年轻恒星周围圆盘的连续体和线模型。I. Herschel/GASPS的300000个圆盘模型
Continuum and line modelling of discs around young stars. I. 300000 disc models for Herschel/GASPS
摘要：
我们结合了热化学光盘代码ProDiMo与蒙特卡罗辐射转移代码MCFOST计算网格的~300000拱星盘模型，系统地改变11恒星，光盘和尘埃参数，包括总光盘质量，几个光盘形状参数和尘埃气体比。对每个模型，计算了[OI]、[CII]、~（12）CO和o/p-H_2 O在5种倾角下的29条远红外、亚毫米和毫米波段谱线的连续谱和谱线辐射转移。该网格允许研究的输入参数对观测值的影响，对不同类型的拱星盘的统计预测，并找到系统的趋势和参数之间的相关性，连续通量，和线通量。模型网格，包括计算的光盘温度和化学结构，计算的SED，线通量和配置文件，将特别用于赫歇尔开放时间关键程序GASPS的数据解释。计算的线通量显示出强烈的依赖于假设的紫外线过剩的中心恒星，并在光盘耀斑。预测[OI]和[CII]精细结构线通量高于Herschel/PACS和Spica/SAFARI检测限的模型的分数计算为光盘质量的函数。本文讨论了从线观测导出盘状气体质量的可能性。
英文摘要：
We have combined the thermo-chemical disc code ProDiMo with the Monte Carlo radiative transfer code MCFOST to calculate a grid of ~300000 circumstellar disc models, systematically varying 11 stellar, disc and dust parameters including the total disc mass, several disc shape parameters and the dust-to-gas ratio. For each model, dust continuum and line radiative transfer calculations are carried out for 29 far IR, sub-mm and mm lines of [OI], [CII], 12CO and o/p-H2O under 5 inclinations. The grid allows to study the influence of the input parameters on the observables, to make statistical predictions for different types of circumstellar discs, and to find systematic trends and correlations between the parameters, the continuum fluxes, and the line fluxes. The model grid, comprising the calculated disc temperatures and chemical structures, the computed SEDs, line fluxes and profiles, will be used in particular for the data interpretation of the Herschel open time key programme GASPS. The calculated line fluxes show a strong dependence on the assumed UV excess of the central star, and on the disc flaring. The fraction of models predicting [OI] and [CII] fine-structure lines fluxes above Herschel/PACS and Spica/SAFARI detection limits are calculated as function of disc mass. The possibility of deriving the disc gas mass from line observations is discussed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
