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Post-red-giant-branch Planetary Nebulae
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Common envelope events have been associated with the formation of a planetary nebulae since its proposition more than forty five years ago. However, until recently there have been doubts as to whether a common envelope while the donor is ascending the red giant branch, rather than the subsequent asymptotic red giant branch, would result in a planetary nebula. There is now strong theoretical and observational evidence to suggest that some planetary nebulae are, indeed, the products of common envelope phases which occurred while the nebular progenitor was on the red giant branch. The characterisation of these systems is challenging but has the potential to reveal much about the common envelope -- a critical evolutionary phase in the formation of a plethora of interesting astrophysical phenomena.
Forward citations
Cited by 3 Pith papers
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Central-star extinctions towards planetary nebulae
By fitting model spectra to central-star photometry, the paper produces a homogeneous E(B-V) extinction catalog for 162 extended planetary nebulae that agrees with interstellar dust maps, identifies new binaries, and ...
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Mass-feeding of jet-launching white dwarfs in grazing and common envelope evolution
White dwarfs entering a giant's envelope may grow a one-solar-radius accretion disk that launches jets powered by gravitational energy, explaining jet-shaped planetary nebulae and luminous red novae.
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The jet-feedback mechanism in common envelope evolution of planetary nebula progenitors
From 1D MESA simulations with spherically symmetric energy injection, the authors derive crude negative jet feedback coefficients chi_AGB ≈ 0.5 (M2/0.1 M_sun)^-1 and chi_RGB ≈ 0.8 (M2/0.1 M_sun)^-1.
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