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Astron. Astrophys. 322, 511-522 (1997)

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1. Introduction

This is the fourth paper in a series of Doppler imaging of active late-type stars. Our pilot paper focused on the single, rapidly rotating FK Comae star HD 199178 (Strassmeier et al. 1996b), Paper I on the RS CVn binary UZ Librae (Strassmeier 1996a), Paper II on the weak-lined T Tauri star V410 Tauri (Rice & Strassmeier 1996) and Paper III dealt with the late spectral-type RS CVn binary IN Virginis (Strassmeier 1997). One of the goals of this series is, first, to generate a representative sample of stars with Doppler images and, second, to search for evidence for or against a correlation between stellar rotation rate and the appearance of polar spots as well as differential rotation as a possible correlate for the preferred appearance of spots. This in turn may allow us to quantitatively constrain the "boundary conditions" for the functioning of a stellar dynamo at very different stellar rotation rates and evolutionary stages.

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© European Southern Observatory (ESO) 1997

Online publication: June 5, 1998

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