Astrophysical: Astronomical models

  • Publication
    Probing photoionization models in two well-studied extended emission-line regions - Centaurus A and 3C 227
    The observed emission-line ratios of the extended emission-line regions of Cen A and 3C 227 are compared with the theoretical results from photoionization...
  • Publication
    Quasar H-beta profiles and discs
    High signal-to-noise spectra of the H-beta region of eight radio-loud quasars are presented in an investigation seeking evidence for the emission of this line...
  • Publication
    Red giant stragglers and He white dwarfs in galactic globulars
    The evolutionary scenario concerning the production and the cooling of He white dwarfs is revisited and discussed. We show that, for a given star metallicity...
  • Publication
    SALT3-NIR: Taking the Open-source Type Ia Supernova Model to Longer Wavelengths for Next-generation Cosmological Measurements
    A large fraction of Type Ia supernova (SN Ia) observations over the next decade will be in the near-infrared (NIR), at wavelengths beyond the reach of the...
  • Publication
    Stochasticity in galactic models
    The effect of a spiral-like perturbation in the orbits of an axisymmetric galactic potential is studied using surfaces of section. It is found that the...
  • Publication
    Submillimetre wave astronomy
    Observations in the 100-1000-micron band and the instruments used to obtain them are discussed in contributions to the Submillimeter Wave Astronomy Conference...
  • Publication
    The galactic wind in the circum-nuclear zone of NGC 6946
    Using the H-II region H-alpha emission detected in high-resolution long slit spectra of the normal spiral NGC 6946 out to 6 kpc from the center, and along 8...
  • Publication
    The interacting system NGC 7753-7752 (Arp 86). I - BVRI photometry
    BVRI surface photometry is presented for the interacting galaxy pair Arp 86 (NGC 7753-7752). Deep high-resolution images were obtained in order to study the...
  • Publication
    The near-infrared-optical-ultraviolet emission of BL Lacertae objects
    Near-infrared, optical, and ultraviolet quasi-simultaneous observations of 11 BL Lacertae objects are reported. For all but one source the dereddened spectral...