Computing Solar Absolute Fluxes

Details Computing Solar Absolute Fluxes Computing Solar Absolute Fluxes

2007-09-14

arxiv.org/abs/0709.2194v1

Astronomy and Astrophysics

Astrophysics

11 pages, 2 figures; proceedings of the conference "New Quests in Stellar Astrophysics II: The Ultraviolet Properties of Evolv

Scientific paper

Computed color indices and spectral shapes for individual stars are routinely compared with observations for essentially all spectral types, but absolute fluxes are rarely tested. We can confront observed irradiances with the predictions from model atmospheres for a few stars with accurate angular diameter measurements, notably the Sun. Previous calculations have been hampered by inconsistencies and the use of outdated atomic data and abundances. I provide here a progress report on our current efforts to compute absolute fluxes for solar model photospheres. Uncertainties in the solar composition constitute a significant source of error in computing solar radiative fluxes.

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