... project

This paper is dedicated to the memory of Hartmut Holweger.

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...(O) = 8.92

A(X) $\equiv \log~(N_{\rm X}/N_{\rm H}) +12$.

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... CO⁵BOLD

http://www.astro.uu.se/~bf/cobold/index.html

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... Castelli

http://wwwuser.oats.inaf.it/castelli/sun/ap00t5777g44377k1asp.dat

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... model

http://marcs.astro.uu.se/

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... Linfor3D

http://www.aip.de/mst/Linfor3D/linfor_3D_manual.pdf

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... Jungfraujoch

http://bass2000.obspm.fr/solar_spect.php

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... Database

http://physics.nist.gov/PhysRefData/ASD/index.html, Ralchenko (2005).

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... lines

Si I line: $\lambda = 629.9599$ nm, = -1.50, $\chi_{\rm lo}=5.948$ eV; Fe I line: $\lambda = 630.1501$ nm, = -0.72, $\chi_{\rm lo}=3.654$ eV.

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... respectively

Note, that the values given in Table 3 differ from the values here since they are based on matching the line EW, not line profile fitting.

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