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Astron. Astrophys. 327, 121-124 (1997)

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Research Note

Metallicity of the young halo globular cluster Ruprecht 106 *

P. François 1, 2, J. Danziger 2, 3, R. Buonanno 4 and M.N. Perrin 1

1 Observatoire de Paris, DASGAL, URA 335 du CNRS, 61 Av. de l'Observatoire, F-75014 Paris, France
2 ESO Karl Schwarzschild Straße 2, D-85748 Garching bei München, Germany
3 Osservatorio Astronomico di Trieste, Via Tiepolo 11, I-34131 Trieste, Italy
4 Osservatorio Astronomico di Roma, Via del Parco Mellini 84, I-00136 Rome, Italy

Received 23 January 1997 / Accepted 9 May 1997


Medium resolution spectra of 3 stars have been used to determine the metallicity of the globular cluster Ruprecht 106. On the basis of a code developed by Cayrel et al. (1991), we computed a grid of synthetic spectra in order to derive the metallicity of these stars. We found an abundance of [FORMULA] which, although not formally at variance with the estimate of metallicity based on the slope of the RGB ( [FORMULA] ) raises some puzzling questions concerning the true metallicity of this cluster.

Key words: globular clusters - Ruprecht 106 - stars: abundances

* Based on observations collected at ESO, La Silla

SIMBAD Objects


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© European Southern Observatory (ESO) 1997

Online publication: April 8, 1998