Journal Article

Parent stars of extrasolar planets – X. Lithium abundances and <i>v</i> sin <i>i</i> revisited

G. Gonzalez, M. K. Carlson and R. W. Tobin

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 403, issue 3, pages 1368-1380
Published in print April 2010 | ISSN: 0035-8711
Published online April 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2009.16195.x
Parent stars of extrasolar planets – X. Lithium abundances and v sin i revisited

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We determine Li abundances and v sin i values from new spectra of 53 stars with Doppler-detected planets not included in our previous papers in this series. We also examine two sets of stars without detected planets, which together serve as our comparison sample. Using the method of comparison of Li abundances and v sin i values between two sets of stars we introduced in Gonzalez, we confirm that these two quantities are smaller among stars with planets (SWPs) compared to stars without detected planets near the solar temperature. The transition from low to high Li abundance among SWPs occurs near 5850 K, a revision of about 50 K from our previous determination. The transition from low to high v sin i occurs near 6000 K, but this temperature is not as well constrained.

Keywords: stars: abundances; planetary systems

Journal Article.  5357 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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