PNE AS OBSERVATIONAL CONSTRAINTS IN CHEMICAL EVOLUTION MODELS FOR NGC 6822
We present chemical evolution models for the dwarf irregular galaxy NGC6822, using as observational constraints chemical abundances of planetary nebulae (PNe) and HII regions derived from both, collisionally excited lines (CELs) and recombination lines (RLs) methods. We built two models that reprodu...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2011 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57121297086 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=57121297086 |
| Access Level: | acceso abierto |
| Palabra clave: | Física, Astronomía y Matemáticas general Galaxies galaxies evolution HII regions |
| Sumario: | We present chemical evolution models for the dwarf irregular galaxy NGC6822, using as observational constraints chemical abundances of planetary nebulae (PNe) and HII regions derived from both, collisionally excited lines (CELs) and recombination lines (RLs) methods. We built two models that reproduce gaseous mass and the O/H derived for those two methods in order to discriminate between abundances obtained by CELs and by RLs. Both models produce a fair agreement with observations, but the predicted AY/AZ value for the RLs model is in better agreement with those values observed in Irr galaxies. |
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