论文标题
北极区域的光球磁拓扑
Photospheric magnetic topology of a north polar region
论文作者
论文摘要
目标。当极区域逆转其主要的极性时，我们的目的是表征北极区域的大部分大部分的磁性。 方法。我们利用安装在瑞典太阳能望远镜上的清晰成像光谱仪的全光谱仪数据。数据由光电光谱线组成，该光谱线用于通过辐射传递方程的解决方案来推断不同安静的太阳区域的各种物理参数。我们将分析重点放在北极区域发现的特性上，并将其比较与在圆盘中心和低纬度安静的太阳区域相同的分析中进行比较。我们还分析了整个北极区域的磁结构的空间分布。 结果。我们发现，极性区域的物理特性（视线速度，磁通量，磁性倾斜和磁性方位角）与在圆盘中心的安静太阳中发现的物理特性兼容，并且与在靠近肢体的低纬度地区发现的物理特性相似。具体而言，极性区域磁性没有具体特征。从视线到本地参考框架的转换的结构可能带有大型磁通量（$> 10^{17} $ MX），并且处于极性不平衡，并具有主要的正极性，最大的（$> 10^{19} $ MX）位于低于$ 73^{\ circ} $ latitude $ 73^{\ circ} $ latitude。
Aims. We aim to characterise the magnetism of a large fraction of the north polar region close to a maximum of activity, when the polar regions are reversing their dominant polarity. Methods. We make use of full spectropolarimetric data from the CRisp Imaging Spectro-Polarimeter installed at the Swedish Solar Telescope. The data consist of a photospheric spectral line, which is used to infer the various physical parameters of different quiet Sun regions by means of the solution of the radiative transfer equation. We focus our analysis on the properties found for the north polar region and their comparison to the same analysis applied to data taken at disc centre and low-latitude quiet Sun regions for reference. We also analyse the spatial distribution of magnetic structures throughout the north polar region. Results. We find that the physical properties of the polar region (line-of-sight velocity, magnetic flux, magnetic inclination and magnetic azimuth) are compatible with those found for the quiet Sun at disc centre and are similar to the ones found at low latitudes close to the limb. Specifically, the polar region magnetism presents no specific features. The structures for which the transformation from a line-of-sight to a local reference frame was possible harbour large magnetic fluxes ($>10^{17}$ Mx) and are in polarity imbalance with a dominant positive polarity, the largest ones ($>10^{19}$ Mx) being located below $73^{\circ}$ latitude.
