Astrophysical: Astronomical models

  • Publication
    Extended line emission in AGN: Looking at the central engine
    The regions of high excitation gas detected around various Active Galactic Nuclei (AGN) are examined. The radiation emitted by the nucleus may be responsible...
  • Publication
    Families of galaxies in the mu(e)-R(e) plane
    It is shown on the basis of a complete sample of Virgo cluster galaxies and a larger set of varied data from the literature that ellipticals, early-type dwarfs...
  • Publication
    Forces on magnetic flux tubes moving in inhomogeneous flows
    The back-reaction of an incompressible two-dimensional flow of constant strain to the accelerated motion of a straight cylinder is calculated in the general...
  • Publication
    Galactic evolution of the light-element isotopes
    The galactic evolution of the abundances of the light-element isotopes (6Li, 7Li, 9Be, 10B, and 11B) is re-examined in view of recent measurements of the 7Li...
  • Publication
    Gas kinematics in the nucleus of NGC 6946
    A complex kinematical structure is inferred from the analysis of high resolution spectra of the nuclear region of the galaxy NGC 6946. The spatial resolution of...
  • Publication
    High-resolution rotation curves of NGC 7626: Dynamics of a young kinematically peculiar core
    The velocity field of the central parts of the elliptical galaxy NGC 7626 has been mapped by obtaining high resolution curves and velocity dispersion profiles...
  • Publication
    Improvement of the Hubble diagram for QSO's leading towards g(O)
    Using the predictions of the Lynden Bell/Hills model of the energy source of QSO's in which discrete packets of matter (e.g., stars) are converted into...
  • Publication
    Infrared Spectroscopy Of V404 CYGNI. Limits On The Accretion Disc Contamination
    We have obtained for the first time 2.10 - 2.45 micron infrared spectra of soft X-ray transient V404 Cygni. We determine a 95 percent confidence upper limit to...
  • Publication
    Infrared studies of Seyfert galaxies and of the irregular galaxy M 82
    Middle and far infrared studies of the irregular galaxy M 82 and of Seyfert galaxies are presented. M 82 was observed spectrophotometrically from 8 to 13...