Pequignot, D;
Amara, M;
Liu, XW;
Barlow, MJ;
Storey, PJ;
Morisset, C;
Torres-Peimbert, S;
(2002)
Photoionization models for planetary nebulae with inhomogeneous chemical composition.
Revista Mexicana de Astronomia y Astrofisica
, 12
pp. 142-143.
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Abstract
Considering the prototypical case of NGC 6153, it is shown that photoionization models comprising two components with different chemical compositions can account quantitatively for most of the spectral features of those planetary nebulae in which the optical recombination lines seem to indicate abundances much larger than the collisionally excited lines. Contrary to a common belief, the recombination lines then no longer reflect the average nebular abundances. In particular, fluctuations of composition within PNe may lead to overestimation of the helium abundance.
| Type: | Article |
|---|---|
| Title: | Photoionization models for planetary nebulae with inhomogeneous chemical composition |
| Location: | UNAM, INST ASTRONOMIA, MEXICO CITY, MEXICO |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | https://www.revistas.unam.mx/index.php/revmexaa |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, planetary nebulae : abundances, planetary nebulae : individual (NGC 6153) |
| 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-pp.ucl.ac.uk/id/eprint/10096025 |
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