Dust and Young Stars in Puppis

Physics

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Scientific paper

Two decades aga the presence of a group of young stars in the constellation Puppis was noted and described by Westerlund (Mon. Not. R. Astr. Soc. 127,71,1963). This group appears to form an association of hot and luminous o and B stars also containing the long-period cepheid RS Puppis. The association was named Puppis OB 3. In the region occupied by the association a number of small and peculiar bright nebulae were noted as weil as several dark globules and dust lanes (Fig. 1). Also present in the region is the H 11 region RCW 19 which obviously is excited by the most luminous of the association members. The age of the association was estimated from the most luminous member, the 07f star HO 69464, to be no more than 4 . 106 years. Thus the stage seemed to be set for the scrutinizing of a relatively restricted region of recent star formation concerning the content of both stellar and interstellar material. The following is only intended to be a progress report of this project as some of the recent observational material is still being analysed.

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