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Galaxies 2018, 6(4), 110; https://doi.org/10.3390/galaxies6040110

Close Binaries and the Abundance Discrepancy Problem in Planetary Nebulae

1
Department of Physics and Astronomy, University College London, Gower St, London WC1E 6BT, UK
2
European Southern Observatory, Alonso de Córdova 3107, Casilla, Santiago 19001, Chile
3
Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain
4
Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain
5
European Southern Observatory, Karl-Schwarzschild-Str. 2, 85738 Garching bei München, Germany
6
Gran Telescopio Canarias S.A., c/ Cuesta de San José s/n, Breña Baja, E-38712 Santa Cruz de Tenerife, Spain
*
Author to whom correspondence should be addressed.
Received: 27 July 2018 / Revised: 12 October 2018 / Accepted: 15 October 2018 / Published: 19 October 2018
(This article belongs to the Special Issue Asymmetric Planetary Nebulae VII)
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Abstract

Motivated by the recent establishment of a connection between central star binarity and extreme abundance discrepancies in planetary nebulae, we have carried out a spectroscopic survey targeting planetary nebula with binary central stars and previously unmeasured recombination line abundances. We have discovered seven new extreme abundance discrepancies, confirming that binarity is key to understanding the abundance discrepancy problem. Analysis of all 15 objects with a binary central star and a measured abundance discrepancy suggests a cut-off period of about 1.15 days, below which extreme abundance discrepancies are found. View Full-Text
Keywords: planetary nebulae; binarity; abundances; stellar evolution planetary nebulae; binarity; abundances; stellar evolution
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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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Wesson, R.; Jones, D.; García-Rojas, J.; Boffin, H.M.J.; Corradi, R.L.M. Close Binaries and the Abundance Discrepancy Problem in Planetary Nebulae. Galaxies 2018, 6, 110.

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