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|Title:||The potential of Ca II K observations for solar activity and variability studies||Authors:||ERMOLLI, Ilaria
Krivova, Natalie A.
Solanki, Sami K.
|Issue Date:||2018||Volume:||Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles||Series:||PROCEEDINGS OF THE INTERNATIONAL ASTRONOMICAL UNION||Number:||vol. 13, S340||First Page:||115||Abstract:||Several observatories around the globe started regular full-disc imaging of the solar atmosphere in the Ca II K line in the early decades of the 20<SUP>th</SUP> century. These observations are continued today at a few sites with either old spectroheliographs or modern telescopes equipped with narrow-band filters. The Ca II K time series are unique in representing long-term variations of the Sun's chromospheric magnetic field. However, meaningful results from their analysis require accurate processing of the available data and robust merging of the information stored in different archives. This paper provides an overview of the historical and modern full-disc Ca II K observations, with focus on their quality and the main results obtained from their analysis over the last decade.||Conference Name:||Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles||Conference Place:||Jaipur, India||Conference Date:||19- 23 February, 2018||URI:||http://hdl.handle.net/20.500.12386/34224||URL:||https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/article/potential-of-ca-ii-k-observations-for-solar-activity-and-variability-studies/66A7C3F4801AB6E00AB9D56A78CA7005
|Appears in Collections:||3.01 Contributi in Atti di convegno|
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