Astrophysical: Planetary nebulae

  • Publication
    The chemical content of nearby galaxies from planetary nebulae: NGC 147
    We report the results of spectroscopic observations, obtained with the Gemini Multi-Object Spectrograph, of eight planetary nebulae (PNe) in the dwarf...
  • Publication
    The chemical structure of bipolar planetary nebulae. I. IC 4406.
    Long slit spectrophotometry of the bipolar planetary nebula IC 4406, in the range from 360 to 930nm, has been used to study the chemical structure along its...
  • Publication
    The chemical structure of bipolar planetary nebulae. II. 13 objects
    Long slit spectrophotometry of 13 bipolar planetary nebulae has been used to study their physical and chemical properties. In each nebula, one to seven...
  • Publication
    The chemistry of planetary nebulae and HII regions in the dwarf galaxies Sextans A and B from deep VLT spectra
    Spectroscopic observations obtained with the VLT of one planetary nebula (PN) in Sextans A and of five PNe in Sextans A and of several H ii regions in these two...
  • Publication
    The Chemistry of Planetary Nebulae in the Outer Regions of M31
    We present spectroscopy of nine planetary nebulae (PNe) in the outskirts of M31, all but one obtained with the 10.4 m GTC telescope. These sources extend our...
  • Publication
    The CO structure of NGC 7027 - A bipolar nebula in the making
    Intermediate resolution mapping and limited off-center spectroscopy of the post-main-sequence molecular outflow source NGC 7027 are presented. The CO envelope...
  • Publication
    The computation of interstellar extinction in photoionized nebulae
    Context. The proper plasma analysis practice (PPAP) method has been proposed to analyze spectroscopic data of ionized nebulae. The method is based on a coherent...
  • Publication
    The core-halo structure of IC 418
    Deep spectra of the planetary nebula IC 418 were obtained in the wavelength range 4190-5850 A. The data made it possible to map an extended halo about the...
  • Publication
    The Correlations between Planetary Nebula Morphology and Central Star Evolution: Analysis of the Northern Galactic Sample
    Northern Galactic planetary nebulae (PNs) are studied to disclose possible correlations between the morphology of the nebulae and the evolution of the central...