Speaker
Nadezhda Zolotova
(St. Petersburg State University)
Description
Parisian solar observations constitute the richest sunspot data set covering the Maunder minimum. Thirty years ago, sunspot latitudes were reconstructed by Elisabeth Nesme-Ribes, but these data have been lost. We present an extensive set of newly reconstructed sunspot parameters for both sunspot groups and individual sunspots. Based on the hand-written notes in the observational journals by Philippe de La Hire we carefully evaluated areas (both umbra and penumbra), latitudes, longitudes, as well as other parameters. We also estimated the differential rotation, and the fraction of sunspot groups obeying or violating Joy's law.
Primary author
Nadezhda Zolotova
(St. Petersburg State University)
Co-author
Mikhail Vokhmyanin
(University of Oulu)
