Helium-like sulphur emission lines in solar active regions and their sub-C class variability

Details Helium-like sulphur emission lines in solar active regions and their sub-C class variability Helium-like sulphur emission lines in solar active regions and their sub-C class variability

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44l.141w&link_type=abstract

PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 5, p. L141-L145.

Astronomy and Astrophysics

Astronomy

10

Emission Spectra, Solar Activity, Solar Spectra, Solar Spectrometers, Spaceborne Astronomy, Helium, Japanese Spacecraft, Line Spectra, Sulfur

Scientific paper

Helium-like sulphur spectra (formation temperature, Tm about 18 x 10 exp 6 K) from coronal active regions are being obtained by the Bragg Crystal Spectrometer onboard the Yohkoh mission. The average electron temperatures of the quiescent active regions deduced from the full-disk integrated sulphur spectra are 3.5-4 x 10 exp 6 K. The temporal behavior of the emission lines in the sub-C level events shows that hot plasmas (T greater than 10 exp 7 K) can be produced in these weak events.

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