Gas phase mean opacities for varying [M/H], N/O, and C/O

Abstract

We present a set of gas-phase Planck mean and Rosseland mean opacity tables applicable for simulations of star and planet formation, stellar evolution, disk modelling at various metallicities in hydrogen-rich environments. The tables are calculated for gas temperatures between 1000K and 10000K and total hydrogen number densities between 10^2 cm^-3 and 10^17 cm^-3. The carbon-to-oxygen ratio is varied from 0.43 to well above 2.0, the nitrogen-to-oxygen ration between 0.14 and 100.0. The tables are calculated for a range of metallicities down to [M/H]'= log N_M/N_H=-7.0. We demonstrate how the mean opacities and the abundances of the opacity species vary with C/O, N/O, and [M/H]'. We use the element abundances from Grevesse, Asplund & Sauval (2007), and we provide additional tables for the oxygen-abundance value from Caffau et al.(2008). All tables will be available online under http://star-www.st-and.ac.uk/$\sim$ch80/datasources.html

10 pages, accepted for publication in MNRAS

References in corpus (10)

• The photospheric solar oxygen project: I. Abundance analysis of atomic lines and influence of atmospheric models
• Too little radiation pressure on dust in the winds of oxygen-rich AGB stars
• Complexity on Small Scales III: Iron and alpha Element Abundances in the Carina Dwarf Spheroidal Galaxy
• New Extremely Metal-Poor Stars in the Galactic Halo
• Dust-driven Winds and Mass Loss of C-rich AGB Stars with subsolar Metallicities
• Low temperature Rosseland opacities with varied abundances of carbon and nitrogen
• On the Use of Blanketed Atmospheres as Boundary Conditions for Stellar Evolutionary Models
• Cool luminous stars: the hybrid nature of their infrared spectra -- Carbon, oxygen, and their isotopic abundances in 23 K - M giant stars
• A H13CN/HN13C linelist, model atmospheres and synthetic spectra for carbon stars
• Grids of stellar evolution models for asteroseismology (CESAM + POSC)

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