Temperature Discrepancy with Photoionization Models of the Narrow-Line Region
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2022
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| _version_ | 1876464871039565824 |
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| author | Luc Binette |
| author_facet | Luc Binette |
| contents | Temperature Discrepancy with Photoionization Models of the Narrow-Line Region Luc Binette Montserrat Villar Martín Gladis Magris C. Mariela Martínez-Paredes Alexandre Alarie Alberto Rodríguez Ardila Ilhuiyolitzin Villicaña-Pedraza Física, Astronomía y Matemáticas Dust plasmas extinction galaxies: Seyfert quasars: emission Lines Using published work on the narrow-line region of active galactic nuclei, a comparison is carried out among the O III λ4363Å/λ5007Å (ROIII) ratio observed in quasars, Seyfert 2's and the spatially resolved ENLR plasma. Using the weak Ar IV λ4711Å/λ4740Å doublet ratio observed by Koski (1978) among Seyfert 2's, we find evidence of a narrow-line region (NLR) populated by low density emission clouds (≲ 104 cm-3). After considering calculations of the Ar IV and O III ratios that assume a power law distribution of plasma densities, no evidence of collisional deexcitation is found. The plasma temperature inferred is 13 500 °K, which is problematic to reproduce with standard photoionization calculations. The simplest interpretation for the near coincidence of the ROIII ratios among the ENLR and Seyfert 2 measurements (ROIII ≃ 0:017) is that the low density regime applies to both plasmas. 2022 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57175492011 https://www.redalyc.org/journal/571/57175492011/ https://www.redalyc.org/journal/571/57175492011/html/ https://www.redalyc.org/journal/571/57175492011/57175492011.epub https://www.redalyc.org/journal/571/57175492011/movil 10.22201/ia.01851101p.2022.58.01.11 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) Num.1 Vol.58 |
| format | Artículo científico |
| id | redalyc_57175492011 |
| institution | Redalyc |
| language | en |
| publishDate | 2022 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Temperature Discrepancy with Photoionization Models of the Narrow-Line Region Luc Binette Física, Astronomía y Matemáticas Dust plasmas extinction galaxies: Seyfert quasars: emission Lines Temperature Discrepancy with Photoionization Models of the Narrow-Line Region Luc Binette Montserrat Villar Martín Gladis Magris C. Mariela Martínez-Paredes Alexandre Alarie Alberto Rodríguez Ardila Ilhuiyolitzin Villicaña-Pedraza Física, Astronomía y Matemáticas Dust plasmas extinction galaxies: Seyfert quasars: emission Lines Using published work on the narrow-line region of active galactic nuclei, a comparison is carried out among the O III λ4363Å/λ5007Å (ROIII) ratio observed in quasars, Seyfert 2's and the spatially resolved ENLR plasma. Using the weak Ar IV λ4711Å/λ4740Å doublet ratio observed by Koski (1978) among Seyfert 2's, we find evidence of a narrow-line region (NLR) populated by low density emission clouds (≲ 104 cm-3). After considering calculations of the Ar IV and O III ratios that assume a power law distribution of plasma densities, no evidence of collisional deexcitation is found. The plasma temperature inferred is 13 500 °K, which is problematic to reproduce with standard photoionization calculations. The simplest interpretation for the near coincidence of the ROIII ratios among the ENLR and Seyfert 2 measurements (ROIII ≃ 0:017) is that the low density regime applies to both plasmas. 2022 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57175492011 https://www.redalyc.org/journal/571/57175492011/ https://www.redalyc.org/journal/571/57175492011/html/ https://www.redalyc.org/journal/571/57175492011/57175492011.epub https://www.redalyc.org/journal/571/57175492011/movil 10.22201/ia.01851101p.2022.58.01.11 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) Num.1 Vol.58 |
| title | Temperature Discrepancy with Photoionization Models of the Narrow-Line Region |
| topic | Física, Astronomía y Matemáticas Dust plasmas extinction galaxies: Seyfert quasars: emission Lines |
| url | https://www.redalyc.org/articulo.oa?id=57175492011 https://www.redalyc.org/journal/571/57175492011/ https://www.redalyc.org/journal/571/57175492011/html/ https://www.redalyc.org/journal/571/57175492011/57175492011.epub https://www.redalyc.org/journal/571/57175492011/movil |