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Shaping of Planetary Nebulae by Exoplanets

National University of Ireland Galway, University Rd, H91 TK33 Galway, Ireland
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Galaxies 2020, 8(2), 41; https://doi.org/10.3390/galaxies8020041
Received: 1 March 2020 / Revised: 30 April 2020 / Accepted: 7 May 2020 / Published: 14 May 2020
(This article belongs to the Special Issue Workplans II: Workshop for Planetary Nebula Observations)
(1) Background: We investigate the hypothesis that exoplanet engulfment can help explain the observed non-spherical planetary nebula population, as a complementary shaping mechanism to the binary hypothesis. The aim is to investigate the extent to which massive planets can explain the population of non-spherical planetary nebulae; (2) Methods: This research utilises a new tool to calculate the planet-fraction of planetary nebulae progenitor stars called simsplash; (3) Results: we conclude that ∼15–30% of non-spherical planetary nebulae around single stars will have a history in which they engulfed a massive planet on the AGB; and (4) Conclusions: Engulfment of massive exoplanets may contribute significantly to the formation of non-spherical planetary nebulae around single stars, yet appears to be insufficient to explain them all. View Full-Text
Keywords: planetary nebulae; planet engulfment; exoplanets planetary nebulae; planet engulfment; exoplanets
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Keaveney, N.; Boyle, L.; Redman, M. Shaping of Planetary Nebulae by Exoplanets. Galaxies 2020, 8, 41.

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