Ca II K spectroheliograms for studies of long-term changes in solar irradiance

Theodosios Chatzistergos; Ilaria Ermolli; Natalie A. Krivova; Sami K. Solanki

doi:10.1017/S1743921318001825

Ca II K spectroheliograms for studies of long-term changes in solar irradiance

Solar and Stellar Astrophysics 2019-01-30 v1

Authors: Theodosios Chatzistergos , Ilaria Ermolli , Natalie A. Krivova , Sami K. Solanki

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Abstract

We address the importance of historical full disc Ca II K spectroheliograms for solar activity and irradiance reconstruction studies. We review our work on processing such data to enable them to be used in irradiance reconstructions. We also present our preliminary estimates of the plage areas from five of the longest available historical Ca II K archives.

Keywords

Ca II K spectroheliograms solar activity solar irradiance reconstruction plage areas historical archives

Cite

@article{arxiv.1805.03928,
  title  = {Ca II K spectroheliograms for studies of long-term changes in solar irradiance},
  author = {Theodosios Chatzistergos and Ilaria Ermolli and Natalie A. Krivova and Sami K. Solanki},
  journal= {arXiv preprint arXiv:1805.03928},
  year   = {2019}
}

Comments

5 pages, 3 figures

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