Navegação Ciências Exatas e da Terra por Autor "Cassisi, Santi"
Resultados 1-3 de 3
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Age and metallicity distribution of the galactic bulge from extensive optical and near-IR stellar photometry
Zoccali, Manuela; Renzini, Alvio; Ortolani, Sergio; Greggio, Laura; Saviane, Ivo; Cassisi, Santi; Rejkuba, Marina; Barbuy, Beatriz; Rich, Robert Michael; Bica, Eduardo Luiz Damiani (2003) [Artigo de periódico]We present a new determination of the metallicity distribution, age, and luminosity function of the Galactic bulge stellar population. By combining near-IR data from the 2MASS survey, from the SOFI imager at ESO NTT and ... -
Ages of the bulge globular clusters NGC 6522 and NGC 6626 (M28) from HST proper-motion-cleaned color–magnitude diagrams
Kerber, Leandro de Oliveira; Nardiello, Domenico; Ortolani, Sergio; Barbuy, Beatriz; Bica, Eduardo Luiz Damiani; Cassisi, Santi; Libralato, Mattia; Vieira, Rodrigo G. (2018) [Artigo de periódico]Bulge globular clusters (GCs) with metallicities [Fe/H]−1.0 and blue horizontal branches are candidates to harbor the oldest populations in the Galaxy. Based on the analysis of HST proper-motion-cleaned color–magnitude ... -
HST NICMOS photometry of the reddened bulge globular clusters NGC 6528, Terzan 5, Liller 1, UKS 1 and Terzan 4
Ortolani, Sergio; Barbuy, Beatriz; Bica, Eduardo Luiz Damiani; Renzini, Alvio; Zoccali, Manuela; Rich, Robert Michael; Cassisi, Santi (2001) [Artigo de periódico]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) ...