CONSTRAINING THE PLANETARY SYSTEM OF FOMALHAUT USING HIGH-RESOLUTION ALMA OBSERVATIONS
CONSTRAINING THE PLANETARY SYSTEM OF FOMALHAUT USING HIGH-RESOLUTION ALMA OBSERVATIONS
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DOI：
10.1088/2041-8205/750/1/l21
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发表时间：
2012-03
期刊：
影响因子：
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通讯作者：
A. Boley;M. Payne;S. Corder;William R. F. Dent;Eric B. Ford;M. Shabram
中科院分区：
文献类型：
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作者：
A. Boley;M. Payne;S. Corder;William R. F. Dent;Eric B. Ford;M. Shabram
行星系统的动态演化在碎片盘中留下了可观测的特征。光学图像追踪微米大小的颗粒，这些颗粒受恒星辐射的强烈影响，不必与它们的母体种群一致。对毫米大小的颗粒的观测准确地追踪了母体，但以前的图像缺乏表征环形态所需的分辨率和灵敏度。在这里，我们展示了ALMA 350 GHz对北落师门碎片环的观测。这些观测结果表明，母体种群的宽度为13-19 AU，内外边界明显。我们讨论了环的三种可能的起源，并提出由牧羊人行星限制的碎片与环的形态最一致。
The dynamical evolution of planetary systems leaves observable signatures in debris disks. Optical images trace micron-sized grains, which are strongly affected by stellar radiation and need not coincide with their parent body population. Observations of millimeter-sized grains accurately trace parent bodies, but previous images lack the resolution and sensitivity needed to characterize the ring's morphology. Here we present ALMA 350 GHz observations of the Fomalhaut debris ring. These observations demonstrate that the parent body population is 13–19 AU wide with a sharp inner and outer boundary. We discuss three possible origins for the ring and suggest that debris confined by shepherd planets is the most consistent with the ring's morphology.