Study of electron density in planetary nebulae
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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2002
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| _version_ | 1866814367445549056 |
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| author | H. O. Castañeda, |
| author_facet | H. O. Castañeda, |
| contents | Study of electron density in planetary nebulae H. O. Castañeda, B. C. Writzl M. V. F. Copetti Física, Astronomía y Matemáticas PLANETARY NEBULAE: GENERAL We present a comparison among electron density estimates for planetary nebulae based on di erent emission-lineratios. We have considered the density indicators [O II] 3729/3726, [S II] 6716/6731, [Cl III] 5517/5537,[Ar IV] 4711/4740, C III] 1906/1909 and [N I] 5202/5199. The observational data were extracted fromthe catalogue of Kaler et al. (1997). We veried that statistically Ne[Ar IV] < Ne[Cl III] > Ne[N I] Ne[O II] <Ne[S II], being these density sensors ordered by the ionization potentials of the parent ions. These di erencescan be attributed to errors on the atomic parameters used, to the adoption of a same electron temperature fordi erent ions and, what seems to be more probable, to internal variations of density in the studied nebulae. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57112043 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.12 |
| format | Artículo científico |
| id | redalyc_57112043 |
| language | en |
| publishDate | 2002 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Study of electron density in planetary nebulae H. O. Castañeda, Física, Astronomía y Matemáticas PLANETARY NEBULAE: GENERAL Study of electron density in planetary nebulae H. O. Castañeda, B. C. Writzl M. V. F. Copetti Física, Astronomía y Matemáticas PLANETARY NEBULAE: GENERAL We present a comparison among electron density estimates for planetary nebulae based on di erent emission-lineratios. We have considered the density indicators [O II] 3729/3726, [S II] 6716/6731, [Cl III] 5517/5537,[Ar IV] 4711/4740, C III] 1906/1909 and [N I] 5202/5199. The observational data were extracted fromthe catalogue of Kaler et al. (1997). We veried that statistically Ne[Ar IV] < Ne[Cl III] > Ne[N I] Ne[O II] <Ne[S II], being these density sensors ordered by the ionization potentials of the parent ions. These di erencescan be attributed to errors on the atomic parameters used, to the adoption of a same electron temperature fordi erent ions and, what seems to be more probable, to internal variations of density in the studied nebulae. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57112043 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.12 |
| title | Study of electron density in planetary nebulae |
| topic | Física, Astronomía y Matemáticas PLANETARY NEBULAE: GENERAL |
| url | https://www.redalyc.org/articulo.oa?id=57112043 |