Astrofísicas: Nebulosas planetarias

  • 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...
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    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...
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    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...
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    JHKL photometry of Hen 2-147 (Santander-Garcia+, 2007)
    Near-Infrared JHKL photometry of the symbiotic star Hen 2-147 between 1981 and 2005, monitored from the South African Astronomical Observatory (SAAO) at...
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    JWST imaging observations of the Ring Nebula
    We present JWST images of NGC 6720 (the Ring Nebula), covering wavelengths from 1.6 μm to 25 μm. The bright shell is strongly fragmented with some 20 000 dense...
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    JWST observations of the Ring Nebula (NGC 6720) – II. PAH emission
    Polycyclic aromatic hydrocarbons (PAHs) and carbonaceous dust have been observed in clumpy circumstellar environments, yet their formation and evolutionary...
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    JWST Observations of the Ring Nebula (NGC 6720). III. A Dusty Disk around Its Central Star
    The planetary nebula NGC 6720, also known as the "Ring Nebula," is one of the most iconic examples of nearby planetary nebulae whose morphologies present a...
  • Publicación
    JWST observations of the Ring Nebula (NGC 6720): I. Imaging of the rings, globules, and arcs
    We present JWST images of the well-known planetary nebula NGC 6720 (the Ring Nebula), covering wavelengths from 1.6 to 25 $\, \mu$m. The bright shell is...
  • Publicación
    JWST/MIRI Study of the Enigmatic Mid-infrared Rings in the Planetary Nebula NGC 1514
    While NGC 1514 is an elliptical, but complex, planetary nebula at optical wavelengths, it was discovered to have a pair of infrared-bright, axisymmetric rings...