Astrophysical: Planetary nebulae

  • Publication
    The triple-shell structure and collimated outflows of the planetary nebula NGC 6891
    Narrow-band Hα and [Nii] images and high-dispersion spatially resolved echelle spectroscopy of the planetary nebula NGC 6891 are presented. These observations...
  • Publication
    The VST Photometric Hα Survey of the Southern Galactic Plane and Bulge (VPHAS+)
    The VST Photometric Hα Survey of the Southern Galactic Plane and Bulge (VPHAS+) is surveying the southern Milky Way in u, g, r, i and Hα at ˜1 arcsec angular...
  • Publication
    Three new young objects from the IRAS Point Source Catalogue
    Three new young objects have been found when carrying out a survey of IRAS sources with infrared colors like planetary nebulae, via low resolution spectroscopy...
  • Publication
    Towards a more complete sample of binary central stars of planetary nebulae with Gaia
    Context. Many if not most planetary nebulae (PNe) are now thought to be the outcome of binary evolutionary scenarios. However, only a few percent of the PNe in...
  • Publication
    Towards an improvement in the spectral description of central stars of planetary nebulae
    Context. There are more than 3000 known Galactic planetary nebulae, but only 492 central stars of Galactic planetary nebulae (CSPN) have known spectral types...
  • Publication
    Turbulent planetary nebulae around [WC]-type stars
    Through a high-resolution spectroscopic survey, we analyze the velocity field of 16 planetary nebulae with [WC]- or wels-type nuclei in comparison with 8...
  • Publication
    Ultraviolet and infrared monitoring of FG Sagittae during 1982-1989 - Evolutionary status
    Ultraviolet IUE spectra and infrared JHKL photometry of FG Sge obtained over the period 1982-1989 indicate that the cooling rate of the star observed until...
  • Publication
    Ultraviolet emission line imaging of planetary nebulae with GALEX
    GALEX (the Galaxy Evolution Explorer) has provided far-UV(1344-1786Å) and near-UV(1771-2831Å) imaging of several Planetary Nebulae (e.g., Bianchi et al. 2008...
  • Publication
    Understanding Galactic planetary nebulae with precise/reliable nebular abundances
    We compare recent precise/reliable nebular abundances - as derived from high-quality optical spectra and the most recent ICFs - in a sample of Galactic...