arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1003.1313astro-ph.SR
收藏

太阳黑子半影形成中出现的双极的作用

The role of emerging bipoles in the formation of a sunspot penumbra

R. Schlichenmaier, N. Bello Gonzalez, R. Rezaei, T. A. Waldmann

摘要:

太阳内部磁通量的产生及其从对流层向光球层、色球层和日冕的传输将是未来几十年太阳物理学研究的重点。人们计划用4米级望远镜测量辐射磁流体动力学的基本过程,这是了解太阳磁场性质所必需的。理解太阳磁场行为的一个关键因素是通量进入太阳光球层的过程,以及磁通量如何重组形成活动区的磁现象,如太阳黑子和孔隙。在这里,我们提出了一个分光偏振和成像数据集从新兴的磁通量,其中没有半影形成半影原点的区域。在半影的形成过程中,光斑的面积和磁通量增大。我们的数据分析的第一个结果表明,额外的磁通量,这有助于增加半影的面积,是由新兴的磁通量的区域提供。我们观察到新兴的双极对齐,使点极性更接近现场。当一个新出现的双极分离时,黑子极性的极点向黑子迁移,最后与黑子合并,我们推测这是黑子积累磁通量的一个基本过程。随着越来越多的通量积累,半影形成并将原黑子转变为成熟的黑子。

英文摘要:

The generation of magnetic flux in the solar interior and its transport from the convection zone into the photosphere, the chromosphere, and the corona will be in the focus of solar physics research for the next decades. With 4m class telescopes, one plans to measure essential processes of radiative magneto-hydrodynamics that are needed to understand the nature of solar magnetic fields. One key-ingredient to understand the behavior of solar magnetic field is the process of flux emergence into the solar photosphere, and how the magnetic flux reorganizes to form the magnetic phenomena of active regions like sunspots and pores. Here, we present a spectropolarimetric and imaging data set from a region of emerging magnetic flux, in which a proto-spot without penumbra forms a penumbra. During the formation of the penumbra the area and the magnetic flux of the spot increases. First results of our data analysis demonstrate that the additional magnetic flux, which contributes to the increasing area of the penumbra, is supplied by the region of emerging magnetic flux. We observe emerging bipoles that are aligned such that the spot polarity is closer to the spot. As an emerging bipole separates, the pole of the spot polarity migrates towards the spot, and finally merges with it. We speculate that this is a fundamental process, which makes the sunspot accumulate magnetic flux. As more and more flux is accumulated a penumbra forms and transforms the proto-spot into a fully-fledged sunspot.

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。

↑