A Keplerian Disk around the Herbig Ae Star HD 169142
A Keplerian Disk around the Herbig Ae Star HD 169142
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Herbig Ae 星周围的开普勒圆盘 HD 169142
DOI：
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发表时间：
2005
期刊：
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通讯作者：
M. Hogerheijde
中科院分区：
文献类型：
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作者：
A. Raman;M. Lisanti;D. Wilner;C. Qi;M. Hogerheijde
我们展示了 Herbig Ae 星 HD 169142 的亚毫米阵列观测结果，其分辨率为 1.3 mm 连续谱发射和 12CO J = 2-1 线发射，分辨率为 ∼1."5，揭示了星周盘。连续发射以恒星位置为中心并进行解析，它为圆盘提供了 ~0.02 M⊙ 的质量估计。 CO图像显示了位置和速度的模式，与开普勒旋转中与视线倾斜度较低的圆盘很好地匹配。我们使用基于喇叭形被动圆盘模型的辐射传输计算，通过与谱线发射进行比较来约束圆盘参数。导出的圆盘半径为235 AU，倾角为13°。该模型还需要适度消耗 CO 分子，类似于金牛座 T 星周围的开普勒圆盘中发现的情况。
We present Submillimeter Array observations of the Herbig Ae star HD 169142 in 1.3 mm continuum emission and 12CO J = 2-1 line emission at ∼1.″5 resolution that reveal a circumstellar disk. The continuum emission is centered on the star position and resolved, and it provides a mass estimate of ∼0.02 M⊙ for the disk. The CO images show patterns in position and velocity that are well matched by a disk in Keplerian rotation with low inclination to the line of sight. We use radiative transfer calculations based on a flared, passive disk model to constrain the disk parameters by comparison to the spectral line emission. The derived disk radius is 235 AU, and the inclination is 13°. The model also necessitates modest depletion of the CO molecules, similar to that found in Keplerian disks around T Tauri stars.