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arXiv 0909.4121astro-ph.SR
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根据观测结果测试3D太阳模型

Testing 3D solar models against observations

Tiago M. D. Pereira, Martin Asplund, Dan Kiselman

摘要:

我们提出了一系列的观测测试的结果,三维和一维太阳模型。特别是,重点是原子氧线的形成,用于获得备受争议的太阳氧光球丰度。使用高质量的观测获得的瑞典太阳望远镜(SST),我们研究的O I线的中心到肢体的变化,测试模型和线的形成(LTE和非LTE)。对于O I 777 nm三重态,中心到边缘的变化在非LTE线形成中设置了强约束,并且用于导出中性氢碰撞的经典Drawin配方的经验校正因子(S_H)。利用SST数据的空间分辨特征,还研究了用于测试3D模型和线形成的附加框架。从测试中,我们证实,所采用的三维模型是现实的,它的预测与观测吻合得很好。

英文摘要:

We present results from a series of observational tests to 3D and 1D solar models. In particular, emphasis is given to the line formation of atomic oxygen lines, used to derive the much debated solar oxygen photospheric abundance. Using high-quality observations obtained with the Swedish Solar Telescope (SST) we study the centre-to-limb variation of the O I lines, testing the models and line formation (LTE and non-LTE). For the O I 777 nm triplet, the centre-to-limb variation sets strong constraints in the non-LTE line formation, and is used to derive an empirical correction factor (S_H) to the classical Drawin recipe for neutral hydrogen collisions. Taking advantage of the spatially-resolved character of the SST data, an additional framework for testing the 3D model and line formation is also studied. From the tests we confirm that the employed 3D model is realistic and its predictions agree very well with the observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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