Astrophysical: Planetary nebulae

  • Publication
    Kinematic study of planetary nebulae in NGC 6822
    Context. The kinematics of planetary nebulae in external galaxies and in our own is a clue for understanding the behavior of the low- and intermediate-mass...
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    Kinematical Analysis of a Sample of Bipolar Planetary Nebulae
    We present the kinematics of a sample of bipolar planetary nebulae (PNs) which cover a wide range of observed morphologies and collimation degrees, from bipolar...
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    Kinematical analysis of the galactic planetary nebulae M1-32
    It is found that the planetary nebula M1-32, which has a [WC4-5] core, shows a peculiar kinematics with bipolar outflows reaching ±200 km/s, while the main body...
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    Knots in the Outer Shells of the Planetary Nebulae IC 2553 and NGC 5882
    We present images and high-resolution spectra of the planetary nebulae IC 2553 and NGC 5882. Spatiokinematic modeling of the nebulae shows that they are...
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    Lessons from the ionised and molecular mass of post-CE PNe
    Close binary evolution is widely invoked to explain the formation of axisymmetric planetary nebulae, after a brief common envelope phase. The evolution of the...
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    Local Group Galaxies: Abundances in NGC 3109
    We present preliminary results of VLT spectroscopy follow-up of Planetary Nebulae (PNe) and HII regions in the dwarf Irregular galaxy NGC 3109. In total we have...
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    Low-ionization pairs of knots in planetary nebulae: physical properties and excitation
    We obtained optical long-slit spectra of four planetary nebulae (PNe) with low-ionization pair of knots, namely He 1-1, IC 2149, KjPn 8 and NGC 7662. These data...
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    Low-Ionization Structures in Planetary Nebulae: Confronting Models with Observations
    Around 50 planetary nebulae (PNs) are presently known to possess ``small-scale'' low-ionization structures (LISs) located inside or outside their main nebular...
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    Low-mass companions to Bright Giants
    Asymmetric Planetary Nebulae (APN) are formed by bipolar outflows through various mechanism like fast rotation (Blackman et al. 2001), magnetic field (Regos &...