A photometric study of the open cluster Haffner 6

Astronomy and Astrophysics – Astronomy

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Hertzsprung-Russel (Hr) Diagram-Stars, Luminosity Function, Mass Function-Open Clusters And Associations, Individual, Haffner 6.

Scientific paper

We have obtained CCD BV photometry of 665 stars in the region of the southern open cluster Haffner 6. The photometry of a nearby field is also reported. This poorly studied object is shown to be of intermediate age and to have a solar metallicity. Adopting a metal content Z=0.020, we found a colour excess E(B-V)=0.43, an apparent distance modulus (m-M)=13.90 and an age of about 1.0 Gyr. Consequently, we obtain a distance of about 3.4 kpc from the Sun. The main-sequence (MS) integrated luminosity function (ILF) is compatible with the standard Salpeter (chi=1.35) initial mass function (IMF).

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