arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.09746astro-ph.SR
收藏

太阳黑子半影的恢复过程

Restoring process of sunspot penumbra

P. Romano, M. Murabito, S. L. Guglielmino, F. Zuccarello, M. Falco

摘要:

本文描述了在活动区NOAA 12348的前一个黑子中观测到的一个黑子半影扇形的消失及其恢复过程。磁场和等离子体流的演化支持半影是由于冠层磁场倾角的变化而形成的观点。在太阳黑子半影的这一部分的解体阶段,观测到了移动的磁特征。在恢复阶段,我们没有观察到任何磁通量出现在太阳黑子周围。半影区的恢复过程在大约72小时内完成,并伴随着从逆Evershed流到经典Evershed流的过渡。IBIS对光球分光偏振测量的反演使我们能够重建磁场在半影新沉降期间的未梳理结构,即,磁场的垂直分量似乎逐渐被对应于脊柱内的一些水平场线所取代。

英文摘要:

We describe the disappearance of a sector of sunspot penumbra and its restoring process observed in the preceding sunspot of active region NOAA 12348. The evolution of the magnetic field and the plasma flows support the idea that the penumbra forms due to a change of inclination of the magnetic field of the canopy. Moving magnetic features have been observed during the disintegration phase of that sector of sunspot penumbra. During the restoring phase we have not observed any magnetic flux emergence around the sunspot. The restoring process of the penumbra sector completed in about 72 hours and it was accompanied by the transition from the counter-Evershed flow to the classical Evershed flow. The inversion of photospheric spectropolarimetric measurements taken by IBIS allowed us to reconstruct how the uncombed configuration of the magnetic field forms during the new settlement of the penumbra, i.e., the vertical component of the magnetic field seems to be progressively replaced by some horizontal field lines, corresponding to the intra-spines.

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。

↑