139 citations · 986 across the 53 of their papers we have counts for
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The Mount Wilson Observatory S-index of the Sun
Ricky Egeland, Willie Soon, Sallie Baliunas +3
The most commonly used index of stellar magnetic activity is the instrumental flux scale of singly-ionized calcium H & K line core emission, S, developed by the Mount Wilson Observ…
Space weather research and forecast in USA
Alexei A. Pevtsov
In the United States, scientific research in space weather is funded by several Government Agencies including the National Science Foundation (NSF) and the National Aeronautics and…
Dynamo Sensitivity in Solar Analogs with 50 Years of Ca II H & K Activity
Ricky Egeland, Willie Soon, Sallie Baliunas +3
The Sun has a steady 11-year cycle in magnetic activity most well-known by the rising and falling in the occurrence of dark sunspots on the solar disk in visible bandpasses. The 11…
Long-term variations in sunspot magnetic field - area relation
Yury A. Nagovitsyn, Alexei A. Pevtsov, Aleksandra A. Osipova
Using observations of sunspot magnetic field strengths (H) from the Crimean Astrophysical Observatory (CrAO) and area (S) of sunspots from the Kislovodsk Mountain Astronomical Stat…
Correlation Between Sunspot Number and ca II K Emission Index
Luca Bertello, Alexei A. Pevtsov, Andrey Tlatov +1
Long-term synoptic observations in the resonance line of Ca II K constitute a fundamental database for a variety of retrospective analyses of the state of the solar magnetism. Syno…
HMI Synoptic Maps Produced by NSO/NISP
Anna L. H. Hughes, Luca Bertello, Andrew R. Marble +3
Recently, the National Solar Observatory (NSO) Solar-atmosphere Pipeline Working Group has undertaken the production of synoptic maps from Helioseismic and Magnetic Imager (HMI) ma…