Seminar talk by Eberhard Wiehr
Title: The velocity excess of ions over neutrals in solar prominences by Eberhard Wiehr (Institut für Astrophysik, Göttingen, Germany) Abstract: Time varying Doppler shifts of NaD and SrII in a quiescent prominence are coherent in phase but show 15% larger amplitude of the ions. This is equally found for HeI 5015 and FeII 5018 and …
Seminar talk by Frédéric Clette
Title: The sunspot cycle, from past to future ————————————————— Presenter: Frédéric Clette, Observatoire Royal de Belgique, WDC – SILSO, Brussels Abstract: After a short review of the recent re-calibration work accomplished on the long-term series of the sunspot number and sunspot group number, I will present the current effort to recover all original raw data …
Seminar talk
Presenter: Ondřej Procházka Title: Type II White-light Solar Flares Instrumentation and Data Analysis
Seminar talk by E.Wiehr
Title: Velocity and Line-Width Excess of Emission Lines from Ions over Neutrals