Metal abundances of RR lyrae stars in the globular clusters NGC 6712 and NGC 6723
Journal Article
·
· Astrophys. J.; (United States)
The spectroscopic metal abundance parameter ..delta..S has been measured for RR Lyrae stars in the globular clusters NGC 6712 and NGC 6723. Mean ..delta..S values are 2.6 +- 0.4 for NGC 6712 and 2.8 +- 0.5 for NGC 6723, corresponding to (Fe/H)approx.-0.7 on Butler's abundance scale. This iron abundance is considerably higher than those found for 47 Tuc and M71 in recent analyses of high dispersion spectra of red giant stars.
- Research Organization:
- Mount Wilson and Las Campanas Observatories of the Carnegie Institution of Washington
- OSTI ID:
- 5522871
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 250:2; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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