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Solar Physics

, Volume 25, Issue 2, pp 357–379 | Cite as

Physical properties of solar chromospheric plages

I. Line profiles of the CaII H, K, and infrared triplet lines
  • Richard A. Shine
  • Jeffrey L. Linsky
Article

Abstract

Double pass photoelectric observations are presented of five Caii lines (H, K, 8498 Å, 8542 Å, and 8662 Å) in a number of solar plages of different degrees of activity, quiet regions, and a sunspot. The data are compared with previous work. All five lines show increasing emission together in plages and the least opaque of the infrared triplet lines appears to exhibit core emission prior to the more opaque members of the multiplet. The question of source function equality is considered and the differences and similarities among plage profiles and between plage and quiet profiles are shown qualitatively and quantitatively.

Keywords

Source Function Function Equality Double Pass Quiet Region Photoelectric Observation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Company 1972

Authors and Affiliations

  • Richard A. Shine
    • 1
  • Jeffrey L. Linsky
    • 1
  1. 1.Joint Institute for Laboratory Astrophysics, University of ColoradoBoulderU.S.A.

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