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Doppler Imaging of Starspots

Published online by Cambridge University Press:  12 April 2016

Steven S. Vogt  and
G. Donald Penrod
Steven S. Vogt
Affiliation:
Lick Observatory, Board of Studies in Astronomy and Astrophysics, University of California Santa Cruz
G. Donald Penrod
Affiliation:
Lick Observatory, Board of Studies in Astronomy and Astrophysics, University of California Santa Cruz

Abstract

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We discuss a newly-developed technique for spatially resolving starspots on some of the more rapidly rotating RS CVn stars. Basically, the method uses high resolution, very high signal-to-noise spectral line profiles and exploits the Doppler velocity correspondence between position across the stellar disk and wavelength position across a rotationally broadened line profile to synthesize an image of the star, showing the location, sizes, and shapes of its starspots. Though still in a developmental stage, the technique is already yielding information about the structure and general appearance of starspots. Examples of Doppler Imaging observations of HR 1099 will be presented, along with a movie showing the behavior of synthetic line profiles generated from a computer spot model.

Type
Session III: Observed Activity in Related Objects
Information
International Astronomical Union Colloquium , Volume 71: Activity in Red-Dwarf Stars , 1983 , pp. 379 - 385
Copyright
Copyright © Reidel 1983

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