Metal-rich globular clusters : giant branch morphology as a metallicity criterion
In: Astronomy and astrophysics (Berlin. Print), Jg. 249 (1991), Heft 2, S. L31- (3S.)
Online
academicJournal
- print, 13 ref
Zugriff:
We have obtained VI CCD photometry of the very metal-rich inner bulge globular clusters NGC 6528, NGC 6553 and Ter 1, and of 47 Tuc and NGC 6356, which are usually called metal-rich clusters. We discuss the RGB morphology in the V vs. (V-I) and I vs. (V-I) diagrams for ranking the metallicities of these clusters. We used the arc-like structure present in their RGB, due to blanketing in the cooler giants, as a metallicity criterion, which is corroborated by line strengths in integrated spectra. We propose criteria of morphological parameters based on RGB inclination for increasing metallicities. We conclude that Terzan 1 is the most metal-rich globular cluster of this sample.
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Metal-rich globular clusters : giant branch morphology as a metallicity criterion
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Autor/in / Beteiligte Person: | ORTOLANI, S ; BARBUY, B ; BICA, E |
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Zeitschrift: | Astronomy and astrophysics (Berlin. Print), Jg. 249 (1991), Heft 2, S. L31- (3S.) |
Veröffentlichung: | Les Ulis: EDP Sciences, 1991 |
Medientyp: | academicJournal |
Umfang: | print, 13 ref |
ISSN: | 0004-6361 (print) |
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