Chromospheric variations with solar cycle phase using imaging and spectroscopic studies

Spectroscopic observations of Sun in Ca-K line profile were made as a function of latitude and integrated over the visible 180° longitude at the Kodaikanal observatory since 1985. The spectroheliograms of the Sun in Ca-K line have also been obtained at the observatory since 1907. We have derived Ca-...

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Veröffentlicht in:	Monthly notices of the Royal Astronomical Society 2015-04, Vol.448 (3), p.2798-2809
Hauptverfasser:	Sindhuja, G., Singh, Jagdev, Priyal, Muthu
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Belts Latitude Longitude Noise Polar regions Solar cycle Solar cycles Spectroscopic analysis Spectroscopy Spectrum analysis Sun
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