PASJ: Publications of the Astronomical Society of Japan | |
Albedo of an irradiated plane-parallel atmosphere with finite optical depth | |
Fukue, Jun1  | |
[1] Astronomical Institute, Osaka Kyoiku University, Asahigaoka, Kashiwara, Osaka 582-8582, Japan | |
关键词: accretion, accretion disks; radiative transfer; planets and satellites: atmospheres; protoplanetary disks; stars: atmospheres; | |
DOI : 10.1093/pasj/psy002 | |
学科分类:天文学(综合) | |
来源: Oxford University Press | |
【 摘 要 】
We analytically derive albedo for a plane-parallel atmosphere with finite optical depth, irradiated by an external source, under the local thermodynamic equilibrium approximation. Albedo is expressed as a function of the photon destruction probability ε and optical depth τ, with several parameters such as dilution factors of the external source. In the particular case of the infinite optical depth, albedo A is expressed as |$A=[1 + (1-W_J/W_H)\sqrt{3\varepsilon }/3]/(1+\sqrt{3\varepsilon })$|, where WJ and WH are the dilution factors for the mean intensity and Eddington flux, respectively. An example of a model atmosphere is also presented under a gray approximation.
【 授权许可】
CC BY
【 预 览 】
Files | Size | Format | View |
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RO201910250861731ZK.pdf | 707KB | download |