Eggen's Moving Groups: Fact or Fiction?

Details Eggen's Moving Groups: Fact or Fiction? Eggen's Moving Groups: Fact or Fiction?

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997esasp.402..525s&link_type=abstract

Proceedings of the ESA Symposium `Hipparcos - Venice '97', 13-16 May, Venice, Italy, ESA SP-402 (July 1997), p. 525-530

Computer Science

12

Scientific paper

The concept of moving groups is discussed, using the Hipparcos parallaxes and proper motions to compute precise space velocities for about 800 stars included in this project. The V component of the space velocity (in the direction of galactic rotation) has been used as the main membership criterion. Moving group parallaxes have been found to be close to the Hipparcos values. An additional test involving galactic orbit modelling has been undertaken for some of the moving groups, allowing us to monitor the development of a star cluster. It has been possible to simulate the stellar tube formation and to examine various combinations of velocity components in order to find better membership criteria.

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