THE GLOBULAR-CLUSTER NGC-6652

Citation
S. Ortolani et al., THE GLOBULAR-CLUSTER NGC-6652, Astronomy and astrophysics, 286(2), 1994, pp. 444-448
Citations number
19
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00046361
Volume
286
Issue
2
Year of publication
1994
Pages
444 - 448
Database
ISI
SICI code
0004-6361(1994)286:2<444:TGN>2.0.ZU;2-G
Abstract
We have carried out BVRI and Gunn z CCD photometry for the globular cl uster NGC6652 which had no previous colour magnitude study. This clust er, which is projected close to the bulge minor axis at almost-equal-t o 11 from the center, has a CMD morphology suggesting a moderately hig h metallicity of [Fe/H] almost-equal-to -0.9. The Horizontal Branch is red with the possibility of a few members in the RR Lyrae gap. The cl uster appears to have several blue stragglers. We derive a reddening o f E(B-V) = 0. 10 +/- 0.02 and a distance of d. = 9.3 Kpc. The turnoff is reached and we obtain DELTAV(TO-HB) = 3.35 +/- 0.16 suggesting that it is slightly younger than the average age of Galactic globular clus ters.