SHADOWS CAST BY A WARP IN THE HD 142527 PROTOPLANETARY DISK
SHADOWS CAST BY A WARP IN THE HD 142527 PROTOPLANETARY DISK
复制标题
HD 142527 原行星盘中扭曲所投射的阴影
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
S. Casassus
中科院分区：
文献类型：
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作者：
Sebastián Marino;S. Pérez;S. Casassus
对原行星盘间隙的详细观察揭示了驱动当前对拱星盘研究的结构。一个这样的特征是沿着HD 142527系统的外盘沿着看到的两个强度零点，这在偏振差分成像中特别好地跟踪。在这里，我们提出，这些阴影投下的内部磁盘。就H带中的单位不透明度表面而言，内外盘都很厚，因此阴影的形状和方向可以反映系统的三维结构。在参数盘模型上的辐射传输预测允许我们得出结论，内外盘之间的相对倾角为70° ± 5°。这一发现挖掘了拱星盘高对比度成像的潜力，并对有间隙盘的气体动力学以及阴影区域的物理条件产生影响。
Detailed observations of gaps in protoplanetary disks have revealed structures that drive current research on circumstellar disks. One such feature is the two intensity nulls seen along the outer disk of the HD 142527 system, which are particularly well traced in polarized differential imaging. Here we propose that these are shadows cast by the inner disk. The inner and outer disk are thick, in terms of the unit-opacity surface in the H band, so that the shape and orientation of the shadows inform on the three-dimensional structure of the system. Radiative transfer predictions on a parametric disk model allow us to conclude that the relative inclination between the inner and outer disks is 70° ± 5°. This finding taps the potential of high-contrast imaging of circumstellar disks, and bears consequences on the gas dynamics of gapped disks, as well as on the physical conditions in the shadowed regions.