The Carina Spiral Feature — an investigation based on a complete magnitude-limited uvbyβ sample

Abstract

This contribution reflects a detailed overall survey of the Carina Spiral Feature based on uvbyβ photometry of O- and B-type stars. New observations are combined with all data currently available, to collate a complete homogeneous magnitude-limited uvbyβ database. A uniform procedure is applied to obtain the photometry-derived stellar parameters. A homogeneous distance scale is established to the most prominent young structures in the field and the distribution of the visual extinction is analyzed.