Navegação Ciências Exatas e da Terra por Autor "Binette, Luc"

Resultados 1-8 de 8

    • Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates 

      Dors Júnior, Oli Luiz; Valerdi, Mabel; Riffel, Rogemar André; Riffel, Rogério; Cardaci, Mónica V.; Hägelle, Guillermo Federico; Armah, Mark; Revalski, Mitchell; Flury, Sophia; Freitas-Lemes, Priscila; Amôres, Eduardo Brescansin de; Krabbe, Angela Cristina; Binette, Luc; Feltre, Anna; Storchi-Bergmann, Thaisa (2023) [Artigo de periódico]
      For the first time, the sulphur abundance relative to hydrogen (S/H) in the narrow-line regions of a sample of Seyfert 2 nuclei (Sy 2s) has been derived via direct estimation of the electron temperature. Narrow emission-line ...

    • Excitation and temperature of extended gas in active galaxies. II Photoionization models with matter-bounded clouds 

      Binette, Luc; Wilson, Andrew S.; Storchi-Bergmann, Thaisa (1996) [Artigo de periódico]
      Recent reliable measurements of the weak lines of [O III]λ4363, He IIλ4686 and [Ne V]λ3426 seen in emission in extended and nuclear regions of AGN (Storchi-Bergmann et al. 1996) are used to discriminate between different ...

    • Excitation and temperature of extended gas in active galaxies. I Observations 

      Storchi-Bergmann, Thaisa; Wilson, Andrew S.; Binette, Luc; Mulchaey, John Scott (1996) [Artigo de periódico]
      We have obtained long-slit spectroscopy of five active galaxies showing extended high excitation emission lines reaching distances of several kiloparsecs from the nuclei. Measurement of the fluxes of weak lines, such as ...

    • On the nature of Seyfert galaxies with high [O III] λ5007 blueshifts 

      Komossa, S.; Xu, D.; Zhou, H.; Storchi-Bergmann, Thaisa; Binette, Luc (2008) [Artigo de periódico]
      We have studied the properties of Seyfert galaxies with high [O III] λ5007 blueshifts (‘‘blue outliers’’), originally identified because of their strong deviation from the MBH-σ relation of normal, narrow-line Seyfert 1 ...

    • Photoionization of very high excitation gas in circinus galaxy and other active galactic nuclei 

      Binette, Luc; Wilson, Andrew S.; Raga, Alex; Storchi-Bergmann, Thaisa (1997) [Artigo de periódico]
      Recent measurements of the Circinus galaxy with ISO by Moorwood et al. (1996) have confirmed the extremely high excitation of the emission-line spectrum in this active galaxy. Moorwood et al. modelled the spectrum in terms ...

    • The extended narrow-line region of the Seyfert 1 galaxy ESO 362-G18 versus that of the Seyfert 2 galaxy ESO 362-G8 

      Fraquelli, Henrique Aita; Storchi-Bergmann, Thaisa; Binette, Luc (2000) [Artigo de periódico]
      We use long-slit spectroscopic data to study in detail the extended narrow-line regions (ENLRs) of the Seyfert 1 galaxy ESO 362-G18 and Seyfert 2 galaxy ESO 362-G8. These two galaxies have similar emission-line luminosities ...

    • The narrow-line region of narrow-line Seyfert 1 galaxies 

      Rodriguez-Ardila, Alberto; Binette, Luc; Pastoriza, Miriani Griselda; Donzelli, Carlos J. (2000) [Artigo de periódico]
      This work studies the optical emission-line properties and physical conditions of the narrow-line region (NLR) of seven narrow-line Seyfert 1 galaxies (NLS1's) for which high signal-to-noise ratio spectroscopic observations ...

    • The temperature of extended gas in active galaxies : evidence for matter-bounded clouds 

      Wilson, Andrew S.; Binette, Luc; Storchi-Bergmann, Thaisa (1997) [Artigo de periódico]
      We report measurements of the electron temperature at about a dozen locations in the extended emission-line regions of five active (Seyfert and radio) galaxies. Temperatures (T[O III] and T[N II]) have been determined from ...