Substructure in the Circumstellar Disk Around the Young Star AU Microscopii
Substructure in the Circumstellar Disk Around the Young Star AU Microscopii
复制标题
年轻恒星周围星盘的子结构 AU Microscopii
作者：
Michael C. Liu
凯克自适应光学成像的物理分辨率为0.4天文单位（Au），可以分辨出显微镜座Au（Au Mic，GJ 803，HD 197481）的内部（15至80 Au）圆盘，这是已知距离地球最近的散射光圆盘。内盘是不对称的，在35 Au处结构发生急剧变化。在25- 40-Au间距处，盘也显示空间局部增强和缺陷。整体形态指向看不见的较大天体的影响，并类似于近期行星形成的预期结构。Au Mic与典型的碎片盘系统β Picture是同时代的，它们之间的相似之处表明它们的盘演化是同步的。在1200万年前的星周盘中，多个子结构的迹象似乎很常见。
Keck adaptive optics imaging with a physical resolution of 0.4 astronomical units (AU) resolves the inner (15 to 80 AU) disk of AU Microscopii (AU Mic, GJ 803, HD 197481), the nearest known scattered light disk to Earth. The inner disk is asymmetric and possesses a sharp change in structure at 35 AU. The disk also shows spatially localized enhancements and deficits at 25- to 40-AU separations. The overall morphology points to the influence of unseen larger bodies and resembles structures expected from recent planet formation. AU Mic is coeval with the archetypical debris disk system β Pictoris, and the similarities between their two disks point to synchronous disk evolution. Multiple indications of substructure appear to be common in circumstellar disks at an age of ≈12 million years.
影响因子：
3.2
作者：
V. Mannings;A. Boss;S. Russell
通讯作者：
V. Mannings;A. Boss;S. Russell