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New extra-solar planets: the metallicity distribution revisited

Published online by Cambridge University Press:  26 May 2016

Nuno C. Santos ,
Garik Israelian  and
Michel Mayor
Nuno C. Santos
Affiliation:
Observatoire de Genève, CH1290 Sauverny, Switzerland
Garik Israelian
Affiliation:
Instituto de Astrofisica de Canarias, 38200 La Laguna, Tenerife, Spain
Michel Mayor
Affiliation:
Observatoire de Genève, CH1290 Sauverny, Switzerland

Abstract

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We present the spectroscopy results of a new set of planetary host stars discovered in the context of the Geneva extra-solar planet search programme. The analysis was based on high S/N spectra obtained with the CORALIE spectrograph at the 1.2-m Euler Swiss Telescope (at La Silla, ESO). We revisit the metallicity distribution of stars with planets. The present sample, largely enriched by the inclusion of the most recent discoveries, strongly suggests that stars with planets are anomalously metal rich, but that the source of the metallicity excess is most probably “primordial”.

Type
Part I: Discovery and study of extrasolar planets - current
Information
Symposium - International Astronomical Union , Volume 202: Planetary Systems in the Universe – Observation, Formation and Evolution , 2004 , pp. 118 - 120
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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