Query : 1999A&AS..136..363B

1999A&AS..136..363B - Astron. Astrophys., Suppl. Ser., 136, 363-372 (1999/April-2)

The nature of the star clusters ESO 93-SC08 and ESO 452-SC11.


Abstract (from CDS):

We present V and I colour-magnitude diagrams of the star clusters ESO 93-SC08 and ESO 452-SC11. Both clusters are poorly populated, and the colour-magnitude diagrams show that ESO 93-SC08 is an intermediate age open cluster, while ESO 452-SC11 is confirmed as a globular cluster. The magnitude difference between the turnoff and the clump/horizontal branch indicates an age of 4-5Gyr for ESO 93-SC08, while ESO 452-SC11 has an age comparable to the average of the halo globular clusters. ESO 93-SC08 has a reddening of E(B-V)=0.64 and is located at d≃13.7kpc from the Sun. It is a distant open cluster in the outer disk. ESO 452-SC11 appears to be a southern counterpart of the Palomar clusters. We derive a reddening of E(B-V)=0.58, a distance d≃6.5kpc and a metallicity [Fe/H]≃-1.5 for ESO 452-SC08. The deep CMD shows evidence of depletion at the lower main sequence, similarly to other poorly populated globular clusters.

Abstract Copyright:

Journal keyword(s): globular clusters: individual: ESO 452-SC11 - open clusters: individual: ESO 93-SC08 - HR diagram

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 ESO 93-8 GlC 11 19 41.9 -65 13 11           ~ 23 0
2 ESO 452-11 GlC 16 39 25.50 -28 23 52.0           ~ 62 0

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