Hubble Space Telescope Advanced Camera for Surveys Coronagraphic Observations of the Dust Surrounding HD 100546
Hubble Space Telescope Advanced Camera for Surveys Coronagraphic Observations of the Dust Surrounding HD 100546
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哈勃太空望远镜先进相机，用于对周围尘埃进行日冕观测观测 HD 100546
DOI：
10.1086/519296
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
G. Illingworth
中科院分区：
文献类型：
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作者：
D. Ardila;D. Golimowski;J. Krist;M. Clampin;H. Ford;G. Illingworth
本文介绍了HST ACS在F435 W、F606 W和F814 W波段对HD 100546的日冕观测。HD 100546是一颗B9.5星星，距离太阳103 pc。散射光被探测到距离星星14“。观测结果与一个与内盘倾斜度相同的扩展扁平星云的存在是一致的。众所周知的“旋臂”被清楚地观察到，并跟踪旋转盘材料。以前从未报道过的较弱的武器也被发现。臂间空间变得更明亮，但在较长波长下，结构的颜色变得更加中性，这与假设它们是由于翘曲盘的影响的模型不一致。沿着盘主轴，散射光相对于星星的颜色是Δ（F435 W-F606 W）= 0.0-0.2等和Δ（F435 W-F814 W）= 0.5-1等。为了解释这些颜色，我们探索了非对称散射、红化和大的最小尺寸对ISM类颗粒的作用。我们的结论是，这些假设本身都不能解释颜色。圆盘的颜色与柯伊伯带天体的颜色相似，这表明它们的颜色可能是由相同的过程引起的。我们认为，我们只观察到的几何厚，光学薄信封的磁盘，而光学厚盘负责远红外发射是未检测到的。观察到的旋臂就是这个包层上的结构。这些颜色表明扩展的星云不是下落包层的残余物，而是经过再加工的盘状物质。
We present HST ACS coronagraphic observations of HD 100546, a B9.5 star, 103 pc away from the Sun, taken in the F435W, F606W, and F814W bands. Scattered light is detected up to 14'' from the star. The observations are consistent with the presence of an extended flattened nebula with the same inclination as the inner disk. The well-known "spiral arms" are clearly observed and trail the rotating disk material. Weaker arms never before reported are also seen. The interarm space becomes brighter, but the structures become more neutral in color at longer wavelengths, which is not consistent with models that assume that they are due to the effects of a warped disk. Along the major disk axis, the colors of the scattered light relative to the star are Δ(F435W - F606W) ≈ 0.0-0.2 mag and Δ(F435W - F814W) ≈ 0.5-1 mag. To explain these colors, we explore the role of asymmetric scattering, reddening, and large minimum sizes on ISM-like grains. We conclude that each of these hypotheses by itself cannot explain the colors. The disk colors are similar to those derived for Kuiper Belt objects, suggesting that the same processes responsible for their colors may be at work here. We argue that we are observing only the geometrically thick, optically thin envelope of the disk, while the optically thick disk responsible for the far-IR emission is undetected. The observed spiral arms are then structures on this envelope. The colors indicate that the extended nebulosity is not a remnant of the infalling envelope but reprocessed disk material.
Herbig Ae 星 HD 150193A 周围星周盘的近红外成像
DOI：
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发表时间：
2003
期刊：
Astrophysical J. 590
影响因子：
--
作者：
Fukagawa;M. 他
通讯作者：
M. 他
DOI：
10.1086/429658
发表时间：
2005-02
期刊：
The Astrophysical Journal
影响因子：
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作者：
Hidekazu Tanaka;Youhei Himeno;S. Ida
通讯作者：
Hidekazu Tanaka;Youhei Himeno;S. Ida