Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-11
Mon.Not.Roy.Astron.Soc.368:1078-1086,2006
Astronomy and Astrophysics
Astrophysics
11 pages, 16 degraded eps figures, in press in MNRAS
Scientific paper
10.1111/j.1365-2966.2006.10187.x
CCD BVI photometry is presented for 7 previously unstudied star clusters projected toward the inner side of the Galaxy: Trumpler 23, Lynga 3, Collinder 307, Ruprecht 134, ESO552SC16, AL 5 and Kronberger 3. Color magnitude diagrams of the cluster regions allow us to conclude that Lynga 3 and ESO552SC16, are not clusters, but groups of bright stars probably located in the Carina-Sagittarius spiral arm. AL 5 and Kronberger 3 are so embedded in a dense stellar field that we cannot confirm their nature. Trumpler~ 3 and Ruprecht 134 are two intermediate-age open clusters located well inside the solar ring which deserve further attention. Finally, Collinder 307 is an obscured younger cluster (250 Myr) located in the Carina-Sagittarius spiral arm. Our results emphasize the difficulty to search for open clusters in the inner regions of the Galaxy due to the richness of the field and the patchy nature of the interstellar absorption, but at the same time significantly contribute to a better understanding of this complicated regions of the Milky Way.
Carraro Giovanni
Costa Edgardo
Janes Kenneth A.
Mendez Rene A.
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