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Spectroscopic Variability in Late-Type Dwarfs Using High S:N Spectra

Published online by Cambridge University Press:  19 July 2016

B. H. Foing ,
J. E. Beckman  and
G. Vladilo
B. H. Foing
Affiliation:
LPSP/IAS Verrieres, France.
J. E. Beckman
Affiliation:
Instituto de Astrofisica de Canarias, Tenerife, Spain.
G. Vladilo
Affiliation:
Osservatorio Astronomico di Trieste, Trieste, Italy.

Abstract

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Monitoring of active late-type dwarfs, spectroscopically with high resolution (λ/Δλ ∼ 105) and high S:N (>300) round their activity cycles, principally in the Call H resonance line, offers techniques to explore (a) plage filling factors (b) 3-dimensional chromospheric velocity fields (c) maps of surface activity via “Doppler Imaging”. In this paper we deal with the use of spectral signatures to derive plage cover.

Type
IV. Spectroscopic Patterns of Stellar Atmospheres
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 287 - 289
Copyright
Copyright © Kluwer 1988 

References

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