Listar Ciencias Exactas y Naturales por autor "Ortiz, Roberto Pereira"

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    • A survey of early-type stars based on the Two Micron All Sky Survey database 

      Ortiz, Roberto Pereira; Malacarne, Marcio; Wilhelm, Ronald; Costa, R. D. D.; Rossi, Silvia; Maciel, Walter Junqueira (2007) [Artículo de periódico]
      We report the results of a spectroscopic survey of blue stars near the south Galactic pole, selected according to their color indices in the 2MASS database. The main scope of this work is to determine the nature of the ...