Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 464, Issue 1, Pages 264-273Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw2445
Keywords
line: formation; radiative transfer; methods: numerical; Sun: abundances; Sun: atmosphere; Sun: photosphere
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Funding
- Australian Research Council (ARC) grant [FL110100012]
- Australian Government
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We present 3D non-local thermodynamic equilibrium (non-LTE) radiative transfer calculations for silicon in the solar photosphere, using an extensive model atom that includes recent, realistic neutral hydrogen collisional cross-sections. We find that photon losses in the Si I lines give rise to slightly negative non-LTE abundance corrections of the order of -0.01 dex. We infer a 3D non-LTE-based solar silicon abundance of lg is an element of Si circle dot = 7.51 dex. With silicon commonly chosen to be the anchor between the photospheric and meteoritic abundances, we find that the meteoritic abundance scale remains unchanged compared with the Asplund et al. and Lodders et al. results.
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