• Ages and metallicities of circumnuclear star formation regions from Gemini IFU observations 

      Dors Júnior, Oli Luiz; Storchi-Bergmann, Thaisa; Riffel, Rogemar André; Schmidt, Alex Andre (2008) [Artigo de periódico]
      Aims. We derive the age and metallicity of circumnuclear star formation regions (CNSFRs) located in the spiral galaxies NGC6951 and NGC1097 and investigate the cause of the very low equivalent widths of emission lines found ...
    • A study of the neglected Galactic HII region NGC 2579 and its companion ESO 370-9 

      Copetti, Marcus Vinicius Fontana; Oliveira, Vinicius de A.; Riffel, Rogério; Castañeda, Héctor O.; Sanmartim, D. (2007) [Artigo de periódico]
      Context. The Galactic Hii region NGC 2579 has stayed undeservedly unexplored due to identification problems which persisted until recently. Both NGC 2579 and its companion ESO 370-9 have been misclassified as planetary or ...