Rosseland and Planck mean opacities for protoplanetary discs

D Semenov; Th Henning; Christiane Helling; M Ilgner; E Sedlmayr

doi:10.1051/0004-6361:20031279

Rosseland and Planck mean opacities for protoplanetary discs

D Semenov, Th Henning, Christiane Helling, M Ilgner, E Sedlmayr

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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 similar to1500 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 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.

Original language	English
Pages (from-to)	611-621
Number of pages	14
Journal	Astronomy & Astrophysics
Volume	410
Issue number	2
DOIs	https://doi.org/10.1051/0004-6361:20031279
Publication status	Published - Nov 2003

Keywords

accretion, accretion discs
hydrodynamics
atomic processes
molecular processes
stars : planetary systems : protoplanetary discs
NONLINEAR MODEL PULSATIONS
CARBON DUST OXIDATION
LONG-PERIOD CEPHEIDS
ACCRETION DISKS
STELLAR ATMOSPHERES
INTERSTELLAR GRAINS
MOLECULAR OPACITIES
CONTINUOUS ABSORPTION
PROTOSTELLAR CORES
INFRARED-SPECTRUM

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title = "Rosseland and Planck mean opacities for protoplanetary discs",

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 similar to1500 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 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.",

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author = "D Semenov and Th Henning and Christiane Helling and M Ilgner and E Sedlmayr",

year = "2003",

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doi = "10.1051/0004-6361:20031279",

language = "English",

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T1 - Rosseland and Planck mean opacities for protoplanetary discs

AU - Semenov, D

AU - Henning, Th

AU - Helling, Christiane

AU - Ilgner, M

AU - Sedlmayr, E

PY - 2003/11

Y1 - 2003/11

N2 - 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 similar to1500 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 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.

AB - 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 similar to1500 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 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.

KW - accretion, accretion discs

KW - hydrodynamics

KW - atomic processes

KW - molecular processes

KW - stars : planetary systems : protoplanetary discs

KW - NONLINEAR MODEL PULSATIONS

KW - CARBON DUST OXIDATION

KW - LONG-PERIOD CEPHEIDS

KW - ACCRETION DISKS

KW - STELLAR ATMOSPHERES

KW - INTERSTELLAR GRAINS

KW - MOLECULAR OPACITIES

KW - CONTINUOUS ABSORPTION

KW - PROTOSTELLAR CORES

KW - INFRARED-SPECTRUM

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DO - 10.1051/0004-6361:20031279

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SN - 0004-6361

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SP - 611

EP - 621

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

IS - 2

ER -

Rosseland and Planck mean opacities for protoplanetary discs

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Keywords

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