The analysis of Fe XIV 5303 coronal emission-line polarization measurements

Details The analysis of Fe XIV 5303 coronal emission-line polarization measurements The analysis of Fe XIV 5303 coronal emission-line polarization measurements

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...116..248a&link_type=abstract

Astronomy and Astrophysics, vol. 116, no. 2, Dec. 1982, p. 248-254.

Astronomy and Astrophysics

Astrophysics

6

Coronagraphs, Iron, Line Spectra, Polarimetry, Solar Corona, Solar Spectra, Abundance, Emission Spectra, Polarization Characteristics

Scientific paper

Polarization measurements obtained in September 1978 in the green coronal line with the Pic-du-Midi coronameter are discussed. As the K-corona polarization was simultaneously measured values of mean and local electron density are inferred as minimum values of ion abundance. Those abundances are insensitive to the unknown density irregularities along the line of sight. The minimum value of iron abundance deduced is 7 x 10 to the -5th: it appears to be larger than recent photospheric abundances. The interest of simultaneous measurements in the 10747 A line of Fe XIII is emphasized. The problem of infering the magnetic field direction is discussed.

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