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Temporal fluctuations in the differential rotation of cool active stars
J. -F. Donati, A. Collier Cameron, P. Petit
This paper reports positive detections of surface differential rotation on two rapidly rotating cool stars at several epochs, by using stellar surface features (both cool spots and…
Polar Fields for AB Dor
T. McIvor, M. Jardine, A. Collier Cameron +2
Polar spots are often observed on rapidly-rotating cool stars, but the nature of the magnetic field in these spots is as yet unknown. While Zeeman-Doppler imaging can provide surfa…
Doppler Images of the RS CVn Binary HR 1099 (V711 Tau) from the MUSICOS 1998 Campaign
D. Garcia-Alvarez, J. R. Barnes, A. Collier Cameron +4
We present Doppler Images of the RS CVn binary system HR 1099 (V711 Tau) from spectra taken in two different sites, KPNO and MSO, during the MUSICO S 1998 campaign. Contemporaneous…
Searching for Planetary Transits in the Field of Open Cluster NGC 6819 - I
R. A. Street, Keith Horne, T. A. Lister +7
We present results from our survey for planetary transits in the field of the intermediate age (~2.5 Gyr), metal-rich ([Fe/H]~+0.07) open cluster NGC 6819. We have obtained high-pr…