Open AccessIdentification of moving groups and member selection using Hipparcos data *
Author(s) -
Hoogerwerf Ronnie,
Aguilar Luis A.
Publication year - 1999
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1999.02644.x
Subject(s) - physics , identification (biology) , space (punctuation) , stars , astrometry , radial velocity , selection (genetic algorithm) , astrophysics , open cluster , astronomy , artificial intelligence , computer science , botany , biology , operating system
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 searching 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 IC 2602 open clusters. The resulting lists of members agree very well with those of Perryman et al. for the Hyades and those of Whiteoak & Braes for IC 2602.