García-Rojas, J;
Corradi, RLM;
Boffin, HMJ;
Monteiro, H;
Jones, D;
Wesson, R;
Cabrera-Lavers, A;
(2016)
Imaging the elusive H-poor gas in planetary nebulae with large abundance discrepancy factors.
In: Liu, X and Stanghellini, L and Karakas, A, (eds.)
Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution (Issue S323).
(pp. pp. 65-69).
Cambridge University Press
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Abstract
The discrepancy between abundances computed using optical recombination lines (ORLs) and collisionally excited lines (CELs) is a major, unresolved problem with significant implications for the determination of chemical abundances throughout the Universe. In planetary nebulae (PNe), the most common explanation for the discrepancy is that two different gas phases coexist: a hot component with standard metallicity, and a much colder plasma enhanced in heavy elements. This dual nature is not predicted by mass loss theories, and direct observational support for it is still weak. In this work, we present our recent findings that demonstrate that the largest abundance discrepancies are associated with close binary central stars. OSIRIS-GTC tunable filter imaging of the faint O II ORLs and MUSE-VLT deep 2D spectrophotometry confirm that O II ORL emission is more centrally concentrated than that of [O III] CELs and, therefore, that the abundance discrepancy may be closely linked to binary evolution.
| Type: | Proceedings paper |
|---|---|
| Title: | Imaging the elusive H-poor gas in planetary nebulae with large abundance discrepancy factors |
| Event: | International Astronomical Union Symposia no. 323, 10-14 October 2016, Beijing, China |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1017/S1743921317000849 |
| Publisher version: | https://doi.org/10.1017/S1743921317000849 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | binaries: close; ISM: abundances; (ISM:) planetary nebulae: general; stars: winds outflows |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1530468 |
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