Physical conditions derived from O II recombination lines in planetary nebulae and their implications

Bibcode
2014RMxAA..50..329P
Peimbert, A.; Peimbert, M.; Delgado-Inglada, G.; García-Rojas, J.; Peña, M.
Referencia bibliográfica

Revista Mexicana de Astronomía y Astrofísica Vol. 50, pp. 329-340 (2014)

Fecha de publicación:
10
2014
Número de autores
5
Número de autores del IAC
1
Número de citas
19
Número de citas referidas
13
Descripción
Based on high quality observations of multiplet V1 of O II and the NLTE atomic computations for O II we study the density and temperature of a sample of PNe. We find that, in general, the densities derived from recombination lines of O II are similar to the densities derived from forbidden lines. This implies that the signature for oxygen rich clumps of high density and low temperature is absent in most of the objects of our sample. Electron pressures derived from the hotter zones are similar or slightly larger than those derived from the colder zones, suggesting the presence of shock waves. The average temperatures and t^{2} values derived from H, He and O lines are similar and consistent with chemical homogeneity. These results suggest that the abundances of these objects are the ones derived from recombination lines.
Proyectos relacionados
Izquierda - Imagen RGB de la nebulosa de Orión y M43 obtenida filtros estrechos con la cámara WFC en el INT: H alfa (rojo), [S II] 6716+30 (verde), [O III] 5007 (azul). Derecha - Imagen en falso color de la nebulosa planetaria NGC 6778. En azul se ve la emisión en la línea de O II tomada con el filtro sintonizable azul del instrumento OSIRIS en el GTC; en verde imagen con el filtro estrecho de [O III] del Nordic Optical Telescope (NOT).
Física de Nebulosas Ionizadas

Este proyecto mantiene dos líneas principales de investigación activas: 1) Estudio de la estructura, condiciones físicas y composición química de las nebulosas ionizadas, tanto galácticas como extragalácticas, a través del análisis detallado y modelización de sus espectros. Investigación de los gradientes de composición química a lo largo del disco

Jorge
García Rojas
En ejecución
Tipo
Con árbitro
Nebulosas planetarias
Física estelar e interestelar (FEEI)
La Vía Láctea y el Grupo Local (MWLG)

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