Probable Detection of a Bright Infrared Coronal Emission Line of Si IX near 3.93 Microns

Details Probable Detection of a Bright Infrared Coronal Emission Line of Si IX near 3.93 Microns Probable Detection of a Bright Infrared Coronal Emission Line of Si IX near 3.93 Microns

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...521..478k&link_type=abstract

The Astrophysical Journal, Volume 521, Issue 1, pp. 478-482.

Astronomy and Astrophysics

Astronomy

14

Sun: Corona, Sun: Infrared, Sun: Magnetic Fields

Scientific paper

We report here the probable detection of an emission line of Si IX that was observed from an open C130 aircraft over the Pacific Ocean during the 1998 total solar eclipse. Although the IR data themselves are inconclusive because of the uncertainty in the precise central wavelengths of the narrowband filters during the eclipse, the consistency of the measured IR limb excess with simultaneous EUV emission measured by SOHO/Coronal Diagnostic Spectrometer and the EUV Imager Telescope support our detection claim. This line appears to be the brightest IR coronal line yet observed, and its existence may significantly improve future prospects for obtaining optical coronal magnetic field measurements.

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