OB Stars in the Solar Neighborhood I: Analysis of their Spatial Distribution

Details OB Stars in the Solar Neighborhood I: Analysis of their Spatial Distribution OB Stars in the Solar Neighborhood I: Analysis of their Spatial Distribution

2006-02-22

arxiv.org/abs/astro-ph/0602484v1

Astron.J.131:2700-2709,2006

Astronomy and Astrophysics

Astrophysics

28 pages including 9 Postscript figures, one of them in color. Accepted for publication in The Astronomical Journal, 30 Januar

Scientific paper

10.1086/503110

We present a newly-developed, three-dimensional spatial classification method, designed to analyze the spatial distribution of early type stars within the 1 kpc sphere around the Sun. We propose a distribution model formed by two intersecting disks -the Gould Belt (GB) and the Local Galactic Disk (LGD)- defined by their fundamental geometric parameters. Then, using a sample of about 550 stars of spectral types earlier than B6 and luminosity classes between III and V, with precise photometric distances of less than 1 kpc, we estimate for some spectral groups the parameters of our model, as well as single membership probabilities of GB and LGD stars, thus drawing a picture of the spatial distribution of young stars in the vicinity of the Sun.

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