Cepheus OB3 association: faint members.

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Open Clusters And Associations: Individual: Cepheus Ob3, Stars: Early Type, Fundamental Parameters, Ages

Scientific paper

From UBVRI-CCD photometry in the region of Cepheus OB3 association previously published by the authors, a search for faint members was performed. Colour-colour and colour-magnitude calibrations were used to estimate individual reddenings and distances. The comparison between these individual values and the average values for the known member stars led to a list of member candidates. Candidate members brighter than V=14 mag were observed in the uvby-β system to confirm or deny their membership. Members down to V=13.6 mag were found. The ages of the association subgroups were found to be 5.5 and 7.5 Myr.

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