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arXiv 1102.1397astro-ph.SR
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从冠层到互联网的磁通量传输

Transport of magnetic flux from the canopy to the internetwork

A. Pietarila, R. H. Cameron, S. Danilovic, S. K. Solanki

摘要:

最近的观测表明,在互联网安静的太阳中,8%的线性偏振补丁完全嵌入下行流中。这些都不容易解释的互联网领域的来源,依赖于流量从下面出现的典型场景。我们探索使用辐射MHD模拟的情况下,磁通量从覆盖互联网的磁冠层传输到光球通过向下的羽流与对流过冲。我们发现,如果在模拟中存在类似冠层的磁场,从冠层的通量传输是一个重要的过程播种的光球层的互联网络与磁场。我们认为这种机制也与太阳有关,它可以自然地解释观察到的完全嵌入下行流中的网络间线性偏振补丁。

英文摘要:

Recent observations have revealed that 8% of linear polarization patches in the internetwork quiet Sun are fully embedded in downflows. These are not easily explained with the typical scenarios for the source of internetwork fields which rely on flux emergence from below. We explore using radiative MHD simulations a scenario where magnetic flux is transported from the magnetic canopy overlying the internetwork into the photosphere by means of downward plumes associated with convective overshoot. We find that if a canopy-like magnetic field is present in the simulation, the transport of flux from the canopy is an important process for seeding the photospheric layers of the internetwork with magnetic field. We propose that this mechanism is relevant for the Sun as well, and it could naturally explain the observed internetwork linear polarization patches entirely embedded in downflows.

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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