• A comparison of radio axis with host galaxy plane axis in Seyfert galaxies 

      Schmitt, Henrique Roberto; Kinney, Anne Louise; Storchi-Bergmann, Thaisa; Antonucci, Robert (1997) [Artigo de periódico]
      We use the radio axis as an indicator of the orientation of the obscuring torus in Seyfert galaxies and analyze the di†erence between the position angles of extended radio structures and host galaxy major axis of Seyfert ...
    • Maps of the distribution of atomic hydrogen in a region in centaurus 

      Vieira, Edemundo da Rocha (1971) [Artigo de periódico]
      We have made a survey of the region 302° ≤ l ≤ 310°, 2° ≤ b ≤ 12° at the frequency of the hydrogen line. We have detected three elongated features that run parallel to the galactic plane at heights of about 200 pc above ...
    • The difference between the narrow-line regions of Seyfert 1 and Seyfert 2 galaxies 

      Schmitt, Henrique Roberto (1998) [Artigo de periódico]
      This paper presents a comparative study of emission-line ratios of the narrow-line regions (NLRs) of Seyfert 1 and Seyfert 2 galaxies. It includes a literature compilation of the emission-line fluxes [O II] λ3727, [Ne III] ...