Abstract—

The topic of the present study is combining a dynamic model of a protoplanetary disk with the computations of radiation transfer for obtaining synthetic spectra and disk images suitable for immediate comparison of the model with observations. Evolution of the disk was computed using the FEOSAD hydrodynamic model, which includes a self-consistent calculation of the dynamics of dust and gas in the 2D thin disk approximation. Radiation transfer was simulated by the open code RADMC-3D. Three phases of disk evolution were considered: a young gravitationally unstable disk, a disk during an accretion luminosity burst, and an evolved disk. For these stages, the influence of various processes upon the disk’s thermal structure was analyzed, as well as the differences between the temperatures obtained in the initial dynamic model and in the model with a detailed calculation of the radiation transfer. It is shown that viscous heating in the inner regions and adiabatic heating in the disk spirals can be important sources of heating. On the basis of the calculated spectral energy distributions, using SED-fitter software package used for the observations, physical parameters of the model disks were reconstructed. A significant spread between reconstructed parameters and initial characteristics of the disk indicates verification necessity of the models within the framework of spatially resolved observations of disks in the different spectral ranges.

中文翻译：

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基于合成图像的气尘盘参数恢复

摘要-

本研究的主题是将原行星盘的动力学模型与辐射传输的计算相结合，以获得适合于立即将模型与观测结果进行比较的合成光谱和盘影像。使用FEOSAD流体动力学模型计算了磁盘的演化，该模型包括在二维薄磁盘近似中对粉尘和气体动力学的自洽计算。辐射传输由开放代码RADMC-3D模拟。考虑了磁盘演化的三个阶段：重力不稳定的年轻磁盘，吸积光度爆发期间的磁盘以及演化的磁盘。在这些阶段中，分析了各种过程对磁盘热结构的影响，以及在初始动态模型中以及在详细计算辐射传递的模型中获得的温度之间的差异。结果表明，内部区域的粘性加热和盘形螺旋中的绝热加热可能是重要的加热源。在计算出的光谱能量分布的基础上，使用用于观测的SED-fitter软件包，重建了模型盘的物理参数。磁盘的重构参数和初始特征之间的显着差异表明，在不同光谱范围内对磁盘进行空间分辨观测的框架内，需要对模型进行验证。结果表明，内部区域的粘性加热和盘形螺旋中的绝热加热可能是重要的加热源。在计算出的光谱能量分布的基础上，使用用于观测的SED-fitter软件包，重建了模型盘的物理参数。磁盘的重构参数和初始特征之间的显着差异表明，在不同光谱范围内对磁盘进行空间分辨观测的框架内，需要对模型进行验证。结果表明，内部区域的粘性加热和盘形螺旋中的绝热加热可能是重要的加热源。在计算出的光谱能量分布的基础上，使用用于观测的SED-fitter软件包，重建了模型盘的物理参数。磁盘的重构参数和初始特征之间的显着差异表明，在不同光谱范围内对磁盘进行空间分辨观测的框架内，需要对模型进行验证。