Role of input atomic data in spectroscopic analyses of the Sun and metal-poor stars

Details Role of input atomic data in spectroscopic analyses of the Sun and metal-poor stars Role of input atomic data in spectroscopic analyses of the Sun and metal-poor stars

2011-04-08

arxiv.org/abs/1104.1640v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

7 pages, proceedings of the Workshop "Uncertainties in Atomic Data and How They Propagate in Chemical Abundances", Instituto d

Scientific paper

Analysis of high-resolution stellar spectra relies heavily upon atomic data. These include energy levels, wavelengths, cross-sections for various types of interactions between particles and photons, such as photoionization and collision induced transitions. Quantum-mechanical calculations provide largest part of these data. In this paper I describe atomic data necessary to compute model atmospheres and line formation for the late-type stars both in the assumption of local thermodynamic equilibrium (LTE) and in a more general case of non-LTE. I will focus on transition metals with 21 < Z < 29 and discuss whether (and where) more complete and/or accurate atomic data are necessary.

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