HR: 1330h
AN: SH42B-0506    [PDF]
TI: Some Considerations about Inferring Coronal Magnetic Fields and Other Coronal Properties from Coronal Emission Line Polarization
AU: * Arnaud, J
EM: arnaud@ast.obs-mip.fr
AF: Laboratoire d'astrophysique, Observatoire Midi-Py\'en\'ees, 14 Avenue Edouard Belin, Toulouse, 31400 France
AU: Habbal, S R
EM: sdh@aber.ac.uk
AF: University Of Wales at Aberystwyth, Institute of Mathematical and Physical Sciences, Aberystwyth, SY23 3BZ United Kingdom
AU: Habbal, S R
EM: sdh@aber.ac.uk
AF: Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA MA 02138 United States
AU: Arndt, M
EM: MArndt@brigew.edu
AF: Bridgewater State College, Department of Physics, Bridgewater, MA MA 02325 United States
AU: Woo, R
EM: richard.woo@jpl.nasa.gov
AF: Jet Propulsion Laboratory, 4800 Oak Grove Drive, MS 238-725, Pasadena, CA CA 91109 United States
AB: Ground based studies of Coronal Emission Lines (CEL) linear polarization had been carried out for the 530.3 nm FeXIV line at Pic du Midi and for the 1074.7 nm Fe XIII line at Sac Peak in the 1977-1980 period. The large scale organization of the polarization has clearly revealed the existence of a large scale structure of the coronal magnetic field. More recently, the first successful eclipse CEL polarimetric measurements were made in the 1074.7 nm line during the total solar eclipse of 21 June 2001, confirming earlier results of the predominance of a radial direction of the coronal magnetic field. A first measurement of the circular polarization in the 1074.7 nm line has also recently been performed. Circular polarization gives access to the strength of the LOS magnetic field while the linear polarization maps the transverse magnetic field direction. We will use ground based and eclipse 1074.7 nm line polarimetric data to provide examples of the properties (e.g., magnetic field, abundances, inhomogeneities) such observations can help to infer in this 3-D and optically thin medium.
DE: 7509 Corona
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting