NONLINEAR FORCE-FREE FIELD MODELING OF A SOLAR ACTIVE REGION USING SDO/HMI AND SOLIS/VSM DATA

NONLINEAR FORCE-FREE FIELD MODELING OF A SOLAR ACTIVE REGION USING SDO/HMI AND SOLIS/VSM DATA
复制标题

使用 SDO/HMI 和 SOLIS/VSM 数据对太阳能活动区域进行非线性无力场建模

DOI:
10.1088/0004-6256/144/2/33
复制
发表时间:
2012
期刊:
The Astronomical Journal
影响因子:
--
通讯作者:
Wiegelmann
Wiegelmann
中科院分区:
--
文献类型:
--
作者:
Thalmann;Pietarila;Wiegelmann

文献摘要

参考文献

被引文献

相似文献

我们使用SDO/HMI和SOLIS/VSM光球磁场测量来模拟太阳活跃区上方无力的日冕场,假设磁力占主导地位。我们考虑了由噪声和特殊的反演技术引起的测量不确定性。在为特定数据集寻找最佳建模参数后,我们比较了得到的非线性无力模型场。我们通过比较相对自由能含量、磁压垂直分布和垂直积分电流密度来证明不同数据来源的日冕场重建结果的一致性。虽然VSM和HMI测量的纵向和横向磁通量明显不同,但我们发现在模拟场中有相当大的相似性。这表明我们用于计算非线性无力场的算法对于作为输入的光球矢量图的差异和不足具有鲁棒性。我们还描述了总的无力、无功和自由磁能的绝对值有多大差异,以及基于hmi和基于vsm的模型体积的纵向和横向分量的方向如何相互比较。
We use SDO/HMI and SOLIS/VSM photospheric magnetic field measurements to model the force-free coronal field above a solar active region, assuming magnetic forces dominate. We take measurement uncertainties caused by, eg, noise and the particular inversion technique, into account. After searching for the optimum modeling parameters for the particular data sets, we compare the resulting nonlinear force-free model fields. We show the degree of agreement of the coronal field reconstructions from the different data sources by comparing the relative free energy content, the vertical distribution of the magnetic pressure, and the vertically integrated current density. Though the longitudinal and transverse magnetic flux measured by the VSM and HMI is clearly different, we find considerable similarities in the modeled fields. This indicates the robustness of the algorithm we use to calculate the nonlinear force-free fields against differences and deficiencies of the photospheric vector maps used as an input. We also depict how much the absolute values of the total force-free, virial, and the free magnetic energy differ and how the orientation of the longitudinal and transverse components of the HMI-and VSM-based model volumes compare to each other.
DOI: 10.1007/s11207-008-9130-y
发表时间: 2008-01
期刊: Solar Physics
影响因子: 2.8
作者:
T. Wiegelmann;J. Thalmann;C. Schrijver;M. DeRosa;T. Metcalf
通讯作者: T. Wiegelmann;J. Thalmann;C. Schrijver;M. DeRosa;T. Metcalf
DOI: 10.1051/0004-6361/200912812
发表时间: 2009
影响因子: 6.5
作者:
T. Wiegelmann;L. Y. Chaouche;S. Solanki;A. Lagg
通讯作者: A. Lagg
DOI: 10.1086/155495
发表时间: 1977
期刊: The Astrophysical Journal
影响因子: --
作者:
L. Auer;J. Heasley;L. House
通讯作者: L. House
DOI: 10.1086/587058
发表时间: 2008-03-20
影响因子: 7.9
作者:
Jing, Ju;Wiegelmann, Thomas;Wang, Haimin
通讯作者: Wang, Haimin
基于 SDO/HMI 观测的主要喷发活跃区磁场和能量的演化
DOI: 10.1088/0004-637x/748/2/77
发表时间: 2012
期刊: The Astrophysical Journal
影响因子: --
作者:
Hoeksema;Wiegelmann;T.Hayashi;Thalmann
通讯作者: Thalmann