Listar Ciencias Exactas y Naturales por autor "McGregor, Peter J."

Mostrando ítems 1-8 de 8

    • Feeding versus feedback in NGC 1068 probed with Gemini NIFS – I. Excitation 

      Riffel, Rogemar André; Vale, Tibério Borges; Storchi-Bergmann, Thaisa; McGregor, Peter J. (2014) [Artículo de periódico]
      We present emission-line flux distributions and ratios for the inner ≈200 pc of the narrowline region (NLR) of the Seyfert 2 galaxy NGC 1068, using observations obtained with the Gemini Near-infrared Integral Field ...

    • Feeding versus feedback in NGC4151 probed with Gemini NIFS – I. Excitation 

      Storchi-Bergmann, Thaisa; McGregor, Peter J.; Riffel, Rogemar André; Lopes, Ramiro Duarte Simões; Beck, Tracy; Dopita, Michael A. (2009) [Artículo de periódico]
      We have used the Gemini Near-infrared Integral Field Spectrograph (NIFS) to map the emission-line intensity distributions and ratios in the narrow-line region (NLR) of the Seyfert galaxy NGC4151 in the Z, J, H and K bands ...

    • Feeding versus feedback in NGC4151 probed with Gemini NIFS – II. Kinematics 

      Storchi-Bergmann, Thaisa; Lopes, Ramiro Duarte Simões; McGregor, Peter J.; Riffel, Rogemar André; Beck, Tracy; Martini, Paul (2010) [Artículo de periódico]
      We have used the Gemini Near-infrared Integral Field Spectrograph (NIFS) to map the gas kinematics of the inner ~200 × 500 pc 2 of the Seyfert galaxy NGC4151 in the Z, J, H and K bands at a resolving power of ≥5000 and ...

    • Mapping of molecular gas inflow towards the Seyfert nucleus of NGC 4051 using Gemini NIFS 

      Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Winge, Claudia; McGregor, Peter J.; Beck, Tracy; Schmitt, Henrique Roberto (2008) [Artículo de periódico]
      We present 2D stellar and gaseous kinematics of the inner ~ 130×180 pc² of the Narrow-Line Seyfert 1 galaxy NGC4051 at a sampling of 4.5 pc, from near-infrared K-band spectroscopic observations obtained with the Gemini’s ...

    • Modelling the [Fe II] λ1.644 μm outflow and comparison with H2 and H+ kinematics in the inner 200 pc of NGC 1068 

      Barbosa, Fausto Kuhn Berenguer; Storchi-Bergmann, Thaisa; McGregor, Peter J.; Vale, Tibério Borges; Riffel, Rogemar André (2014) [Artículo de periódico]
      We map the kinematics of the inner (200 pc) narrow-line region (NLR) of the Seyfert 2 galaxy NGC 1068 using the instrument Near-infrared Integral Field Spectrograph and adaptive optics at the Gemini North telescope. Channel ...

    • The black hole mass of NGC 4151. II. Stellar dynamical measurement from near-infrared field spectroscopy 

      Onken, Christopher Alan; Valluri, Monica; Brown, Jonathan S.; McGregor, Peter J.; Peterson, Bradley M.; Bentz, Misty Cherie; Ferrarese, Laura; Pogge, Richard William; Vestergaard, Marianne; Storchi-Bergmann, Thaisa; Riffel, Rogemar André (2014) [Artículo de periódico]
      We present a revised measurement of themass of the central black hole (MBH ) in the Seyfert 1 galaxyNGC4151. The new stellar dynamical mass measurement is derived by applying an axisymmetric orbit-superposition code to ...

    • The dusty nuclear torus in NGC 4151 : constraints from gemini near-infrared integral field spectrograph observations 

      Riffel, Rogemar André; Storchi-Bergmann, Thaisa; McGregor, Peter J. (2009) [Artículo de periódico]
      We have used a near-infrared (near-IR) nuclear spectrum (covering the Z, J, H, and K bands) of the nucleus of NGC 4151 obtained with the Gemini Near-Infrared Integral Field Spectrograph (NIFS) and adaptive optics, to isolate ...

    • Two-dimensional mapping of young stars in the inner 180 pc of NGC 1068 : correlation with molecular gas ring and stellar kinematics 

      Storchi-Bergmann, Thaisa; Riffel, Rogemar André; Riffel, Rogério; Diniz, Marlon Rodrigo; Vale, Tibério Borges; McGregor, Peter J. (2012) [Artículo de periódico]
      We report the first two-dimensional mapping of the stellar population and non-stellar continua within the inner 180 pc (radius) of NGC 1068 at a spatial resolution of 8 pc, using integral field spectroscopy in the ...