Journal Article

Lithium abundances in the α Per cluster

Suchitra C. Balachandran, Sushma V. Mallik and David L. Lambert

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 410, issue 4, pages 2526-2539
Published in print February 2011 | ISSN: 0035-8711
Published online January 2011 | e-ISSN: 1365-2966 | DOI:
Lithium abundances in the α Per cluster

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Lithium (Li) abundances are presented and discussed for 70 members of the 50-Myr-old open cluster α Per. More than half of the abundances are from new high-resolution spectra. The Li abundance in the F-type stars is equal to its presumed initial abundance, confirming previous suggestions that pre-main-sequence depletion is ineffective for these stars. Intrinsic star-to-star scatter in Li abundance among these stars is comparable to the measurement uncertainties. There is marginal evidence that the stars of high projected rotational velocity (v sin i) follow a different abundance versus temperature trend from the slow rotators. For stars cooler than about 5500 K, the Li abundance declines steeply with decreasing temperature and there develops a star-to-star scatter in the Li abundance. This scatter is shown to resemble the well-documented scatter seen in the 70-Myr-old Pleiades cluster. The scatter appears to be far less pronounced in the 30-Myr clusters, which have been studied for Li abundance.

Keywords: stars: abundances; open clusters and associations: individual: α Per

Journal Article.  10886 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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