An algorithm for Monte Carlo time-dependent radiation transfer
An algorithm for Monte Carlo time-dependent radiation transfer
复制标题
蒙特卡罗时间相关辐射传输算法
DOI：
--
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
T. Harries
中科院分区：
文献类型：
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作者：
T. Harries
提出了一种新的蒙特卡罗算法，用于在局部热力学平衡假设下计算随时间变化的辐射传输。与通量有限扩散不同，该方法是多色的，包括散射，并且能够同时处理光学厚和自由流区域。该算法在各种一维和二维问题上进行了测试，发现与基准解决方案具有良好的一致性。该方法用于计算吸积光度变化的原恒星照亮的星周盘的时变光谱能量分布。结果表明，光学变化性和红外变化性之间的时滞是由光子传播时间和盘中的热响应的组合产生的，并且该滞后是波长的近似线性函数。
A new Monte Carlo algorithm for calculating time-dependent radiative transfer under the assumption of local thermodynamic equilibrium is presented. Unlike flux-limited diffusion, the method is polychromatic, includes scattering, and is able to treat the optically-thick and free-streaming regimes simultaneously. The algorithm is tested on a variety of 1D and 2D problems, and good agreement with benchmark solutions is found. The method is used to calculate the time-varying spectral energy distribution from a circumstellar disc illuminated by a protostar whose accretion luminosity is varying. It is shown that the time-lag between the optical variability and the infrared variability results from a combination of the photon traveltime and the thermal response in the disc, and that the lag is an approximately linear function of wavelength.
DOI：
10.1111/j.1365-2966.2009.16199.x
发表时间：
2009-12
影响因子：
4.8
作者：
D. Acreman;T. Harries;D. Rundle
通讯作者：
D. Acreman;T. Harries;D. Rundle