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Vector magnetic fields in sunspots. I - Stokes profile analysis using the Marshall Space Flight Center magnetographThe 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.
Document ID
19920032007
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Balasubramaniam, K. S. (NASA Marshall Space Flight Center Huntsville, AL, United States)
West, E. A. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 382
ISSN: 0004-637X
Subject Category
SOLAR PHYSICS
Distribution Limits
Public
Copyright
Other