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Photometric investigation of the association Car OB 2

Published online by Cambridge University Press:  14 August 2015

W. Seggewiss
W. Seggewiss*
Affiliation:
Observatorium Hoher List der Universitäts-Sternwarte Bonn, Germany

Abstract

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A photometric investigation of the association Car OB 2 was carried out with a photoelectric standard sequence observed with the ESO photometric telescope and plates taken with the ADH telescope of Boyden Observatory. The distance of Car OB 2 is 2.04 kpc, the color excess EB–V is 0m.38. The main sequence of this ‘OB’ association reaches at least to late A-type stars. The luminosity function was determined and compared with the luminosity functions of very young open clusters observed by Walker (1957). The distance of a group of 13 early-type stars in the area of Car OB 2 (‘group c’) was found to be 2.5 kpc, the reddening 0m.68. The relation of Car OB 2 and group c to the structure of the Carina arm is regarded.

Type
Part II/Observations of Spiral Structure in Our Galaxy
Information
Symposium - International Astronomical Union , Volume 38: The Spiral Structure of our Galaxy , 1970 , pp. 265 - 269
Copyright
Copyright © Reidel 1970 

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