On connecting the dynamics of the chromosphere and transition region with Hinode SOT and EIS
Viggo H. Hansteen, Bart De Pontieu, Mats Carlsson, Scott McIntosh, Tetsuya Watanabe, Harry Warren, Louise Harra, Hirohisa Hara, Theodore D. Tarbell, Dick Shine,… 展开作者
Viggo H. Hansteen, Bart De Pontieu, Mats Carlsson, Scott McIntosh, Tetsuya Watanabe, Harry Warren, Louise Harra, Hirohisa Hara, Theodore D. Tarbell, Dick Shine, Alan Title, Carolus J. Schrijver, Saku Tsuneta, Yukio Katsukawa, Kiyoshi Ichimoto, Yoshinori Suematsu, Toshifumi Shimizu
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8 pages, 7 figures, accepted by PASJ special Hinode "first light" issue
We use coordinated Hinode SOT/EIS observations that include high-resolution magnetograms, chromospheric and TR imaging and TR/coronal spectra in a first test to study how the dynamics of the TR are driven by the highly dynamic photospheric magnetic fields and the ubiquitous chromospheric waves. Initial analysis shows that these connections are quite subtle and require a combination of techniques including magnetic field extrapolations, frequency-filtered time-series and comparisons with synthetic chromospheric and TR images from advanced 3D numerical simulations. As a first result, we find signatures of magnetic flux emergence as well as 3 and 5 mHz wave power above regions of enhanced photospheric magnetic field in both chromospheric, transition region and coronal emission.
Preprocessing of Hinode/SOT vector magnetograms for nonlinear force-free coronal magnetic field modelling
太阳磁场是了解太阳大气物理过程的关键。非线性无力代码已被证明在从基础矢量边界数据外推日冕场方面是有用的[概述见Schrijver等人,2006]。然而,我们只能在光球层中常规地高精度测量磁场矢量,例如,Hinode/SOT,不幸的是,这些数据不满足Aly(1989)定义的无力一致性条件。因此,我们必须对这些数据进行一些变换,然后才能合理地应用非线性无力外推代码。为此,我们已经开发了一个最小化的过程,使用测量的光球场矢量作为输入,以近似一个更色球一样的字段,该方法被称为预处理。详情见Wiegelmann et al. 2006]。该程序包括力自由的一致性积分和空间平滑。该方法已经过模型活动区的深入测试[见Metcalf等人,2008年],并已应用于几个地面矢量磁图数据之前。在这里,我们应用预处理程序的光球磁场测量与Hinode/SOT仪器。
Flows and Non-thermal Velocities in Solar Active Regions Observed with the Extreme-ultraviolet Imaging Spectrometer on Hinode: A Tracer of Active Region Sources of Heliospheric Magnetic Fields?
Properties of high-degree oscillation modes of the Sun observed with Hinode/SOT
目标。利用日出太阳光学望远镜,我们研究了在太阳大气层中两个层次上观测到的高度太阳振荡的基本性质,即G波段(在光球层中形成)和Ca II H线(色球层发射)。方法.我们通过计算单个功率谱以及交叉谱特性来分析数据,即,相干性和相移。的观测特性进行了比较与一个简单的理论模型,其中包括相关噪声的影响。结果结果显示显着的频率变化之间的Ca II H和G-波段光谱,特别是以上的声学截止频率的伪模式。互谱相位显示出与声振荡(p模式)线相关联的峰值,并且开始随着声截止附近的频率而增加。然而,我们发现(表面重力波)f-模式没有相移。在一个简单的模型与相关的背景下,如果在Ca II H数据中的相关噪声水平高于G-波段数据中的P-模式的观察到的属性是定性再现。这些结果表明,太阳振荡的多波长观测与传统的强度-速度观测相结合,可能有助于确定相关背景噪声的水平,并确定太阳上波激发源的类型。
Giant Chromospheric Anemone Jet Observed with Hinode and Comparison with Magnetohydrodynamic Simulations: Evidence of Propagating Alfven Waves and Magnetic Reconnection
Three dimensional structure of penumbral filaments from Hinode observations
我们分析了NOAA AR 10953半影在高空间分辨率(0.3”)下的分光偏振观测。用太阳光学望远镜(SOT)获得了Fe Ⅰ谱线在630.1nm和630.2nm处的全斯托克斯轮廓。利用SIR码对数据进行了反演,得到了温度、视向速度和光学深度上的磁场矢量分量的分层。为了评估气体压力并获得适当的几何高度尺度,考虑到洛伦兹力的项,对每个像素的运动方程进行了积分。为了建立边界条件,遗传算法已被应用。最终产生的磁场在其不确定性内具有与0相容的发散。首先分析了威尔逊低压与速度、温度、磁场强度和磁场倾角的相关性,有力地支持了Solanki和Montavon(1993)提出的未梳理半影模型。