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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Universidad Nacional Autónoma de México
2001
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=57101013 |
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Sommario:
- O2+ Recombination abundances in planetary nebulae R. L. Kingsburgh M. H. Armour Física, Astronomía y Matemáticas ERAL ISM: ABUNDANCES PLANETARY NEBULAE: GEN We present O2+/H+ abundances derived from echelle spectroscopy of fourplanetary nebulae, NGC 6210, NGC 6826, Hu2{1, NGC 6543, from the forbidden,collisionally excited lines, and from the permitted recombination lines. We ndthat the ratio of the recombination line to collisional line abundances ranges fromessentially unity (1.2 for Hu 2{1) to 6.6, for an o set position of NGC 6826, andcorresponding t2 values range from 0.016 to 0.087. 2001 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57101013 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Vol.10