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Oxygen and sulphur abundances of solar-type stars of the solar-neighborhood

Published online by Cambridge University Press:  23 December 2005

G. F. Porto de Mello
Affiliation:
Observatório do Valongo/UFRJ, Ladeira do Pedro Antônio 43, 20080-090 Rio de Janeiro, RJ, Brazil (email: gustavo@ov.ufrj.br)
F. Requeijo
Affiliation:
Observatório Nacional/MCT, Brazil
L. da Silva
Affiliation:
Observatório Nacional/MCT, Brazil
M. Kürster
Affiliation:
Heidelberg University, Germany
S. Els
Affiliation:
CTIO/Chile
M. Endl
Affiliation:
McDonald Observatory, USA
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Abstract

The Sun has typical abundances of both oxygen and sulphur for its metallicity, age and galactic orbit, when compared to the nearby solar-type stars. This result favors a solution of the old riddle of the solar overabundance in oxygen with respect to the local interstellar medium as caused by the recent infall of metal-poor gas over the disk, rather than the competing explanations of an outward migration of the Sun from a inner, and metal richer, birthplace in the disk, or a last-minute supernova which might have enriched the proto-solar nebula.

Type
Contributed Papers
Copyright
© 2005 International Astronomical Union

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