The Outflow Impact on the Size of the Narrow-line Region among Type 2 Active Galactic Nuclei
We present a study of the gas kinematics in narrow-line regions (NLRs) of 2009 Type 2 active galactic nuclei (AGNs) at z < 0.34. We construct [O iii ] λ 5007 emission-line images using publicly available broadband images from the Sloan Digital Sky Survey (SDSS). The [O iii ] emission areas of the...
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2025-01-01
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| author | Kantapon Jensangjun Suraphong Yuma |
| author_facet | Kantapon Jensangjun Suraphong Yuma |
| author_sort | Kantapon Jensangjun |
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| description | We present a study of the gas kinematics in narrow-line regions (NLRs) of 2009 Type 2 active galactic nuclei (AGNs) at z < 0.34. We construct [O iii ] λ 5007 emission-line images using publicly available broadband images from the Sloan Digital Sky Survey (SDSS). The [O iii ] emission areas of the samples, measured down to a rest-frame isophote of 1.4 × 10 ^−15 erg s ^−1 cm ^−2 arcsec ^−2 , range from 3.7 up to 224 kpc ^2 . With our broadband technique, we found a correlation between [O iii ] area and AGN luminosity inferred from the [O iii ] luminosity and the mid-infrared luminosity at rest-frame 15 μ m. The isophotal threshold used to determine the [O iii ] area affects the correlation strength in that a brighter isophote yields a stronger correlation between the [O iii ] area and AGN luminosity. The presence of gas outflows is examined by the ratio of the [O iii ] velocity dispersion to the stellar velocity dispersion ( σ _[O _iii _] / σ _⋆ > 1.4) using SDSS spectra. At a given luminosity, objects with and without outflows exhibit the same extent of [O iii ] emission. Their correlation between [O iii ] area and luminosity is almost identical. It is suggested that the size of NLRs is not affected by outflow mechanisms but rather by photoionization from the central AGNs. |
| format | Article |
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| language | English |
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| spelling | doaj-art-68d055d7a1e747cf93603a69fec84e7f2025-08-20T03:11:14ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-0198617910.3847/1538-4357/add411The Outflow Impact on the Size of the Narrow-line Region among Type 2 Active Galactic NucleiKantapon Jensangjun0https://orcid.org/0009-0003-8182-1539Suraphong Yuma1https://orcid.org/0000-0002-0269-0135Department of Physics, Faculty of Science, Mahidol University , Bangkok 10400, Thailand ; suraphong.yum@mahidol.eduDepartment of Physics, Faculty of Science, Mahidol University , Bangkok 10400, Thailand ; suraphong.yum@mahidol.eduWe present a study of the gas kinematics in narrow-line regions (NLRs) of 2009 Type 2 active galactic nuclei (AGNs) at z < 0.34. We construct [O iii ] λ 5007 emission-line images using publicly available broadband images from the Sloan Digital Sky Survey (SDSS). The [O iii ] emission areas of the samples, measured down to a rest-frame isophote of 1.4 × 10 ^−15 erg s ^−1 cm ^−2 arcsec ^−2 , range from 3.7 up to 224 kpc ^2 . With our broadband technique, we found a correlation between [O iii ] area and AGN luminosity inferred from the [O iii ] luminosity and the mid-infrared luminosity at rest-frame 15 μ m. The isophotal threshold used to determine the [O iii ] area affects the correlation strength in that a brighter isophote yields a stronger correlation between the [O iii ] area and AGN luminosity. The presence of gas outflows is examined by the ratio of the [O iii ] velocity dispersion to the stellar velocity dispersion ( σ _[O _iii _] / σ _⋆ > 1.4) using SDSS spectra. At a given luminosity, objects with and without outflows exhibit the same extent of [O iii ] emission. Their correlation between [O iii ] area and luminosity is almost identical. It is suggested that the size of NLRs is not affected by outflow mechanisms but rather by photoionization from the central AGNs.https://doi.org/10.3847/1538-4357/add411Active galactic nucleiAGN host galaxiesGalaxy evolutionGalaxy quenchingGalaxy kinematics |
| spellingShingle | Kantapon Jensangjun Suraphong Yuma The Outflow Impact on the Size of the Narrow-line Region among Type 2 Active Galactic Nuclei The Astrophysical Journal Active galactic nuclei AGN host galaxies Galaxy evolution Galaxy quenching Galaxy kinematics |
| title | The Outflow Impact on the Size of the Narrow-line Region among Type 2 Active Galactic Nuclei |
| title_full | The Outflow Impact on the Size of the Narrow-line Region among Type 2 Active Galactic Nuclei |
| title_fullStr | The Outflow Impact on the Size of the Narrow-line Region among Type 2 Active Galactic Nuclei |
| title_full_unstemmed | The Outflow Impact on the Size of the Narrow-line Region among Type 2 Active Galactic Nuclei |
| title_short | The Outflow Impact on the Size of the Narrow-line Region among Type 2 Active Galactic Nuclei |
| title_sort | outflow impact on the size of the narrow line region among type 2 active galactic nuclei |
| topic | Active galactic nuclei AGN host galaxies Galaxy evolution Galaxy quenching Galaxy kinematics |
| url | https://doi.org/10.3847/1538-4357/add411 |
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