RS CVn stars - Chromospheric phenomenaThe observational information regarding chromospheric emission features in surface-active RS CVn stars is reviewed. Three optical features are considered in detail: Ca II H and K, Balmer H-alpha and He I 10830 A. While the qualitative behavior of these lines is in accord with solar-analogy/rotation-activity ideas, the quantitative variation and scaling are very poorly understood. In many cases, the spectroscopic observations with sufficient SNR and resolution to decide these questions have simply not yet been made. The FK Com stars, in particular, present extreme examples of rotation that may well tax present understanding of surface activity to its limits.
Document ID
19830066294
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bopp, B. W. (Toledo, University Toledo, OH, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1983
Subject Category
Astrophysics
Meeting Information
Meeting: Activity in red-dwarf stars; Seventy-first Colloquium