ÆSOPUS 2.0: Low-temperature Opacities with Solid Grains
In this study we compute the equation of state and Rosseland mean opacity from temperatures of T ≃ 30,000 K down to T ≃ 400 K, pushing the capabilities of the Æ SOPUS code into the regime where solid grains can form. The GGchem code is used to solve the chemistry for temperatures less than ≃3000 K....
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| Veröffentlicht in: | The Astrophysical journal 2024-01, Vol.960 (1), p.18 |
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| creator | Marigo, Paola Woitke, Peter Tognelli, Emanuele Girardi, Léo Aringer, Bernhard Bressan, Alessandro |
| description | In this study we compute the equation of state and Rosseland mean opacity from temperatures of T ≃ 30,000 K down to T ≃ 400 K, pushing the capabilities of the Æ SOPUS code into the regime where solid grains can form. The GGchem code is used to solve the chemistry for temperatures less than ≃3000 K. Atoms, molecules, and dust grains in thermodynamic equilibrium are all included in the equation of state. To incorporate monochromatic atomic and molecular cross sections, an optimized opacity sampling technique is used. The Mie theory is employed to calculate the opacity of 43 grain species. Tables of Rosseland mean opacities for scaled-solar compositions are provided. Based on our computing resources, opacities for other chemical patterns, as well as various grain sizes, porosities, and shapes, can be easily computed upon user request to the corresponding author. |
| doi_str_mv | 10.3847/1538-4357/ad0898 |
| format | Article |
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| subjects | Astrochemistry Astrophysics Carbonaceous grains Equations of state Grain size Low temperature Mie scattering Mie theory Opacity Sampling techniques Silicate grains Stellar atmospheric opacity Thermodynamic equilibrium |
| title | ÆSOPUS 2.0: Low-temperature Opacities with Solid Grains |
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