New Results for Three Nearby OB Associations

Details New Results for Three Nearby OB Associations New Results for Three Nearby OB Associations

1997-07-08

arxiv.org/abs/astro-ph/9707088v1

Astronomy and Astrophysics

Astrophysics

4 pages, 7 Postscript figures, LaTeX using venice97.sty, twocolumn.sty; to appear in Proceedings of the Hipparcos Venice '97

Scientific paper

We have developed a new procedure to identify moving groups, and have applied it to carry out a census of the nearby OB associations based on Hipparcos parallaxes and proper motions (see de Bruijne et al. and de Zeeuw et al. elsewhere in this volume). Here we present three illustrative cases. For $\alpha$ Persei our method allows us to refine the bright end of the membership list, while for Collinder 121 the Hipparcos data change the whole appearance of the association. Finally, we report the discovery of a new association in the field of Cepheus OB2.

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