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Galaxies 2018, 6(3), 85; https://doi.org/10.3390/galaxies6030085

Surveying Planetary Nebulae Central Stars for Close Binaries: Constraining Evolution of Central Stars Based on Binary Parameters

Department of Physics & Astronomy, Valparaiso University, Valparaiso, IN 46383, USA
Received: 7 July 2018 / Revised: 2 August 2018 / Accepted: 3 August 2018 / Published: 6 August 2018
(This article belongs to the Special Issue Asymmetric Planetary Nebulae VII)
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Abstract

The increase in discovered close binary central stars of planetary nebulae is leading to a sufficiently large sample to begin to make broader conclusions about the effect of close binary stars on common envelope evolution and planetary nebula formation. Herein I review some of the recent results and conclusions specifically relating close binary central stars to nebular shaping, common envelope evolution off the red giant branch, and the total binary fraction and double degenerate fraction of central stars. Finally, I use parameters of known binary central stars to explore the relationship between the proto-planetary nebula and planetary nebula stages, demonstrating that the known proto-planetary nebulae are not the precursors of planetary nebulae with close binary central stars. View Full-Text
Keywords: planetary nebulae; stars: binaries; central stars of planetary nebulae; proto-planetary nebulae planetary nebulae; stars: binaries; central stars of planetary nebulae; proto-planetary nebulae
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Hillwig, T. Surveying Planetary Nebulae Central Stars for Close Binaries: Constraining Evolution of Central Stars Based on Binary Parameters. Galaxies 2018, 6, 85.

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