139 citations · 795 across the 39 of their papers we have counts for
4 papers · 2 filters
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…
Short-Term Variations in the Equatorial Rotation Rate of Sunspot Groups
J. Javaraiah, L. Bertello
We have detected several periodicities in the solar equatorial rotation rate of sunspot groups in the Greenwich Photoheliographic Results (GPR) during the period 1931-1976, the Sol…
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…
The reversal of the Sun's magnetic field in cycle 24
Alexander V. Mordvinov, Alexei A. Pevtsov, Luca Bertello +1
Analysis of synoptic data from the Vector Stokes Magnetograph (VSM) of the Synoptic Optical Long-term Investigations of the Sun (SOLIS) and the NASA/NSO Spectromagnetograph (SPM) a…