当前位置: X-MOL 学术Sol. Phys. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Nonaxisymmetric Component of Solar Activity: the Vector of the Longitudinal Asymmetry
Solar Physics ( IF 2.7 ) Pub Date : 2020-06-01 , DOI: 10.1007/s11207-020-01651-x
E. S. Vernova , M. I. Tyasto , D. G. Baranov , O. A. Danilova

The vector representation of sunspots is used to study the nonaxisymmetric features of the solar activity distribution (sunspot data from Greenwich–USAF/NOAA, 1874–2016). Each sunspot is represented by a polar vector with modulus equal to the sunspot area and the phase equal to the sunspot heliolongitude. The vector sum of these individual vectors defines both the magnitude of the longitudinal asymmetry and the dominating longitude of the sunspot distribution. These characteristics are to a large extent free from the influence of a stochastic component and emphasize the nonaxisymmetric component of the solar activity. The longitudinal asymmetry follows the 11-year solar cycle with the amplitude three times lower than the sunspot area maximum. Longitudinal asymmetry is mostly determined by large sunspots: 82% of the longitudinal asymmetry is given by sunspots with area from 100 to 2000 MSH. Longitudinal asymmetries of the northern and southern hemispheres are connected only weakly (correlation coefficient R = 0.29 $R = 0.29$ ). The longitudinal distribution displays a maximum at the longitude ∼ 180 ∘ $\sim 180^{\circ }$ during ascent-maximum and at ∼ 0 ∘ / 360 ∘ $\sim 0^{\circ }/360^{\circ }$ during descent-minimum. The active longitude changes with the reversals of polarity of the local (minimum of solar activity) and global magnetic fields (reversal of polar magnetic field).

中文翻译:

太阳活动的非轴对称分量:纵向不对称向量

太阳黑子的矢量表示用于研究太阳活动分布的非轴对称特征(来自格林威治-美国空军/美国国家海洋和大气管理局的太阳黑子数据,1874-2016)。每个太阳黑子由一个极向量表示,其模数等于太阳黑子面积,相位等于太阳黑子日经度。这些单独矢量的矢量和定义了太阳黑子分布的纵向不对称程度和主要经度。这些特性在很大程度上不受随机分量的影响,并强调了太阳活动的非轴对称分量。纵向不对称性遵循 11 年的太阳周期,其振幅比太阳黑子区域最大值低三倍。纵向不对称主要由大太阳黑子决定:82% 的纵向不对称是由面积从 100 到 2000 MSH 的太阳黑子给出的。北半球和南半球的纵向不对称性只有微弱的联系(相关系数 R = 0.29 $R = 0.29$ )。纵向分布在经度 ∼ 180 ∘ $\sim 180^{\circ }$ 和上升最大值期间显示最大值,在 ∼ 0 ∘ / 360 ∘ $\sim 0^{\circ }/360^{\circ } $ 在下降期间最低。活动经度随着局部(太阳活动最小)和全球磁场(极地磁场的逆转)的极性反转而变化。纵向分布在经度 ∼ 180 ∘ $\sim 180^{\circ }$ 和上升最大值期间显示最大值,在 ∼ 0 ∘ / 360 ∘ $\sim 0^{\circ }/360^{\circ } $ 在下降期间最低。活动经度随着局部(太阳活动最小)和全球磁场(极地磁场的逆转)的极性反转而变化。纵向分布在经度 ∼ 180 ∘ $\sim 180^{\circ }$ 和上升最大值期间显示最大值,在 ∼ 0 ∘ / 360 ∘ $\sim 0^{\circ }/360^{\circ } $ 在下降期间最低。活动经度随着局部(太阳活动最小)和全球磁场(极地磁场的逆转)的极性反转而变化。
更新日期:2020-06-01
down
wechat
bug