Small clusters or multiple stars?

Details Small clusters or multiple stars? Small clusters or multiple stars?

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987iraj...18...95l&link_type=abstract

(Astronomical Science Group of Ireland, Meeting, Trinity College, Dublin, Apr. 6, 1987) Irish Astronomical Journal (ISSN 0021-10

Astronomy and Astrophysics

Astronomy

4

Binary Stars, Galactic Clusters, Milky Way Galaxy, Stellar Evolution, Open Clusters

Scientific paper

The true nature of 'coincidence objects', closely spaced groups of two or more identical spectra identified during the visual inspection of objective-prism plates with widened spectra, is explored on the basis of a statistical analysis of observational data. Four probable explanations are considered: (1) relatively widely separated binary systems in the open field, (2) 'optical' double stars formed by two members of a cluster, (3) very poor 'microclusters', and (4) cluster remnants. It is found that the present observational data base does not permit physically meaningful distinctions between open clusters and multiple star systems.

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