Astrophysical: Galaxies

  • Publication
    The origin of the ionization of the diffuse interstellar medium in spiral galaxies. I. Photometric measurements
    We present a complete study of the diffuse ionized gas (DIG) in a sample of six spiral galaxies (NGC 157, NGC 3359, NGC 3631, NGC 6764, NGC 6951, NGC 7479)...
  • Publication
    The origin of the ionization of the diffuse ionized gas in spirals. II. Modelling the distribution of ionizing radiation in NGC 157
    In this paper we make a quantitative study of the hypothesis that the diffuse Hα emitted from the discs of spiral galaxies owes its origin to the ionizing...
  • Publication
    The origin of the IR emission of low-luminosity AGN
    To test recent suggestions that the infrared emission of low-luminosity AGN arises in a truncated thin accretion disk, we compare recent, high-resolution IR...
  • Publication
    The origin of the light distribution in spiral galaxies
    We analyse a high-resolution, fully cosmological, hydrodynamical disc galaxy simulation, to study the source of the double-exponential light profiles seen in...
  • Publication
    The origin of the LMC stellar bar: clues from the SFH of the bar and inner disc
    We discuss the origin of the Large Magellanic Cloud (LMC) stellar bar by comparing the star formation histories (SFHs) obtained from deep colour-magnitude...
  • Publication
    The origin of the mid-infrared nuclear polarization of active galactic nuclei
    We combine new (NGC 1275, NGC 4151, and NGC 5506) and previously published (Cygnus A, Mrk 231, and NGC 1068) sub-arcsecond resolution mid-infrared (MIR; 8-13 μm...
  • Publication
    The origin of the most luminous Planetary Nebulae
    As part of a systematic effort to characterize the properties and progenitors of the most luminous planetary nebulae (PNe), we obtained a sample among the...
  • Publication
    The Origin of the Relation between Metallicity and Size in Star-forming Galaxies
    For the same stellar mass, physically smaller star-forming galaxies are also metal richer. What causes the relation remains unclear. The central star-forming...
  • Publication
    The Origins of Planetary Nebulae in the Inner and Outer Disks of M 31
    The planetary nebulae (PNe) of M 31 are receiving considerable attention as probes of its structure and chemical evolution in a galactic environment that is...