不同日心角下的近红外网络光谱偏振测量
Near-IR internetwork spectro-polarimetry at different heliocentric angles
摘要：
在太阳表面不同区域的互联网上对近红外光谱偏振数据的分析可以提供限制，以拒绝这些安静区域的当前建模。我们目前的光谱偏振观测非常安静的地区的不同值的日心角的Fe I线在1.56微米，从光盘中心的位置接近肢体。数据的空间分辨率为0.7 - 1 "。我们分析了直接可观察到的属性的斯托克斯配置文件的圆偏振和线偏振的振幅以及总的偏振度。还研究了面积和振幅的不对称性。我们没有发现任何显着的变化的偏振信号的性质与日心角。这意味着太阳互联网的磁性保持不变，无论在太阳圆盘上的位置如何。这一观察事实排除了将互联网络建模为类似网络场景的可能性。在我们的空间分辨率下观测，网络间区域的磁性元素似乎是各向同性分布的。
英文摘要：
The analysis of near infrared spectropolarimetric data at the internetwork at different regions on the solar surface could offer constraints to reject current modeling of these quiet areas. We present spectro-polarimetric observations of very quiet regions for different values of the heliocentric angle for the Fe I lines at 1.56 micron, from disc centre to positions close to the limb. The spatial resolution of the data is 0.7-1". We analyze direct observable properties of the Stokes profiles as the amplitude of circular and linear polarization as well as the total degree of polarization. Also the area and amplitude asymmetries are studied. We do not find any significant variation of the properties of the polarimetric signals with the heliocentric angle. This means that the magnetism of the solar internetwork remains the same regardless of the position on the solar disc. This observational fact discards the possibility of modeling the internetwork as a Network-like scenario. The magnetic elements of internetwork areas seem to be isotropically distributed when observed at our spatial resolution.
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