Photospheric Abundances: Problems, Updates, Implications

Details Photospheric Abundances: Problems, Updates, Implications Photospheric Abundances: Problems, Updates, Implications

2001-07-21

arxiv.org/abs/astro-ph/0107426v1

Astronomy and Astrophysics

Astrophysics

Invited Review (8 pages) to appear in "Solar and Galactic Composition", Ed. R.F. Wimmer-Schweingruber, AIP Conference Proceedi

Scientific paper

10.1063/1.1433974

Current problems encountered in the spectroscopic determination of photospheric abundances are outlined and exemplified in a reevaluation of C, N, O, Ne, Mg, Si, and Fe, taking effects of NLTE and granulation into account. Updated abundances of these elements are given in Table 2. Specific topics addressed are (1) the correlation between photospheric matter and CI chondrites, and the condensation temperature below which it breaks down (Figure 1), (2) the question whether the metallicity of the Sun is typical for its age and position in the Galaxy.

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