THE LOW GALACTIC LATITUDE METAL-RICH GLOBULAR-CLUSTER NGC-6440

Citation
S. Ortolani et al., THE LOW GALACTIC LATITUDE METAL-RICH GLOBULAR-CLUSTER NGC-6440, Astronomy & Astrophysics. Supplement series, 108(3), 1994, pp. 653-659
Citations number
19
Categorie Soggetti
Astronomy & Astrophysics
ISSN journal
03650138
Volume
108
Issue
3
Year of publication
1994
Pages
653 - 659
Database
ISI
SICI code
0365-0138(1994)108:3<653:TLGLMG>2.0.ZU;2-O
Abstract
NGC 6440 is another case of bulge high metallicity globular cluster wi th particular colour magnitude diagram properties, like those of NGC 6 553, NGC 6528 and Terzan 1. We present V and I observations of NGC 644 0, and find a reddening of E(B - V) approximate to 1.00 +/- 0.1, and a distance of d(.) approximate to 8.47 kpc. The colour magnitude diagra m morphology shows characteristics very similar to those of NGC 6553 a nd NGC 6528, in particular the horizontal branch clump almost superimp osed on the giant branch, and a curved upper giant branch, showing tha t NGC 6440 also has a metallicity close to solar. The observations are available in electronic form at the CDS (ftp 130.79.128.5).