Lithium abundance/surface activity connections in solar-type Pleiades

Clarke, D., MacDonald, E.C. and Owens, S. (2004) Lithium abundance/surface activity connections in solar-type Pleiades. Astronomy and Astrophysics, 415(2), pp. 677-684. (doi: 10.1051/0004-6361:20034620)



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The relation between the lithium abundance, <i>A<sub>Li</sub></i>, and photospheric activity of solar-type Pleiads is investigated for the first time via acquisition and analysis of B and V-band data. Predictions of activity levels of target stars were made according to the <i>A<sub>Li</sub></i>/(B - V) relation and then compared with new CCD photometric measurements. Six sources behaved according to the predictions while one star (HII 676), with low predicted activity, exhibited the largest variability of the study; another star (HII 3197), with high predicted activity, was surprisingly quiet. Two stars displayed non-periodic fadings, this being symptomatic of orbiting disk-like structures with irregular density distributions. Although the observation windows were not ideal for rotational period detection, some periodograms provided possible values; the light-curve obtained for HII 1532 is consistent with that previously recorded.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Clarke, Dr David
Authors: Clarke, D., MacDonald, E.C., and Owens, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Astronomy and Astrophysics
Publisher:EDP Sciences
ISSN (Online):1432-0746
Copyright Holders:Copyright © 2004 EDP Sciences
First Published:First published in Astronomy and Astrophysics 415(2):677-684
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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