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arXiv 0709.2194astro-ph
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计算太阳绝对通量

Computing Solar Absolute Fluxes

Carlos Allende Prieto

摘要:

计算的颜色指数和光谱形状的个别恒星通常与观察基本上所有的光谱类型,但绝对通量很少测试。我们可以将观测到的辐照度与模型大气的预测进行比较,这些模型大气具有精确的角直径测量,特别是太阳。以前的计算受到不一致和使用过时的原子数据和丰度的阻碍。我在这里提供一个进展报告,我们目前的努力,计算绝对通量的太阳模型光球。太阳成分的不确定性是计算太阳辐射通量的一个重要误差源。

英文摘要:

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 Previous calculations have been hampered by inconsistencies and the use of outdated atomic data and abundances.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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