Close binary central stars and the abundance discrepancy - new extreme objects

Bibcode
2017IAUS..323...70W
DOI
10.1017/S1743921317001958
Wesson, R.; Jones, D.; García-Rojas, J.; Corradi, R. L. M.; Boffin, H. M. J.
Bibliographical reference

Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution, Proceedings of the International Astronomical Union, IAU Symposium, Volume 323, pp. 70-73

Advertised on:
10
2017
Number of authors
5
IAC number of authors
3
Citations
8
Refereed citations
4
Description
Recent work (Corradi et al. 2015; Jones et al. 2016) has shown that the phenomenon of extreme abundance discrepancies, where recombination line abundances exceed collisionally excited line abundances by factors of 10 or more, seem to be strongly associated with planetary nebulae with close binary central stars. To further investigate, we have obtained spectra of a sample of nebulae with known close binary central stars, using FORS2 on the VLT, and we have discovered several new extreme abundance discrepancy objects. We did not find any non-extreme discrepancies, suggesting that a very high fraction of nebulae with close binary central stars also have an extreme abundance discrepancy.
Type
Non-refereed
Planetary nebulae
Circumstellar matter

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