Astrophysical: Planetary nebulae

  • Publication
    Local Group Galaxies: Abundances in NGC 3109
    We present preliminary results of VLT spectroscopy follow-up of Planetary Nebulae (PNe) and HII regions in the dwarf Irregular galaxy NGC 3109. In total we have...
  • Publication
    Low-ionization pairs of knots in planetary nebulae: physical properties and excitation
    We obtained optical long-slit spectra of four planetary nebulae (PNe) with low-ionization pair of knots, namely He 1-1, IC 2149, KjPn 8 and NGC 7662. These data...
  • Publication
    Low-Ionization Structures in Planetary Nebulae: Confronting Models with Observations
    Around 50 planetary nebulae (PNs) are presently known to possess ``small-scale'' low-ionization structures (LISs) located inside or outside their main nebular...
  • Publication
    Low-mass companions to Bright Giants
    Asymmetric Planetary Nebulae (APN) are formed by bipolar outflows through various mechanism like fast rotation (Blackman et al. 2001), magnetic field (Regos &...
  • Publication
    M 2-9: moving dust in a fast bipolar outflow.
    Using optical images and spectra of the bipolar nebula M 2-9 we show that, in addition to the well-known bright inner nebula, the object has fast, highly...
  • Publication
    M1-46: A Case Study on Multiple-Shell Planetary Nebula Formation
    We discuss in detail the evolutionary path of the multiple-shell planetary nebula M1-46, in the light of our new observations. The velocities of the halo and...
  • Publication
    Mapping the physical and chemical properties of the planetary nebula NGC 3242
    We present optical integral field spectroscopy analysis of the main components, with the exception of the halo, as well as of the detected small-scale...
  • Publication
    Menzel 3: Dissecting the ant
    The structure and kinematics of the bipolar nebula Mz 3 have been investigated by means of HST, CTIO and ESO images and spectra. At least four distinct outflows...
  • Publication
    Merging of Elliptical Galaxies as a Possible Origin of the Intergalactic Stellar Population
    We present N-body simulations of elliptical galaxy encounters into dry mergers to study the resulting unbound intergalactic stellar population, in particular...