[HTML][HTML] Full-disc Ca ii K observations—A window to past solar magnetism
Full-disc observations of the Sun in the Ca ii K line provide one of the longest collections of
solar data. First such observations were made in 1892 and since then various sites around …
solar data. First such observations were made in 1892 and since then various sites around …
How does the solar chromospheric activity look like under different inclination angles?
G Vanden Broeck, S Bechet, G Rauw… - Astronomy and …, 2024 - orbi.uliege.be
Chromospheric plages are distributed between mid-latitude and the Equator and never
close to the Poles. Therefore, we suspect that the inclination angle of the solar rotation axis …
close to the Poles. Therefore, we suspect that the inclination angle of the solar rotation axis …
Temporal and Latitudinal Variations in Ca-K Plage and Network Area: An Implication for Meridional Flows
M Priyal, J Singh, B Ravindra… - The Astrophysical …, 2023 - iopscience.iop.org
The Ca-K spectroheliograms obtained at the Kodaikanal observatory are used to generate a
uniform time series using the equal-contrast technique for studying the long-and short-term …
uniform time series using the equal-contrast technique for studying the long-and short-term …
How does the solar chromospheric activity look like under different inclination angles?
GV Broeck, S Bechet, G Rauw, F Clette - arxiv preprint arxiv:2410.11335, 2024 - arxiv.org
Chromospheric plages are distributed between mid-latitude and the Equator and never
close to the Poles. Therefore, we suspect that the inclination angle of the solar rotation axis …
close to the Poles. Therefore, we suspect that the inclination angle of the solar rotation axis …
The quiet chromosphere: Phase relation with the solar cycle
KJ Li, W Feng - Advances in Space Research, 2022 - Elsevier
The solar chromosphere was daily observed in the Ca II K line from 1915 August 10 to 1985
July 7, and correspondingly, 938 synoptic maps are measured. The valuable database is …
July 7, and correspondingly, 938 synoptic maps are measured. The valuable database is …
Variation of small scale magnetic fields over a century using Ca-K images as proxy
A combined uniform and long-time series of Ca-K images from the Kodaikanal Observatory,
Mount Wilson Observatory and Mauna Loa Solar Observatory was used to identify and study …
Mount Wilson Observatory and Mauna Loa Solar Observatory was used to identify and study …
Chinese sunspot drawings and their digitization – (V) the phase relation between Hα flare index and sunspot activity
YY Li, S Zheng, SG Zeng, TH Zhou, GH Lin - Journal of Astrophysics and …, 2022 - Springer
H α flare index is one of the solar activity indicators to describe the physical properties of the
active regions in the solar atmosphere. Sunspot number is a representative indicator of the …
active regions in the solar atmosphere. Sunspot number is a representative indicator of the …
[PDF][PDF] Chinese sunspot drawings and their digitization–(V) the phase relation between Ha flare index and sunspot activity
YY LI, S ZHENG, SHUG ZENG, THUI ZHOU… - Journal of Astrophysics …, 2023 - ias.ac.in
Ha flare index is one of the solar activity indicators to describe the physical properties of the
active regions in the solar atmosphere. Sunspot number is a representative indicator of the …
active regions in the solar atmosphere. Sunspot number is a representative indicator of the …