2009/06/01 by Ch. Helling, W. Lucas, William E. Lucas · 2 citations
Chemistry · Physics and Astronomy · #Abundance (ecology) #Advanced Chemical Physics Studies #Analytical Chemistry (journal) #Astrophysics #Astrophysics and Star Formation Studies #Hydrogen #Opacity #Optics #Oxygen #Physics #Planck #Spectroscopy and Laser Applications #astro-ph.GA #astro-ph.SR
paper · pdf · doi:10.1111/j.1365-2966.2009.15164.x
10 pages, accepted for publication in MNRAS
arxiv created 2009/06/01 · openalex publication_date 2009/08/13 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
We present a set of gas-phase Planck mean and Rosseland mean opacity tables applicable for simulations of star and planet formation, stellar evolution and disc modelling at various metallicities in hydrogen-rich environments. The tables are calculated for gas temperatures between 1000 and 10 000 K and total hydrogen number densities between 102 and 1017 cm−3. The carbon-to-oxygen ratio is varied from 0.43 to well above 2.0, the nitrogen-to-oxygen ratio between 0.14 and 100.0. The tables are calculated for a range of metallicities down to [M/H]′= log NM/NH=−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 et al., and we provide additional tables for the oxygen abundance value from Caffau et al. All tables will be available online at http://star-www.st-and.ac.uk/~ch80/datasources.html.