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The Existence of Moving Groups and the Disk Heating Problem
Published online by Cambridge University Press: 25 May 2016
Abstract
A powerful moving group-finding algorithm has been developed and applied to a large sample of B, A and F main sequence stars from the Hipparcos Input Catalogue. Four moving groups near the Sun (Pleiades, Sirius, IC2391 and Hyades) have been identified without assuming any a priori knowledge of the properties of moving groups. This is the most convincing objective evidence for their existence. After the members of the moving groups are removed from the sample, we investigate the disk heating problem. The results show that the velocity dispersion of the local disk stars increases with age, roughly as ≃ ∞ τ1/5.
- Type
- Chapter 6: How are we to Understand the Large Scale Structure of the ISM?
- Information
- Symposium - International Astronomical Union , Volume 169: Unsolved Problems of the Milky Way , 1996 , pp. 513 - 514
- Copyright
- Copyright © Kluwer 1996