Abstract

A search for faint OB stars over an area of 43 sq. deg in the Puppis region resulted in the discovery of 397 OB stars and 5 early type supergiants; the blue magnitude range of the survey is about 12.0 < B < 15.0 mag. About 73% of the stars found had not been previously recognized as OB stars; about 12% of them show hydrogen line emission. UBV photoelectric and photographic measures of OB stars from this list and from the Luminous Stars Survey are presented. The galactic distribution of the OB stars in the region shows concentrations around the open clusters Ruprecht 44 and Ruprecht 55, and the presence of an important grouping of young stars located far below the plane

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