Identification of Moving Groups and Member Selection using Hipparcos Data

Details Identification of Moving Groups and Member Selection using Hipparcos Data Identification of Moving Groups and Member Selection using Hipparcos Data

1999-03-16

arxiv.org/abs/astro-ph/9903240v1

Astronomy and Astrophysics

Astrophysics

14 pages, 9 encapsulated postscript figures, LaTeX using mn.sty; accepted for publication in the MNRAS

Scientific paper

10.1046/j.1365-8711.1999.02644.x

A new method to identify coherent structures in velocity space --- moving groups --- in astrometric catalogues is presented: the Spaghetti method. It relies on positions, parallaxes, and proper motions and is ideally suited to search for moving groups in the Hipparcos Catalogue. No radial velocity information is required. The method has been tested extensively on synthetic data, and applied to the Hipparcos measurements for the Hyades and IC2602 open clusters. The resulting lists of members agree very well with those of Perryman et al. for the Hyades and of Whiteoak and Braes for IC2602.

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