Navegação Ciências Exatas e da Terra por Assunto "Globular clusters: individual: NGC 6558"

Resultados 1-2 de 2

    • Gemini/Phoenix H-band analysis of the globular cluster AL 3 

      Barbuy, Beatriz; Ernandes, Heitor; Souza, Stefano O.; Razera, Roberta Ferreira; Moura, Tatiana; Meléndez, Jorge; Pérez Villegas, Maria de Los Angeles; Zoccali, Manuela; Minniti, Dante; Dias, Bruno Moreira de Souza; Ortolani, Sergio; Bica, Eduardo Luiz Damiani (2021) [Artigo de periódico]
      The globular cluster AL 3 is old and located in the inner bulge. Three individual stars were observed with the Phoenix spectrograph at the Gemini South telescope. The wavelength region contains prominent lines of CN, OH, ...

    • High-resolution abundance analysis of four red giants in the globular cluster NGC 6558 

      Barbuy, Beatriz; Muniz, Leone V.; Ortolani, Sergio; Ernandes, Heitor; Dias, Bruno Moreira de Souza; Saviane, Ivo; Kerber, Leandro de Oliveira; Bica, Eduardo Luiz Damiani; Pérez Villegas, Maria de Los Angeles; Rossi, Luca James; Held, Enrico V. (2018) [Artigo de periódico]
      Context. NGC 6558 is a bulge globular cluster with a blue horizontal branch (BHB), combined with a metallicity of [Fe/H] ≈ −1.0. It is similar to HP 1 and NGC 6522, which could be among the oldest objects in the Galaxy. ...