Lithium abundance/surface activity connections in solar-type Pleiads

Abstract

The relation between the lithium abundance, A_Li, 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 A_Li/(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.

8 Pages, 9 Figures, accepted in A&A

References in corpus (3)

• New rotation periods in the Pleiades: Interpreting activity indicators
• The Lithium-Rotation Correlation in the Pleiades Revisited
• On the lithium abundance dispersion in late-type Pleiades stars

Cited by in corpus (5)

• Deep MMT Transit Survey of the Open Cluster M37 III: Stellar Rotation at 550 Myr
• Lithium-7 surface abundance in pre-MS stars. Testing theory against clusters and binary systems
• Lithium abundance and rotation of seismic solar analogues - Solar and stellar connection from Kepler and Hermes observations
• New BVIc Photometry of Low-mass Pleiades Stars: Exploring the Effects of Rotation on Broadband Colors
• Theoretical predictions of surface light element abundances in protostellar and pre-Main Sequence phase