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Chromospheric activity in red giants, and related phenomena

Published online by Cambridge University Press:  14 August 2015

Armin J. Deutsch
Armin J. Deutsch*
Affiliation:
Mount Wilson and Palomar Observatories, Carnegie Institution of Washington, California Institute of Technology

Abstract

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Normal red giants of a given spectral type are shown to be heterogeneous with respect to the following chromospheric features: the Balmer absorption lines, the emission line at H∊, and the double-reversed emission lines at Caii H and K. These chromospheric lines are also shown to be strongly time variable, in at least some red giants, on a time scale of a few months or years. Other chromospheric features that require study lie in the infrared (Hei 10830), the near ultraviolet (Feii emission lines), and the vacuum ultraviolet.

Type
Part II: Stellar Line Spectra
Information
Symposium - International Astronomical Union , Volume 36: Ultraviolet Stellar Spectra and Related Ground-Based Observations , 1970 , pp. 199 - 208
Copyright
Copyright © Reidel 1970 

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