AAS 200th meeting, Albuquerque, NM, June 2002
Session 56. Solar Instrumentation
Display, Wednesday, June 5, 2002, 10:00am-7:00pm, SW Exhibit Hall

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[56.11] Inference of Solar Vector Magnetic Fields with Filtergraph Instruments

J. D. Graham, B. W. Lites, A. López Ariste, A. Norton, H. Socas-Navarro, S. Tomczyk (High Altitude Observatory)

We investigate the diagnostic potential of polarimetric measurements with filtergraph instruments. Numerical simulations are used to explore the possibility of inferring the magnetic field vector, its filling factor, and the thermodynamics of model atmospheres when only a few wavelength measurements are available. The simulations assume the magnetic sun to be represented by Milne-Eddington (ME) atmospheres. The results indicate that two wavelength measurements are insufficient to reliably determine the magnetic parameters, regardless of whether magnetograph techniques or least-squares fitting inversions are used. However, as few as four measurements analyzed with the inversion technique provide enough information to retrieve the intrinsic magnetic field with an accuracy better than 10 generated by more general models and ASP data passed through a simulated filtergraph.

The author(s) of this abstract have provided an email address for comments about the abstract: jgraham@ucar.edu

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Bulletin of the American Astronomical Society, 34
© 2002. The American Astronomical Soceity.