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C/O and N/O ratios in planetary nebulae with [WC] central stars

Bibcode
2014apn6.confE..27G
García-Rojas, J.; Peña, M.; Delgado-Inglada, G.; García-Hernández, D. A.; Morisset, C.
Bibliographical reference

Asymmetrical Planetary Nebulae VI conference, Proceedings of the conference held 4-8 November, 2013. Edited by C. Morisset, G. Delgado-Inglada and S. Torres-Peimbert. Online at http://www.astroscu.unam.mx/apn6/PROCEEDINGS/, id. #27

Advertised on:
4
2014
Number of authors
5
IAC number of authors
2
Citations
0
Refereed citations
0
Description
Planetary nebulae (PNe) around [WR] central stars (WRPNe) constitute a particular photoionized nebula class, representing about 10-15% of the PNe with known progenitor. We have studied 14 of them, detecting a large number of optical recombination lines (ORLs) from different ions of O and C (O+, O++, C++, C+3). This allows us to determine the C/O ratio, which is of paramount importance to constraint stellar evolution models. We have compared the obtained N/O and C/O ratios obtained with those derived from stellar evolution models, and we estimate that about half of our PNe have progenitors with initial masses similar to or larger than 4 Msun . These results are consistent with the results obtained from an independent analysis by Górny & García-Hernández (2014).
Type
Non-refereed
Planetary nebulae

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