Mid-Infrared Images of the Debris Disk around HD 141569
Mid-Infrared Images of the Debris Disk around HD 141569
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HD 141569 附近碎片盘的中红外图像
DOI：
10.1086/340488
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Ressler
中科院分区：
文献类型：
--
作者：
K. Marsh;M. Silverstone;E. Becklin;D. Koerner;M. W. Werner;A. Weinberger;M. Ressler
我们用凯克II望远镜在λ = 12.5、17.9和20.8 μm对A0 Ve/B9.5 Ve星星HD 141569（D = 99 pc）周围的星周碎片盘进行了成像，并证实了最近发表的中红外观测的一般形态。模型拟合到一个假设的平坦的径向对称尘埃盘，得到倾斜轴的倾角i = 53° ± 5°，位置角为-6° ± 4°，并表明在距离星星30 Au（0.″3）的径向距离内存在光学深度约为4倍的凹陷。这样的抑郁症是暗示的密度耗尽，是一致的，与公布的光谱能量分布表明，即使存在中红外过量的近红外过量的情况下。我们的中红外结果，结合以前发表的近红外散射图像，表明这两个波长制度正在观看，分别是一个共同的磁盘结构，这是占主导地位的小（可能是亚微米）颗粒的内部和外部。
We have imaged the circumstellar debris disk around the A0 Ve/B9.5 Ve star HD 141569 (D = 99 pc), at λ = 12.5, 17.9, and 20.8 μm using the Keck II telescope, and confirm the general morphology from other recently published mid-infrared observations. Model fits to an assumed flat radially symmetric dust disk yield an inclination i = 53° ± 5° and a position angle of -6° ± 4° for the tilt axis and indicate the presence of a depression in optical depth by a factor of about 4 within a radial distance of 30 AU (0.″3) from the star. Such a depression is suggestive of a density depletion and is consistent with published spectral energy distributions that indicate the absence of a near-infrared excess even though a mid-infrared excess is present. Our mid-infrared results, in conjunction with previously published near-infrared scattering images, suggest that the two wavelength regimes are viewing, respectively, the inner and outer parts of a common disk structure, which is dominated by small (probably submicron) grains throughout.
影响因子：
3.2
作者：
V. Mannings;A. Boss;S. Russell
通讯作者：
V. Mannings;A. Boss;S. Russell