Astrophysics and Space Science

, Volume 127, Issue 2, pp 327–343 | Cite as

A photometric study of three star fields in the southern region of M33

  • P. Z. Kunchev
  • N. S. Nikolov
Article

Abstract

The 2 m RCC telescope of the Rozhen National Observatory (Bulgaria) was used to obtain the colour-magnitude and colour-colour diagrams of OB110 and OB112 associations which form the largest star grouping in the southern region of M33. The stars withV andU≲20.4 andB≲21 were measured. TheV magnitude, the coloursB - V, U - B and the respective identification charts are given. This allowed to construct the luminosity function of OB110+OB112. The group has an integrated magnitudeMVT=−11.8 which is by 0 m .5 fainter than OB78 (M31). The mean absorption and the foreground were examined as well.

Keywords

Southern Region Luminosity Function Identification Chart National Observatory OB112 Association 

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Copyright information

© D. Reidel Publishing Company 1986

Authors and Affiliations

  • P. Z. Kunchev
    • 1
  • N. S. Nikolov
    • 1
  1. 1.Department of AstronomyUniversity of SofiaBulgaria

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