Vector magnetic fields in sunspots. I - Stokes profile analysis using the Marshall Space Flight Center magnetograph
Vector magnetic fields in sunspots. I - Stokes profile analysis using the Marshall Space Flight Center magnetograph
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DOI：
10.1086/170757
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发表时间：
1991-12
期刊：
影响因子：
--
通讯作者：
K. Balasubramaniam;E. West
中科院分区：
文献类型：
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作者：
K. Balasubramaniam;E. West
马歇尔航天飞行中心（MSFC）的矢量磁力仪是一种带通为125 mA的可调谐滤波磁力仪。本文用非线性最小二乘拟合方法，对以黑子为中心的MSFC矢量磁象仪观测到的Stokes偏振剖面进行反演，得到了Fe I 5250.2 A谱线形成区的矢量磁场参数和热力学参数。作为一个初步的调查，它也表明，恢复的热力学参数可以更好地理解，如果拟合参数，如多普勒宽度，不透明度比，阻尼常数被分解成更基本的量，如温度，微湍流速度，或密度参数。
The Marshall Space Flight Center (MSFC) vector magnetograph is a tunable filter magnetograph with a bandpass of 125 mA. Results are presented of the inversion of Stokes polarization profiles observed with the MSFC vector magnetograph centered on a sunspot to recover the vector magnetic field parameters and thermodynamic parameters of the spectral line forming region using the Fe I 5250.2 A spectral line using a nonlinear least-squares fitting technique. As a preliminary investigation, it is also shown that the recovered thermodynamic parameters could be better understood if the fitted parameters like Doppler width, opacity ratio, and damping constant were broken down into more basic quantities like temperature, microturbulent velocity, or density parameter.