Free access article

Issue A&A Volume 395, Number 2, November IV 2002 Page(s) 515 - 518 Section Stellar clusters and associations DOI 10.1051/0004-6361:20021375

A&A 395, 515-518 (2002)
DOI: 10.1051/0004-6361:20021375

Research Note

On the lithium content of the globular cluster M 92

P. Bonifacio

Istituto Nazionale di Astrofisica - Osservatorio Astronomico di Trieste, Via G. B. Tiepolo 11, 34131 Trieste, Italy

(Received 14 May 2002 / Accepted 9 September 2002)

Abstract
I use literature data and a new temperature calibration to determine the Li abundances in the globular cluster M 92. Based on the same data, Boesgaard et al. have claimed that there is a dispersion in Li abundances in excess of observational errors. This result has been brought as evidence for Li depletion in metal-poor dwarfs. In the present note I argue that there is no strong evidence for intrinsic dispersion in Li abundances, although a dispersion as large as 0.18 dex is possible. The mean Li abundance, A(Li) = 2.36, is in good agreement with recent results for field stars and TO stars in the metal-poor globular cluster NGC 6397. The simplest interpretation is that this constant value represents the primordial Li abundance.

Key words: diffusion -- stars: abundances -- stars: atmospheres -- stars: population II -- Galaxy: globular clusters: individual: M 92 -- cosmology: observations

SIMBAD Objects

© ESO 2002

What is OpenURL?