The potential of Ca II K observations for solar activity and variability studies
Date Issued
2018
Author(s)
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 20th 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.
Coverage
Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles
Volume
vol. 13, S340
Start page
115
Conferenece
Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles
Conferenece place
Jaipur, India
Conferenece date
19- 23 February, 2018
Issn Identifier
1743-9213
Ads BibCode
2018IAUS..340..115E
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
1805.04483-4.pdf
Description
preprint
Size
234.08 KB
Format
Adobe PDF
Checksum (MD5)
ebbaa48e90e042b38e5927ed6bcb1ee8
Loading...
Name
Proc IAU 2018 340.pdf
Description
PDF editoriale
Size
196.37 KB
Format
Adobe PDF
Checksum (MD5)
27e1695f492a7ca4f3b0efadcff34ebc