颗粒物理与Rosseland平均不透明度
Grain Physics and Rosseland Mean Opacities
摘要：
在从恒星演化模型到原行星盘的各种天体物理模拟中，平均不透明度表经常被用来计算辐射的传输。通常情况下，表，如弗格森等人（2005），是用一组预定的物理假设计算的，这些假设可能对特定应用有效，也可能无效。本文探讨了在富氧环境中，谷物物理学的几个假设对Rosseland平均不透明度的影响。我们发现，改变粒度的分布，无论是幂律指数或分布的形状，总平均不透明度有边际效应。我们还探讨了固体均匀颗粒和多孔或几个物种的conglomorations颗粒之间的平均不透明度的差异。通过假设颗粒与气体的比率来改变平均值中包含的颗粒不透明度的量会显著影响平均不透明度，但以可预测的方式。
英文摘要：
Tables of mean opacities are often used to compute the transfer of radiation in a variety of astrophysical simulations from stellar evolution models to proto-planetary disks. Often tables, such as Ferguson et al. (2005), are computed with a predetermined set of physical assumptions that may or may not be valid for a specific application. This paper explores the effects of several assumptions of grain physics on the Rosseland mean opacity in an oxygen rich environment. We find that changing the distribution of grain sizes, either the power-law exponent or the shape of the distribution, has a marginal effect on the total mean opacity. We also explore the difference in the mean opacity between solid homogenous grains and grains that are porous or conglomorations of several species. Changing the amount of grain opacity included in the mean by assuming a grain-to-gas ratio significantly affects the mean opacity, but in a predictable way.
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。
