盘的结构，行星的形成，陨石的同位素异常以及地球上海洋的起源上。因此，强烈需要在空间上解析冰的凝结/升华前沿，即所谓的雪线。在这里，我们提出了一种新方法，通过在散射光中观察到3微米水冰的特征来获得在圆盘上的空间分辨雪线。基于辐射转移的考虑，我们表明该特征清楚地印在了来自光学厚的和薄的星际圆盘的散射光的光谱中。我们还表明，利用当前仪器，通过凌晨3点左右的H2O窄带滤光片，可以检测到原行星盘的散射光和H2O冰特征，并利用空间仪器对其进行空间分辨。最后，我们在K-H2O和K-L'两色图中给出了磁盘灰尘特性的诊断。

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