Rosseland and Planck Mean Opacities for Protoplanetary Discs
In this paper, we present mean gas and dust opacities relevant to the physical conditions typical of protoplanetary discs. As the principal absorber for temperatures below ~1,500 K, we consider spherical and aggregate dust particles of various sizes, chemical structure, and porosity, consisting of i...
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| Veröffentlicht in: | arXiv.org 2003-08 |
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| creator | Semenov, D Henning, Th Helling, Ch Ilgner, M Sedlmayr, E |
| description | In this paper, we present mean gas and dust opacities relevant to the physical conditions typical of protoplanetary discs. As the principal absorber for temperatures below ~1,500 K, we consider spherical and aggregate dust particles of various sizes, chemical structure, and porosity, consisting of ice, organics, troilite, silicates, and iron. For higher temperatures, ions, atoms, molecules, and electrons are included as the main opacity sources. Rosseland and Planck mean opacities are calculated for temperatures between 5 K and 10,000 K and gas densities ranging from 10^{-18} g/ccm to 10^{-7} g/ccm. The dependence on the adopted model of dust grains is investigated. We compare our results with recent opacity tables and show how different opacity models affect the calculated hydrodynamical structure of accretion discs. |
| doi_str_mv | 10.48550/arxiv.0308344 |
| format | Article |
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| source | Free E- Journals |
| subjects | Accretion disks Dependence Deposition Dust Opacity Organic chemistry Planet formation Porosity Protoplanets Silicates Troilite |
| title | Rosseland and Planck Mean Opacities for Protoplanetary Discs |
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