Journal
ASTRONOMY & ASTROPHYSICS
Volume 405, Issue 3, Pages 991-998Publisher
E D P SCIENCES
DOI: 10.1051/0004-6361:20030700
Keywords
open clusters and associations : general
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We report the detection of three new open cluster candidates located in Cygnus. Two of them are projected near the center of the rich compact association CygOB2. These two objects have been found during an optical inspection of that region with Digitized Sky Survey images. Using 2MASS photometry we determined their fundamental parameters. We assumed an age of 1 - 4 Myr and obtained a distance from the Sun d(..) = 1.8 +/- 0.2 kpc for both objects. Reddening values for Objects 1 and 2 are E(B-V) = 2.12 +/- 0.06 and E(B- V) = 1.82 +/- 0.06, respectively. A normal luminosity function is observed down to A0 stars, similar to that of NGC6910. The two open cluster candidates may form a physical pair in CygOB2, similar to Tr 14 / Tr 16 in CarOB1. Subsequently, we carried out a systematic search with 2MASS in a region 3degrees x 3degrees encompassing CygOB2. A third uncatalogued object resulted from this search which is projected just outside CygOB2.
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