Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003csss...12.1008w&link_type=abstract
The Future of Cool-Star Astrophysics: 12th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (2001 July 30 - August
Astronomy and Astrophysics
Astrophysics
1
Ei Eridani, Hd 26337
Scientific paper
We present first results on spectroscopic observations of the rapidly-rotating active binary star EI Eridani obtained during the MUSICOS multi-site campaign in 1998. Eight sites around the globe were involved in order to achieve surface images within a few rotations as EI Eridani's critical rotation period of 1.945 days makes it impossible to obtain time-resolved images from a single site. The data were split into groups in order to obtain consecutive, independent Doppler images. The preliminary results confirm the existence of a stable polar spot that changes in size and shape while low-latitute spots are found to be short lived. For the first time, it is possible to achieve consecutive, time-resolved Doppler images for EI Eridani. A preliminary investigation of differential rotation contradicts the results from Hatzes & Vogt (1992).
Foing Bernard
MUSICOS98 Team
Strassmeier Klaus G.
Washuettl Albert
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