HST NICMOS photometry of the reddened bulge globular clusters NGC 6528, Terzan 5, Liller 1, UKS 1 and Terzan 4
dc.contributor.author | Ortolani, Sergio | pt_BR |
dc.contributor.author | Barbuy, Beatriz | pt_BR |
dc.contributor.author | Bica, Eduardo Luiz Damiani | pt_BR |
dc.contributor.author | Renzini, Alvio | pt_BR |
dc.contributor.author | Zoccali, Manuela | pt_BR |
dc.contributor.author | Rich, Robert Michael | pt_BR |
dc.contributor.author | Cassisi, Santi | pt_BR |
dc.date.accessioned | 2014-07-24T02:04:19Z | pt_BR |
dc.date.issued | 2001 | pt_BR |
dc.identifier.issn | 0004-6361 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/98502 | pt_BR |
dc.description.abstract | We present results from NICMOS Hubble Space Telescope observations of the reddened bulge globular clusters NGC 6528, Terzan 5, Liller 1, UKS 1 and Terzan 4, obtained through the filters F110W (1.1 μm) and F160W (1.6 μm) (nearly equivalent to J and H). For the first time the turnoff region of Liller 1 and the main sequence of Terzan 5 and Terzan 4 are reached, as well as the horizontal branch of UKS 1. The magnitude difference between the turno and the red horizontal branch Δm₁₁₀ = mHB₁₁₀ − mTO₁₁₀ is used as an age indicator. From comparisons with new isochrones in the NICMOS photometric system, we conclude that the two metal-rich clusters NGC 6528 and Terzan 5 are coeval within uncertainties (~20%) with 47 Tucanae. Liller 1 and UKS 1 are confirmed as metal-rich globular clusters. Terzan 4 is confirmed as an interesting case of a metal-poor cluster in the bulge with a blue horizontal branch. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Astronomy and astrophysics. Les Ulis. Vol. 376, no. 3 (Sept. 2001), p. 878-884 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Galaxia | pt_BR |
dc.subject | Galaxy: globular clusters: individual: NGC 6528, Terzan 5, Liller 1, Terzan 4 UKS 1 | en |
dc.subject | Aglomerados estelares globulares | pt_BR |
dc.subject | Stars: CM diagram | en |
dc.subject | Evolucao estelar | pt_BR |
dc.subject | Fotometria estelar | pt_BR |
dc.title | HST NICMOS photometry of the reddened bulge globular clusters NGC 6528, Terzan 5, Liller 1, UKS 1 and Terzan 4 | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000311393 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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