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Observational Patterns of Lithium Depletion in Pre-Main Sequence Stars*

Published online by Cambridge University Press:  12 April 2016

Eduardo L. Martin ,
Rafael Rebolo ,
Ramon J. Garcia Lopez ,
Antonio Magazzu  and
Yakov V. Pavlenko
Eduardo L. Martin
Affiliation:
Instituto de Astrofísica de Canarias, E-38200, La Laguna, Spain
Rafael Rebolo
Affiliation:
Instituto de Astrofísica de Canarias, E-38200, La Laguna, Spain
Ramon J. Garcia Lopez
Affiliation:
Instituto de Astrofísica de Canarias, E-38200, La Laguna, Spain
Antonio Magazzu
Affiliation:
Osservatorio Astrofisico di Catania, I-95125 Catania, Italy
Yakov V. Pavlenko
Affiliation:
The Principal Observatory of Ukraine, Kiev, Ukraine

Abstract

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We present results based on the analysis of lithium abundances in a sample of ~ 50 pre-main sequence stars covering a wide range of masses (from 2 to 0.3 M⊙) and luminosities (corresponding to ages of 1-100 Myr). Stars with masses estimated to be ≳ 1 M⊙show lithium abundances close to cosmic with little scatter (± 0.3 dex). Stars with masses less than Solar present a wide range of lithium abundances, with a clear trend to lower abundances for lower luminosities (greater age). The observed Li abundances constrain theoretical predictions of lithium depletion in rotating pre-main sequence stars.

Type
II. Atmospheres, a window to the interior
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 165 - 167
Copyright
Copyright © Astronomical Society of the Pacific 1993

Footnotes

*

Based on observations made with the 4.2 m William Herschel Telescope and the 2.5 m Isaac Newton Telescope, operated on the island of La Palma by the Royal Greenwich Observatory in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias.

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