3 papers
astro-ph1997
Improved Methods for Identifying Moving Groups
J. H. J. de Bruijne, R. Hoogerwerf, A. G. A. Brown +2
We present a new procedure for the identification of moving groups. It is a combination of two independent member selection methods. One is a modern implementation of a classical c…
astro-ph1997
Structure and Evolution of Nearby OB Associations
P. T. de Zeeuw, A. G. A. Brown, J. H. J. de Bruijne +4
We present the first results of a comprehensive census of the stellar content of the nearby OB associations based on Hipparcos positions, proper motions and parallaxes for 12842 ca…
astro-ph1997
New Results for Three Nearby OB Associations
R. Hoogerwerf, J. H. J. de Bruijne, A. G. A. Brown +3
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 motion…