Astrophysical: Planetary nebulae

  • Publication
    The Chandra X-Ray Survey of Planetary Nebulae (CHANPLANS): Probing Binarity, Magnetic Fields, and Wind Collisions
    We present an overview of the initial results from the Chandra Planetary Nebula Survey (CHANPLANS), the first systematic (volume-limited) Chandra X-Ray...
  • Publication
    The Chemical Abundances of the Hydrogen-poor Planetary Nebulae A30 and A58
    We present new CCD narrowband images and spatially resolved intermediate-dispersion spectroscopy of the hydrogen-poor nebulae A30 and A58. These data have...
  • Publication
    The chemical composition of TS 01, the most oxygen-deficient planetary nebula. AGB nucleosynthesis in a metal-poor binary star
    The planetary nebula TS 01 (also called PN G 135.9+55.9 or SBS 1150+599A) with its record-holding low oxygen abundance and its double degenerate close binary...
  • 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...