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

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.