Astrophysical: Planetary nebulae

  • Publication
    Modelling dust production in AGB stars
    Asymptotic giant branch (AGB) stars are among the most important gas and dust polluters of the Universe. The latest AGB evolutionary models take into account...
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    Molecular and low excitation emission in high mass post-main-sequence nebulae
    A broad range of type I post-main-sequence nebulae have been mapped and studied spectroscopically in the J = 1 - 0, J = 2 - 1, and J = 3 - 2 transitions of CO...
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    Molecular processes from the AGB to the PN stage
    Many complex organic molecules and inorganic solid-state compounds have been observed in the circumstellar shell of stars (both C-rich and O-rich) in the...
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    More Evidence for a Population of Intracluster Planetary Nebulae in the Virgo Cluster
    We surveyed a 50 arcmin 2 region in the Virgo cluster core to search for intergalactic planetary nebulae and found 11 candidates in the surveyed area. The...
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    Multi-level non-LTE calculations for very optically thick winds and photospheres under extreme NLTE conditions
    A new technique to calculate multilevel non-LTE continuum formation in the UV of stellar winds and plane-parallel, static stellar atmospheres is developed using...
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    Multiple collimated outflows in a planetary nebula?
    We present high resolution images and high dispersion spectra of the planetary nebula IC 4593. Benefiting from superb seeing (0″.4), the narrowband images...
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    Multiwavelength Imaging and Long-Slit Spectroscopy of the Planetary Nebula NGC 6884: The Discovery of a Fast Precessing, Bipolar Collimated Outflow
    We present Hα, [N II] lambda6583, [O III] lambda5007 ground-based images, Hubble Space Telescope (HST) (V band) archival images, VLA-A 3.6 cm continuum data...
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    MUSE crowded field 3D spectroscopy in NGC 300. I. First results from central fields
    Aims: As a new approach to the study of resolved stellar populations in nearby galaxies, our goal is to demonstrate with a pilot study in NGC 300 that integral...
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    MUSE spectroscopy of planetary nebulae with high abundance discrepancies
    We present MUSE deep integral-field unit spectroscopy of three planetary nebulae (PNe) with high-abundance discrepancy factors (ADF > 20): NGC 6778, M 1-42, and...