NTT VI PHOTOMETRY OF THE METAL-RICH AND OBSCURED BULGE GLOBULAR-CLUSTER TERZAN-5

Authors
ORTOLANI S BARBUY B BICA E
Citation
S. Ortolani et al., NTT VI PHOTOMETRY OF THE METAL-RICH AND OBSCURED BULGE GLOBULAR-CLUSTER TERZAN-5, Astronomy and astrophysics, 308(3), 1996, pp. 733-737
Citations number
25
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics → ACNP
ISSN journal
00046361
Volume
308
Issue
3
Year of publication
1996
Pages
733 - 737
Database
ISI
SICI code
0004-6361(1996)308:3<733:NVPOTM>2.0.ZU;2-N
Abstract
We study the metal-rich bulge globular cluster Terzan 5 by means of VI colour-magnitude diagrams, with images obtained under exceptional see ing conditions (0.34 ''-0.50 ''). Differential reddening is important across the cluster. We derive a reddening of E(B - V) = 2.49 and a dis tance from the Sun d. = 5.6 kpc, closer than previous estimates. Based on the red giant branch curvature, we derive a metallicity somewhat h igher than that of NGC 6553, probably solar.