Astrophysics and Space Science

, Volume 199, Issue 1, pp 77–87 | Cite as

Multicolour photoelectric photometry of the open cluster NGC 752

  • U. Dzérvítis
  • O. Paupers
Article

Abstract

In the open cluster NGC 752, 89 stars are observed in the Vilnius seven-colour photometric system, including probable members fainter than observed hitherto. Spectral classification of observed stars are made and individual reddening values are determined. The mean reddening of the cluster stars is equivalentE(B - V) = 0 . m 025. By fitting on colour index-magnitude diagrams the cluster Main Sequence with the Hyades one the distance modulus (m - M)0 = 8 . m 15 ± 0 . m 15 is found. For 11 red giant members of the cluster absolute magnitudes are derived and compared with ones of the standard calibration. It is obtained that the cluster giants are in mean 0 . m 6 fainter than giants of corresponding spectral class in the solar vicinity.

Keywords

Colour Standard Calibration Absolute Magnitude Open Cluster Main Sequence 

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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • U. Dzérvítis
    • 1
  • O. Paupers
    • 1
  1. 1.Radioastrophysical ObservatoryLatvian Academy of SciencesRigaLatvia

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