Navegação Ciências Exatas e da Terra por Assunto "Blue stragglers"

Resultados 1-3 de 3

    • Infrared array photometry of bulge globular clusters I. Combined ground based JK and HST VI photometry of NGC 6553 

      Guarnieri, M.D.; Ortolani, Sergio; Montegriffo, P.; Renzini, Alvio; Barbuy, Beatriz; Bica, Eduardo Luiz Damiani; Moneti, Andrea (1998) [Artigo de periódico]
      JK infrared photometry for the bulge globular cluster NGC 6553, combined with high resolution visual VI observations are presented and discussed in connection with the bulge metal rich population. The infrared data were ...

    • New SX Phe variables in the globular cluster NGC 288 

      Martinazzi, Elizandra; Kepler, Souza Oliveira; Costa, Jose Eduardo da Silveira; Pieres, Adriano; Bonatto, Charles Jose; Bica, Eduardo Luiz Damiani; Fraga, Luciano (2015) [Artigo de periódico]
      We report the discovery of two new variable stars in the metal-poor globular cluster NGC 288, found by means of time series CCD photometry. We classified the new variables as SX Phoenicis (SX Phe) due to their characteristic ...

    • Young star clusters in the Large Magellanic Cloud : NGC 1805 and 1818 

      Johnson, Rachel A.; Beaulieu, Sylvie F.; Gilmore, Gerard Fitzgerald; Hurley, Jarrod; Santiago, Basilio Xavier; Tanvir, Nial R.; Elson, Rebecca A.W. (2001) [Artigo de periódico]
      We present colour-magnitude diagrams for two rich (~~104 M̛) Large Magellanic Cloud star clusters with ages ~~ 107 yr, constructed from optical and near-infrared data obtained with the Hubble Space Telescope. These data ...