Browsing University of Hertfordshire by Author "Schartmann, M."

Now showing items 1-5 of 5

    • Gas dynamics of the central few parsec region of NGC 1068 fuelled by the evolving nuclear star cluster 

      Schartmann, M.; Burkert, A.; Krause, Martin; Camenzind, M.; Meisenheimer, K.; Davies, R.~I. (2010-04-21)
      Recently, high-resolution observations with the help of the near-infrared adaptive optics integral field spectrograph Spectrograph for INtegral Field Observations in the Near Infrared (SINFONI) at the Very Large Telescope ...

    • Magnetohydrodynamic stability of broad line region clouds 

      Krause, Martin; Schartmann, M.; Burkert, A. (2012-10-01)
      Hydrodynamic stability has been a longstanding issue for the cloud model of the broad line region in active galactic nuclei. We argue that the clouds may be gravitationally bound to the supermassive black hole. If true, ...

    • Radiation feedback on dusty clouds during Seyfert activity 

      Schartmann, M.; Krause, Martin; Burkert, A. (2011-07-21)
      We investigate the evolution of dusty gas clouds falling into the centre of an active Seyfert nucleus. 2D high-resolution radiation hydrodynamics simulations are performed to study the fate of single clouds and the interaction ...

    • Stability of cloud orbits in the broad-line region of active galactic nuclei 

      Krause, M.; Burkert, A.; Schartmann, M. (2011-02-11)
      We investigate the global dynamic stability of spherical clouds in the broad-line region (BLR) of active galactic nuclei (AGN), exposed to radial radiation pressure, gravity of the central black hole (BH) and centrifugal ...

    • Stellar feedback efficiencies: supernovae versus stellar winds 

      Fierlinger, K.~M.; Burkert, A.; Ntormousi, E.; Fierlinger, P.; Schartmann, M.; Ballone, A.; Krause, M.~G.~H.; Diehl, R. (2016-02-11)
      Stellar winds and supernova (SN) explosions of massive stars (`stellar feedback') create bubbles in the interstellar medium (ISM) and insert newly produced heavy elements and kinetic energy into their surroundings, possibly ...