Work

Rosseland and Planck mean opacities for protoplanetary discs

Year: 2003

Type: article

Abstract: 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 ~1500 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 K and gas densities ranging from 10-18 g cm-3 to 10-7 g cm-3. 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.

Source: Astronomy and Astrophysics

DOI: 10.1051/0004-6361:20031279

Authors: D. Semenov, Th. Henning, Ch. Helling, M. Ilgner, E. Sedlmayr

Institutions: Friedrich Schiller University Jena, Max Planck Institute for Astronomy, Technische Universität Berlin, University of Tübingen

Language: English

Topic: Astrophysics and Star Formation Studies

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: Deutsche Forschungsgemeinschaft, Max-Planck-Gesellschaft, Saint Petersburg State University

OpenAlex ID: W2162462253