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

W. Lucas, Christiane Helling

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12 Citations (Scopus)


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$\sim$ch80/datasources.html
Original languageUndefined/Unknown
JournalMonthly Notices of the Royal Astronomical Society
Publication statusPublished - 1 Jun 2009


  • astro-ph.SR
  • astro-ph.GA

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