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| Format: | Artículo científico |
| Language: | en |
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Universidad Nacional Autónoma de México
2007
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| Online Access: | https://www.redalyc.org/articulo.oa?id=57102921 |
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| _version_ | 1866814372813209600 |
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| author | M. Peña |
| author_facet | M. Peña |
| contents | Using the VLT to analyze the compact photoionized regions in NGC 3109 M. Peña M. G. Richer G. Stasinska Física, Astronomía y Matemáticas HII REGIONS PLANETARY NEBULAE GALAXIES: INDIVIDUAL (NGC 3109) From ESO VLT \on-band o-band" imaging of the dwarf irregular - late type spiral NGC3109, we have detected20 planetary nebula (PN) candidates and many compact HII regions all over the galaxy. PN candidates havebeen selected as stellar objects with no detectable (or very faint) stellar continuum. Further spectroscopy (withVLT FORS multi-object) in the 3700-6800 A range has confirmed the PN nature of several candidates. Most ofthe PNe appear as low excitation nebulae. Spectra were also acquired for several HII regions. For many objectsthe [O III] 4363 line, sensitive to electron temperature, was detected, allowing a trustworthy determination ofchemical abundances. Therefore a comparative analysis of chemical composition in both type of objects canbe performed. We find that the HII regions present very similar O/H abundances (in average 12 + log O/H =7.79 0.10), while O/H in PNe spreads in a larger range. Most of the PNe seem to be O-enriched. 2007 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57102921 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.29 |
| format | Artículo científico |
| id | redalyc_57102921 |
| language | en |
| publishDate | 2007 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Using the VLT to analyze the compact photoionized regions in NGC 3109 M. Peña Física, Astronomía y Matemáticas HII REGIONS PLANETARY NEBULAE GALAXIES: INDIVIDUAL (NGC 3109) Using the VLT to analyze the compact photoionized regions in NGC 3109 M. Peña M. G. Richer G. Stasinska Física, Astronomía y Matemáticas HII REGIONS PLANETARY NEBULAE GALAXIES: INDIVIDUAL (NGC 3109) From ESO VLT \on-band o-band" imaging of the dwarf irregular - late type spiral NGC3109, we have detected20 planetary nebula (PN) candidates and many compact HII regions all over the galaxy. PN candidates havebeen selected as stellar objects with no detectable (or very faint) stellar continuum. Further spectroscopy (withVLT FORS multi-object) in the 3700-6800 A range has confirmed the PN nature of several candidates. Most ofthe PNe appear as low excitation nebulae. Spectra were also acquired for several HII regions. For many objectsthe [O III] 4363 line, sensitive to electron temperature, was detected, allowing a trustworthy determination ofchemical abundances. Therefore a comparative analysis of chemical composition in both type of objects canbe performed. We find that the HII regions present very similar O/H abundances (in average 12 + log O/H =7.79 0.10), while O/H in PNe spreads in a larger range. Most of the PNe seem to be O-enriched. 2007 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57102921 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.29 |
| title | Using the VLT to analyze the compact photoionized regions in NGC 3109 |
| topic | Física, Astronomía y Matemáticas HII REGIONS PLANETARY NEBULAE GALAXIES: INDIVIDUAL (NGC 3109) |
| url | https://www.redalyc.org/articulo.oa?id=57102921 |