An imaging observation of the solar corona in the green line with a Fabry-Perot interferometer on a coronagraph

Details An imaging observation of the solar corona in the green line with a Fabry-Perot interferometer on a coronagraph An imaging observation of the solar corona in the green line with a Fabry-Perot interferometer on a coronagraph

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasj...47..383i&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 47, no. 3, p. 383-387

Astronomy and Astrophysics

Astronomy

2

Iron, Line Spectra, Solar Corona, X Ray Imagery, Astronomical Interferometry, Coronagraphs, Doppler Effect, Fabry-Perot Interferometers, Image Analysis, Velocity Distribution

Scientific paper

By using a scanning Fabry-Perot interferometer on a coronagraph, an imaging observation of the solar corona in the emission line (Fe XIV 5303 A) was carried out. Subtraction of the scattered light was performed by changing the central wavelength of the transmission of the etalon, and thus a two-dimensional distribution of the emission line intensity was obtained with both high accuracy and high time resolution. The observed active region (NOAA 7576) was fairly stationary, showing no distinct active phenomena; the green line image showed more or less a similar distribution with the soft X-ray images obtained by the Yohkoh satellite. The observed characteristics can be attributed to the absence of a hot (3-5 MK) coronal component in this active region. The superiority of Fabry-Perot interferometry for imaging observations in the corona emission lines is also discussed.

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