Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aj....126..265p&link_type=abstract
The Astronomical Journal, Volume 126, Issue 1, pp. 265-275.
Astronomy and Astrophysics
Astronomy
10
Galaxy: Fundamental Parameters, Galaxy: Structure, Galaxy: Open Clusters And Associations: General
Scientific paper
Faint-magnitude CCD photometry has been obtained for the clusters ESO 093-SC08 and van den Bergh-Hagen 176. These data reveal ESO 093-SC08 to be an old open cluster, with a derived age of 5.5+/-1.0 Gyr, a heliocentric distance of 14.00+/-0.75 kpc, an inferred metallicity in the range -0.60<=[Fe/H]<=-0.20 dex, and Galactocentric positions RGC=13.0+/-0.7 kpc and Z=-1000+/-50 pc. For van den Bergh-Hagen 176, a derived age of 7.0+/-1.5 Gyr, a heliocentric distance of 18.00+/-1.00 kpc, an inferred metallicity in the range -0.20<=[Fe/H]<=0.20 dex, and Galactocentric positions RGC=12.0+/-0.9 kpc and Z=+1350+/-100 pc are found. The current results for ESO 093-SC08 are in good agreement with a study by Bica et al. Van den Bergh-Hagen 176 appears to be a massive metal-rich old cluster, similar to NGC 6791, or a young, metal-rich globular cluster.
Phelps Randy Lee
Schick Matthew
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