The Helix Nebula is a low-density, stratified object with near-solar oxygen abundance (8.7), a ~1 dex sulfur deficit, and moderate helium/nitrogen enrichment placing it near the Type I boundary, with abundance variations attributed to ionization structure rather than chemical inhomogeneity.
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3 Pith papers cite this work, alongside 11 external citations. Polarity classification is still indexing.
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Morphological similarity between JWST images of planetary nebula PMR 1 and X-ray images of CCSN remnant RCW 103 indicates that two pairs of jets shaped RCW 103, supporting the jittering-jets explosion mechanism.
Morphological similarity between pipe features in PNe and CCSNRs and a jet simulation is used to argue that jets formed the pipes and to bolster the JJEM for core-collapse supernovae.
citing papers explorer
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SDSS-V LVM: Revealing the Physical and Chemical Structure of the Helix Nebula
The Helix Nebula is a low-density, stratified object with near-solar oxygen abundance (8.7), a ~1 dex sulfur deficit, and moderate helium/nitrogen enrichment placing it near the Type I boundary, with abundance variations attributed to ionization structure rather than chemical inhomogeneity.
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JWST observations of a planetary nebula support jet-driven explosion of core-collapse supernova remnant RCW 103
Morphological similarity between JWST images of planetary nebula PMR 1 and X-ray images of CCSN remnant RCW 103 indicates that two pairs of jets shaped RCW 103, supporting the jittering-jets explosion mechanism.
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The jet-shaped pipe morphology in planetary nebulae and core-collapse supernova remnants
Morphological similarity between pipe features in PNe and CCSNRs and a jet simulation is used to argue that jets formed the pipes and to bolster the JJEM for core-collapse supernovae.