Browsing Meeting minutes, announcements and publications from RIT Colleges by Subject "Galaxies-Seyfert"

Now showing items 1-14 of 14

    • Equatorial scattering and the structure of the broad-line region in Seyfert nuclei: Evidence for a rotating disc 

      Smith, James; Robinson, Andrew; Young, Stuart; Axon, David; Corbett, Elizabeth (Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2005-05)
      We present detailed scattering models confirming that distinctive variations in polarization across the broad Halpha line, which are observed in a significant fraction of Seyfert 1 galaxies, can be understood in terms of ...

    • Gas dynamics in the barred Seyfert galaxy NGC4151 - II. High resolution HI study 

      Mundell, Carole; Pedlar, Alan; Shone, David; Robinson, Andrew (Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 1999-04)
      We present sensitive, high angular resolution (6′′ × 5′′) λ21-cm observations of the neutral hydrogen in the nearby barred Seyfert galaxy, NGC4151. These HI observations, obtained using the VLA in B-configuration, are the ...

    • High-resolution radio observations of Seyfert galaxies in the extended 12-micron sample - I. The Observations 

      Thean, Andy; Pedlar, Alan; Kukula, Marek; Baum, Stefi; O'Dea, Christopher (Blackwell Publishing, 2000-05)
      We present 8.4 GHz VLA A–configuration observations of 87 sources from the mid–infrared–selected AGN sample of Rush et al. (1993). These 0.25 arcsec resolution observations allow elongated radio structures tens of parsecs ...

    • High-resolution radio observations of Seyfert galaxies in the extended 12-micron sample - II. The Properties of compact radio components 

      Thean, Andy; Pedlar, Alan; Kukula, Marek; Baum, Stefi; O'Dea, Christopher (Blackwell Publishing, 2001-08)
      We discuss the properties of compact nuclear radio components in Seyfert galaxies from the extended 12 µm AGN sample of Rush et al. (1993). Our main results can be summarised as follows. Type 1 and type 2 Seyferts produce ...

    • Jet driven motions in the Narrow Line region of NGC1068 

      Axon, David; Marconi, Alessandro; Capetti, Alessandro; Macchetto, Duccio; Schreier, Ethan; Robinson, Andrew (Springer Netherlands: Astrophysics and Space Science, 1997-03)
      We have obtained HST FOC f/48 long-slit spectroscopy of the inner 4" of the Narrow Line Region of NGC 1068 between 3500-5400A with a spectral resolution of 1.78A/pixel. At a spatial scale of 0.0287" per pixel these data ...

    • Seyferts on the edge: Polar scattering and orientation-dependent polarization in Seyfert 1 nuclei 

      Smith, James; Robinson, Andrew; Alexander, David; Young, Stuart; Axon, David; Corbett, Elizabeth (Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2004-05)
      We have identified 12 Seyfert 1 galaxies that exhibit optical polarization spectra similar to those of Seyfert 2 galaxies in which polarized broad-lines are detected. We present new spectropolarimetric observations of 3 ...

    • A spectropolarimetric atlas of Seyfert 1 galaxies 

      Smith, James; Young, Stuart; Robinson, Andrew; Corbett, Elizabeth; Giannuzo, Ester; Axon, David; Hough, James (Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2002-09-27)
      We present optical spectropolarimetry of the nuclei of 36 Seyfert 1 galaxies, obtained with the William Herschel and the Anglo–Australian Telescopes from 1996 to 1999. In 20 of these, the optical emission from the active ...