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3D non-LTE line formation of neutral carbon in the Sun

Amarsi, Anish M.; Barklem, P. S.; Collet, R.; Grevesse, N.; Asplund, Martin

Description

Carbon abundances in late-type stars are important in a variety of astrophysical contexts. However C I lines, one of the main abundance diagnostics, are sensitive to departures from local thermodynamic equilibrium (LTE). We present a model atom for non-LTE analyses of C I lines, that uses a new, physically-motivated recipe for the rates of neutral hydrogen impact excitation. We analyse C I lines in the solar spectrum, employing a three-dimensional (3D) hydrodynamic model solar atmosphere and 3D...[Show more]

CollectionsANU Research Publications
Date published: 2019-04-19
Type: Journal article
URI: http://hdl.handle.net/1885/240604
Source: Astronomy and Astrophysics
DOI: 10.1051/0004-6361/201833603
Access Rights: Open Access

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