• Publicación
    IRAS 17423-1755 (Hen 3-1475) Revisited: An O-rich High-mass Post-asymptotic Giant Branch Star
    The high-resolution (R ~ 600) Spitzer/IRS spectrum of the bipolar protoplanetary nebula (PN) IRAS 17423-1755 is presented in order to clarify the dominant...
  • Publicación
    IRAS 17423-1755: A BQ() star with a variable velocity outflow
    Infrared Astronomy Satellite (IRAS) 17423-1755 has been identified as a BQ() star. Its more remarkable observed features are large radial velocities, huge line...
  • Publicación
    IRAS 17423-1755: a massive post-AGB star evolving into the planetary nebula stage?
    IRAS 17423-1755 has been recognized as a new bipolar nebula during a multi-wavelength observational program of unidentified IRAS sources with far infrared...
  • Publicación
    IRAS 22568 + 6141 - A new bipolar planetary nebula
    The identification of a bipolar planetary nebula is reported with a description of its characteristics. The nebula IRAS 22568 + 6141 has an extension of 8...
  • Publicación
    IRAS 22568+6141: a new bipolar nebula.
    Not Available
  • Publicación
    Iron Depletion in Ionized Nebulae of the Large Magellanic Cloud
    We present here preliminary results of an analysis of the iron abundance in the ionized gas of three planetary nebulae and one H II region of the Large...
  • Publicación
    Is the nitrogen-rich source PN K4-47 a true planetary nebula?
    Context. The object K4-47 is a young planetary nebula that exhibits low-ionisation structures in the form of two 'lobes'. The unusual chemistry of the nebula...
  • Publicación
    JAM 1: Discovery of a New Candidate Evolved Planetary Nebula in Deep [O III] and Hα Imaging
    We report the discovery of a previously uncatalogued extended emission nebula, hereafter JAM 1, detected in ultra-deep [O III] and Hα narrowband imaging...
  • Publicación
    Jets, Knots, and Tails in Planetary Nebulae: NGC 3918, K1-2, and Wray 17-1
    We analyze optical images and high-resolution, long-slit spectra of three planetary nebulae that possess collimated, low-ionization features. NGC 3918 is...