NEBULAR KINEMATICS OF PLANETARY NEBULAE AS TESTS OF POSSIBLE DIFFERENCES OF DISTRIBUTION OF PERMITTED AND FORBIDDEN EMISSION LINES
In gaseous nebulae the abundances of heavy elements derived from recombination lines are systematically higher than those derived from collisionally excited lines. The possible explanations to obtain compatible solutions are: either to attribute the difference to the presence of temperature inhomoge...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2009 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57115758012 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57115758012 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas H II regions planetary nebulae |
| Sumario: | In gaseous nebulae the abundances of heavy elements derived from recombination lines are systematically higher than those derived from collisionally excited lines. The possible explanations to obtain compatible solutions are: either to attribute the difference to the presence of temperature inhomogeneities or to the presence of dense clumps of colder enriched material. We have obtained long slit echelle spectrograms in several planetary nebulae to try to shed light on this topic. We present preliminary results for NGC 6543. |
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