Astronomisches Rechen-Institut Heidelberg

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ARI-Heidelberg Mitteilungen Serie A, No. 105

Author(s): Lohmann, W.
Title: Der offene Sternhaufen NGC 6067
Source: Astrophys. Space Sci. 47, 447-455
Year: 1977
Abstract: The open star cluster NGC 6067 was investigated by the strip method on charts of photographs with different exposure times taken with the 1-m Schmidt telescope of the European Southern Observatory. Because of the large distance (1820 pc) of the cluster its luminosity function is known up to date only between Mv=-4.5 and Mv=+1.5. In this paper it is continued to Mv=4.4 and further extrapolated by means of 2 variants. The cluster contains 419 respectively 476 stars with total masses of 1453 resp. 1483 Msolar. On account of its radius of 5.9 pc the cluster is a rather extended object, which can be described by the generalized density law of Schuster with n=4.42 and the central star density 8.9 stars pc-3. The mean velocity of the stars amounts to 1.03 km s-1, the mass-brightness relation is 0.031 in solar units.
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