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Colour Magnitude Diagrams of the moderately metal-rich globular clusters NGC 6569 and Palomar 11 *

Authors :
Ortolani, S.
Bica, E.
Barbuy, B.
Ortolani, S.
Bica, E.
Barbuy, B.
Source :
Astronomy and Astrophysics; August 2001, Vol. 374 Issue: 2 p564-569, 6p
Publication Year :
2001

Abstract

For the first time Colour-Magnitude Diagrams are presented for NGC 6569 and Palomar 11. NGC 6569 is a rather concentrated cluster whereas Palomar 11 is loose and sparsely populated. Cluster parameters are derived from Vand Iphotometry. These are red Horizontal Branch globular clusters, with metallicities comparable to that of 47 Tucanae. We derive a reddening $E(B-V) \approx 0.53$and a distance from the Sun $d_{\odot} \approx 9.8$kpc for NGC 6569, and $E(B-V) \approx 0.35$and $d_{\odot} \approx 13.2$kpc for Palomar 11. NGC 6569 is located in the bulge, while Palomar 11, despite its rather high metallicity, is in the inner halo, a rare case similar to that of 47 Tucanae.

Details

Language :
English
ISSN :
00046361 and 14320746
Volume :
374
Issue :
2
Database :
Supplemental Index
Journal :
Astronomy and Astrophysics
Publication Type :
Periodical
Accession number :
ejs53260090
Full Text :
https://doi.org/10.1051/0004-6361:20010753