Listar Ciencias Exactas y Naturales por autor "Raimann, Daniel Iunes"

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    • Gas properties of H II and starburst galaxies : relation with the stellar population 

      Raimann, Daniel Iunes; Storchi-Bergmann, Thaisa; Bica, Eduardo Luiz Damiani; Melnick, Jorge; Schmitt, Henrique Roberto (2000) [Artículo de periódico]
      We study the gas emission of galaxies with active star formation, consisting mostly of H II and starburst galaxies, as well as some Seyfert 2 galaxies, and determine chemical and physical parameters. The data consist of ...

    • Population synthesis of H II galaxies 

      Raimann, Daniel Iunes; Bica, Eduardo Luiz Damiani; Storchi-Bergmann, Thaisa; Melnick, Jorge; Schmitt, Henrique Roberto (2000) [Artículo de periódico]
      We study the stellar population of galaxies with active star formation, determining ages of the stellar components by means of spectral population synthesis of their absorption spectra. The data consist of optical spectra ...

    • Stellar population gradients in normal and active galaxies 

      Raimann, Daniel Iunes; Storchi-Bergmann, Thaisa; Bica, Eduardo Luiz Damiani; Alloin, Danielle Marie (2001) [Artículo de periódico]
      We use high signal-to-noise ratio long-slit spectra in the λλ3500–7000-Å range of three early-type (Hubble type S0) normal, two low-ionization nuclear emission region (LINER) and three Seyfert 2 galaxies to make a comparative ...

    • Stellar population gradients in Seyfert 2 galaxies : northern sample 

      Raimann, Daniel Iunes; Storchi-Bergmann, Thaisa; González Delgado, Rosa M.; Fernandes Junior, Roberto Cid; Heckman, Timothy M.; Leitherer, Claus; Schmitt, Henrique Roberto (2003) [Artículo de periódico]
      We use high signal-to-noise ratio long-slit spectra in the λλ3600–4700 range of the 20 brightest northern Seyfert 2 galaxies to study the variation of the stellar population properties as a function of distance from the ...

    • Stellar populations in a complete sample of local radio galaxies 

      Raimann, Daniel Iunes; Storchi-Bergmann, Thaisa; Quintana, Henrique; Hunstead, Richard W.; Wisotzki, Lutz (2005) [Artículo de periódico]
      We investigate the nature of the continuum emission and stellar populations in the inner 1–3 kpc of a complete sample of 24 southern radio galaxies, and we compare the results with a control sample of 18 non-active early-type ...

    • The frequency of nuclear star formation in Seyfert 2 galaxies 

      Storchi-Bergmann, Thaisa; Raimann, Daniel Iunes; Bica, Eduardo Luiz Damiani; Fraquelli, Henrique Aita (2000) [Artículo de periódico]
      We investigate the detectability of starburst signatures in the nuclear spectrum of Seyfert 2 galaxies by constructing spectral models in the wavelength range λλ3500-4100, combining the spectrum of a bulge population (of ...