Physics
Scientific paper
Jan 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001stin...0227999j&link_type=abstract
Technical Report, PB2002-102493; NCAR/TN-466-STR
Physics
Solar Corona, Solar Magnetic Field, Field Strength, Linear Polarization, Emission Spectra, Resonance Scattering, Dynamics, Heating, Electromagnetic Fields, Solar Flares, Magnetic Dipoles
Scientific paper
Measurements of components of the vector magnetic field in the solar corona can potentially yield information critical to our understanding of coronal structure, dynamics and heating. In this report we re-examine various techniques for such measurements, in particular those that can be applied outside of active regions, to investigate issues critical to the development of a new 'coronal magnetometer,' and to lay down some foundations upon which a suitable instrument may be developed for synoptic observations. The well-known forbidden coronal emission lines of magnetic dipole (M1) character appear to have the highest potential to address outstanding problems in coronal physics, especially those related to the storage and release of magnetic free energy. Measurements of the full Stokes vector of M1 lines can constrain both the line-of-sight (LOS) field strength, through the longitudinal Zeeman effect seen in Stokes V profiles, and the direction of the vector field projected onto the plane-of-the-sky (POS), through the analysis of resonance scattering-induced linear polarization seen in Stokes Q and U, in the so-called 'strong field' regime of the Hanl effect.
Casini Roberto
Edwards David P.
Francis E.
Judge Philip G.
Tomczyk Steve
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