Journal: Astrophysics and Space Science

  • Publication
    Circumstellar Material around the Proto-PNe IRAS 10178--5958 and IRAS 11065--6026
    Spectroscopy of Hen 401 (IRAS 10178-5958) and WRA 751 (IRAS 11065-6026) reveal strong HI, HeI, FeII and forbidden emission lines. Images of Hen 401 reveal the...
  • Publication
    CLÉS, Code Liégeois d'Évolution Stellaire
    CLÉS is an evolution code recently developed to produce stellar models meeting the specific requirements of studies in asteroseismology. It offers the users a...
  • Publication
    Clues to Substellar Formation: Rotation and the Low-Mass End of the Initial Mass Function
    We have monitored S Ori 45, a young, low-mass (20 M j up) brown dwarf of the σ Orionis cluster (˜3 Myr, 352 pc), using optical and near-infrared filters. S Ori...
  • Publication
    Collisional enhancement of H i Balmer lines in photoionized nebulae
    Collisional excitation of neutral hydrogen atoms can significantly increase the intensity of Balmer lines with respect to pure recombination. If this effect is...
  • Publication
    Compact Groups of Galaxies: Evolution of the Stellar Population
    We present a study focusing on the nature of compact groups (CGs) through the study of their elliptical (E) galaxies. Parameters describing the internal...
  • Publication
    Comparing peanut-shaped `bulges' to N-body simulations and orbital calculations
    We present a near-infrared K n-band photometric study of edge-on galaxies with a box/ peanut-shaped `bulge'. The morphology of the galaxies is analysed using...
  • Publication
    Cones of Ionizing Radiation in Active Galaxies - Probing the Central Engine
    Highly ionized gas has been detected at large distances from the nucleus in several classes of active galaxies. There is evidence that photoionization by the...
  • Publication
    Confidence Limits of Evolutionary Synthesis Models
    The probabilistic nature of the IMF in stellar systems implies that clusters of the same mass and age do not present the same unique values of their observed...
  • Publication
    Coordinated Observations of the Red Dwarf Flare Star EV Lac in 1993
    Results of cooperative observations of the flare star EV Lac in September 1993 are presented. One of the about 30 optical flares detected was powerful enough to...