Dual Role of Accretion Disk Winds as X-ray Obscurers and UV Line Absorbers in AGN
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arXiv
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| Autores principales: | , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866916209562222592 |
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| author | Fukumura, Keigo Mehdipour, Missagh Behar, Ehud Shrader, Chris Dadina, Mauro Kazanas, Demosthenes Marchesi, Stefano Tombesi, Francesco |
| author_facet | Fukumura, Keigo Mehdipour, Missagh Behar, Ehud Shrader, Chris Dadina, Mauro Kazanas, Demosthenes Marchesi, Stefano Tombesi, Francesco |
| contents | X-ray obscuration of active galactic nuclei (AGNs) is considered in the context of ionized winds of stratified structure launched from accretion disks. We argue that a Compton-thick layer of a large-scale disk wind can obscure continuum X-rays and also lead to broad UV absorption such as in the blue wing of Civ; the former originates from the inner wind while the latter from the outer wind as a dual role. Motivated by a number of observational evidence showing strong AGN obscuration phenomena in Seyfert 1 AGNs such as NGC 5548, we demonstrate in this work, by utilizing a physically-motivated wind model coupled to post-process radiative transfer calculations, that an extended disk wind under certain physical conditions (e.g. morphology and density) could naturally cause a sufficient obscuration qualitatively consistent with UV/X-ray observations. Predicted UV/X-ray correlation is also presented as a consequence of variable spatial size of the wind in this scenario. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_07086 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dual Role of Accretion Disk Winds as X-ray Obscurers and UV Line Absorbers in AGN Fukumura, Keigo Mehdipour, Missagh Behar, Ehud Shrader, Chris Dadina, Mauro Kazanas, Demosthenes Marchesi, Stefano Tombesi, Francesco High Energy Astrophysical Phenomena X-ray obscuration of active galactic nuclei (AGNs) is considered in the context of ionized winds of stratified structure launched from accretion disks. We argue that a Compton-thick layer of a large-scale disk wind can obscure continuum X-rays and also lead to broad UV absorption such as in the blue wing of Civ; the former originates from the inner wind while the latter from the outer wind as a dual role. Motivated by a number of observational evidence showing strong AGN obscuration phenomena in Seyfert 1 AGNs such as NGC 5548, we demonstrate in this work, by utilizing a physically-motivated wind model coupled to post-process radiative transfer calculations, that an extended disk wind under certain physical conditions (e.g. morphology and density) could naturally cause a sufficient obscuration qualitatively consistent with UV/X-ray observations. Predicted UV/X-ray correlation is also presented as a consequence of variable spatial size of the wind in this scenario. |
| title | Dual Role of Accretion Disk Winds as X-ray Obscurers and UV Line Absorbers in AGN |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2403.07086 |