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A discussion of NGC 4755 and some other young clusters in the Galaxy and the Magellanic Clouds

Published online by Cambridge University Press:  14 August 2015

M. W. Feast
M. W. Feast*
Affiliation:
Radcliffe Observatory

Extract

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A study of the cluster NGC 4755 (κ Crucis) was begun as a result of the several interesting problems raised by an earlier study of NGC 3293 (Feast 1958). Determinations of radial velocity and spectral type have been made in NGC 4755 from 102 spectra of 35 stars. Full details are published elsewhere (Feast 1963). These results were combined with the three-colour photometry of Arp and van Sant (1958). The cluster has a nearly-vertical evolved main sequence at spectral type B1. The spectral types and B, V measures for giants and dwarfs yield a mean reddening of +0m48 and a distance of 2 · 36 kpc. These values are considerably greater than those deduced by Arp and van Sant but they have been confirmed from an analysis of the three-colour measurements alone.

Type
Section 1: The Galaxy
Information
Symposium - International Astronomical Union , Volume 20: The Galaxy and the Magellanic Clouds , 1964 , pp. 22 - 23
Copyright
Copyright © Australian Academy of Science 1964 

References

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