The potential of Meudon spectroheliograph for investigating long term solar activity and variability - Archive ouverte HAL Access content directly
Journal Articles Advances in Space Research Year : 2022

The potential of Meudon spectroheliograph for investigating long term solar activity and variability

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Jean-Marie Malherbe
Daniel Crussaire
  • Function : Author
  • PersonId : 1192833
Florence Cornu
  • Function : Author
  • PersonId : 1192834

Abstract

Observations of the chromosphere with Deslandres's spectroheliograph started at Paris Observatory in 1893 and were followed by systematic observations at Meudon since 1908. The solar collection of Ha and CaII K images is probably the longest available worldwide, with associated products such as synoptic maps and tables. Since 2018, Meudon spectroheliograph is the only instrument producing data-cubes of full line profiles of CaII H, CaII K and Ha, for each pixel of the solar disk. Slices of the cubes provide monochromatic images. We summarize in this paper the capabilities of the successive generations of the instrument, and explore the potential of the collection and products for analysis of rare events, investigations of past solar activity and studies of long term variability.
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Dates and versions

hal-03868950 , version 1 (02-12-2022)

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Jean-Marie Malherbe, Isabelle Bualé, Daniel Crussaire, Florence Cornu, Thierry Corbard. The potential of Meudon spectroheliograph for investigating long term solar activity and variability. Advances in Space Research, 2022, ⟨10.1016/j.asr.2022.07.058⟩. ⟨hal-03868950v1⟩
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