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Galaxies 2018, 6(2), 58; https://doi.org/10.3390/galaxies6020058

Planets, Planetary Nebulae, and Intermediate Luminosity Optical Transients (ILOTs)

1
Department of Physics, Technion, Israel Institute of Technology, Haifa 32000, Israel
2
Guangdong Technion Israel Institute of Technology, Shantou 515069, China
Received: 16 April 2018 / Revised: 24 May 2018 / Accepted: 24 May 2018 / Published: 28 May 2018
(This article belongs to the Special Issue Asymmetric Planetary Nebulae VII)
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Abstract

I review some aspects related to the influence of planets on the evolution of stars before and beyond the main sequence. Some processes include the tidal destruction of a planet on to a very young main sequence star, on to a low-mass main sequence star, and on to a brown dwarf. This process releases gravitational energy that might be observed as a faint intermediate luminosity optical transient (ILOT) event. I then summarize the view that some elliptical planetary nebulae are shaped by planets. When the planet interacts with a low-mass, upper asymptotic giant branch (AGB) star, it both enhances the mass-loss rate and shapes the wind to form an elliptical planetary nebula, mainly by spinning up the envelope and by exciting waves in the envelope. If no interaction with a companion, stellar or substellar, takes place beyond the main sequence, the star is termed a Jsolated star, and its mass-loss rates on the giant branches are likely to be much lower than what is traditionally assumed. View Full-Text
Keywords: planetary systems; planetary nebulae; stars: binaries; stars: AGB and post-AGB; stars: variables: general planetary systems; planetary nebulae; stars: binaries; stars: AGB and post-AGB; stars: variables: general
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Soker, N. Planets, Planetary Nebulae, and Intermediate Luminosity Optical Transients (ILOTs). Galaxies 2018, 6, 58.

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