Gas in the Planet-Forming Region of Circumstellar Disks: Exploiting the Mid-IR Molecular Forest

恒星盘行星形成区域中的气体：利用中红外分子森林

• 批准号: 1109857
• 负责人: Geoffrey Blake
• 金额: $ 43.78万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1109857&HistoricalAwards=false
• 关键词: Gas; Planet; Forming; Region; Circumstellar

Dr. Blake and his team study the chemistry and physics of the innermost regions (0.5-50 AU) of very young circumstellar disks. The project uses of ground-based (Keck-NIRSPEC, VLT-CRIRES, Gemini-MICHELLE) spectroscopy and spectro-astrometry of accretion disks. The rovibrational line emissions of the molecules CO, HCN, C2H2, H2O, OH, and other molecules are used to constrain the physical and chemical structure and evolution of the protoplanetary disks' inner regions. These observations are interpreted with 2D (axisymetric) and 3D radiative transfer models. In order to derive accurate molecular abundances, the group will extend their radiative transfer codes to generate non-local thermodynamic equilibrium level populations relevant for IR transitions. Further studies are planned for the outer disks using far IR and submm lines from Herschel and potentially ALMA. The project provides training for a PhD student and postdoc.

Blake博士和他的团队研究了非常年轻的Internelar磁盘的最终地区（0.5-50 au）的化学和物理。地面基（Keck-nirspec，VLT-Crires，Gemini-Michelle）光谱和积聚磁盘的光谱法的项目使用。分子CO，HCN，C2H2，H2O，OH和其他分子的旋转线排放用于约束原行星磁盘内部区域的物理和化学结构以及进化。这些观察结果用2D（轴法）和3D辐射转移模型来解释。为了得出准确的分子丰度，该组将扩展其辐射转移代码，以产生与IR转型相关的非本地热力学平衡水平种群。计划使用Herschel和潜在的Alma的远红外线和Obsm线对外磁盘进行进一步的研究。该项目为博士生和博士后提供培训。