Astrophysical: Planetary nebulae

  • Publication
    Spectroscopy of 12 [WC] planetary nebulae (Garcia-Rojas+, 2012)
    We acquired spectra at Las Campanas Observatory with the 6.5-m telescope and the Magellan Inamori Kyocera (MIKE) spectrograph, covering a wavelength range from...
  • Publication
    Spectroscopy of planetary nebulae in M 33
    Spectroscopic observations of 48 emission-line objects of M 33 have been obtained with the multi-object, wide field, fibre spectrograph AF2/WYFFOS at the 4.2 m...
  • Publication
    Spectroscopy of six highly evolved Abell planetary nebulae
    We have undertaken visual spectroscopy of the highly evolved planetary nebulae (PNe) A8, A13, A62, A72, A78 and A83 over a wavelength range 4330 λ 6830Å. This...
  • Publication
    Spitzer Infrared Spectrograph Observations of Magellanic Cloud Planetary Nebulae: The Nature of Dust in Low-Metallicity Circumstellar Ejecta
    We present 5-40 μm spectroscopy of 41 planetary nebulae (PNe) in the Magellanic Clouds, observed with the Infrared Spectrograph on board the Spitzer Space...
  • Publication
    Spitzer IRS spectra of compact Galactic planetary nebulae: The link between dust, evolution, and metallicity
    A sample of ~150 compact Galactic PNe has been observed with the Spitzer/IRS spectrograph to characterize their dust properties. These PNe are likely to be at...
  • Publication
    Spitzer IRS Spectroscopy of High-Mass Precursors of Planetary Nebulae
    We present Spitzer IRS observations of a small sample of heavily obscured IRAS sources displaying both the infrared and OH maser emission characteristic of OH...
  • Publication
    Subarcsecond knots and filaments in the molecular hydrogen of the bipolar PN NGC 2346
    We present high spatial resolution (~60-90 milliarcseconds) images of the molecular hydrogen emission in the planetary nebula NGC 2346. Molecular hydrogen...
  • Publication
    Temperature fluctuations and the chemical composition of planetary nebulae of Type I.
    The authors present two new methods to determine the electron temperature based on the He I line intensities. The temperatures derived from these methods are...
  • Publication
    The "Príncipes de Asturias" nebula: a new quadrupolar planetary nebula from the IPHAS survey
    Context: .The Isaac Newton Telescope Photometric Hα Survey (IPHAS) is currently mapping the Northern Galactic plane reaching to r'=20 mag with typically...