期刊
ASTRONOMY & ASTROPHYSICS
卷 379, 期 1, 页码 136-146出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20011314
关键词
stars : evolution; stars : general; stars : Hertzsprung-Russel (HR) and C-M diagrams; open clusters and associations : NGC 3114 : individual; open clusters and associations : Collinder 228 : individual; open clusters and associations : vdB-Hagen 99 : individual
In this paper we present and analyze CCD UBVRI photometry in the region of the three young open clusters NGC 3114, Collinder 228, and vdB-Hagen 99, located in the Carina spiral feature. NGC 3114 lies in the outskirts of the Carina nebula. We found 7 star members in a severely contaminated field, and obtain a distance of 950 pc and an age less than 3 x 10(8) yrs. Collinder 228 is a younger cluster (8 x 10(6) yrs), located in front of the Carina nebula complex, for which we identify 11 new members and suggest that 30% of the stars are probably binaries. As for vdB-Hagen 99, we add 4 new members, confirming that it is a nearby cluster located at 500 pc from the Sun and projected toward the direction of the Carina spiral arm.
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