Solar chromospheric activity (HeI 10830A) (Shcherbakov+, 1996)

Details Solar chromospheric activity (HeI 10830A) (Shcherbakov+, 1996) Solar chromospheric activity (HeI 10830A) (Shcherbakov+, 1996)

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ycat..33090655s&link_type=abstract

VizieR On-line Data Catalog: J/A+A/309/655. Originally published in: 1996A&A...309..655S

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Sun

Scientific paper

Full disk spectroscopic observations in the near infrared region of the solar spectrum (the Sun-as-a-star) are presented for the years 1981-1993. The central depth of the He I λ10830A line shows changes following the 11-year activity cycle, and also variability following the rotation of the Sun. We found high correlations between the depth of the He I line and coronal indices of activity, such as Fe XIV λ5303 coronal emission index and 10.7cm radio flux. Thus the He I line depth may be used as an index of activity for the chromospheric and low chromospheric-coronal transition region for the Sun, observed as a star and, by inference for other late-type stars. (1 data file).

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