The DOI matches its Crossref record; 50 of the 50 references it cites were found in a registry or an index.
Nuclear obscuration in active galactic nuclei
Open accessAbstract
The material surrounding accreting supermassive black holes connects the active galactic nucleus with its host galaxy and, besides being responsible for feeding the black hole, provides important information on the feedback that nuclear activity produces on the galaxy. In this Review, we summarize our current understanding of the close environment of accreting supermassive black holes obtained from studies of local active galactic nuclei carried out in the infrared and X-ray regimes. The structure of this circumnuclear material is complex, clumpy and dynamic, and its covering factor depends on the accretion properties of the active galactic nucleus. In the infrared, this obscuring material is a transition zone between the broad- and narrow-line regions, and, at least in some galaxies, it consists of two structures: an equatorial disk/torus and a polar component. In the X-ray regime, the obscuration is produced by multiple absorbers across various spatial scales, mostly associated with the torus and the broad-line region. In the coming decade, the new generation of infrared and X-ray facilities will greatly contribute to our understanding of the structure and physical properties of nuclear obscuration in active galactic nuclei. The material surrounding accreting supermassive black holes connects them with their hosts. From studies in the infrared and X-rays, the structure of this material is found to be complex, clumpy and dynamic.
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Cites
Unified Schemes for Radio-Loud Active Galactic Nuclei
Urry, C. M., & Padovani, P. (1995) · Publications of the Astronomical Society of the Pacific · doi:10.1086/133630 · Cited by 4,868
Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
Kormendy, J., & Ho, L. C. (2013) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-082708-101811 · Cited by 4,196
Unified Models for Active Galactic Nuclei and Quasars
Antonucci, R. (1993) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.aa.31.090193.002353 · Cited by 3,943
Croton, D. J., Springel, V., White, S. D. M., De Lucia, G., Frenk, C. S., Gao, L., Jenkins, A., Kauffmann, G., Navarro, J. F., & Yoshida, N. (2006) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2005.09675.x · Cited by 3,685
Energy input from quasars regulates the growth and activity of black holes and their host galaxies
Di Matteo, T., Springel, V., & Hernquist, L. (2005) · Nature · doi:10.1038/nature03335 · Cited by 3,353
The James Webb Space Telescope
Gardner, J. P., Mather, J. C., Clampin, M., Doyon, R., Greenhouse, M. A., Hammel, H. B., Hutchings, J. B., Jakobsen, P., Lilly, S. J., Long, K. S., et al. (2006) · Space Science Reviews · doi:10.1007/s11214-006-8315-7 · Cited by 1,978
Coevolution (Or Not) of Supermassive Black Holes and Host GalaxiesPreprint
Kormendy, J., & Ho, L. C. (2013) · Cited by 1,878
AGN Dusty Tori. II. Observational Implications of Clumpiness
Nenkova, M., Sirocky, M. M., Nikutta, R., Ivezić, Ž., & Elitzur, M. (2008) · The Astrophysical Journal · doi:10.1086/590483 · Cited by 811
Ueda, Y., Akiyama, M., Hasinger, G., Miyaji, T., & Watson, M. G. (2014) · The Astrophysical Journal · doi:10.1088/0004-637x/786/2/104 · Cited by 672
AGN Dusty Tori. I. Handling of Clumpy Media
Nenkova, M., Sirocky, M. M., Ivezić, Ž., & Elitzur, M. (2008) · The Astrophysical Journal · doi:10.1086/590482 · Cited by 603
Cited by
Giustini, M., & Proga, D. (2019) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201833810 · Cited by 166
“The circumnuclear absorbers are actually observed to be clumpy on all scales (Markowitz et al. 2014; Ramos Almeida & Ricci 2017), therefore there is still a non-null probability of observing the AGN central engine also in obscured, type 2 AGN, in case of occultation events caught on diverse scales,…”
BackgroundCosmological Simulations of Quasar Fueling to Subparsec Scales Using Lagrangian Hyper-refinement
Anglés-Alcázar, D., Quataert, E., Hopkins, P. F., Somerville, R. S., Hayward, C. C., Faucher-Giguère, C.-A., Bryan, G. L., Kereš, D., Hernquist, L., & Stone, J. M. (2021) · The Astrophysical Journal · doi:10.3847/1538-4357/ac09e8 · Cited by 118
What drives the growth of black holes: A decade of progress
Alexander, D. M., Hickox, R. C., Aird, J., Combes, F., Costa, T., Habouzit, M., Harrison, C. M., Leng, R. I., Morabito, L. K., Uckelman, S. L., et al. (2025) · New Astronomy Reviews · doi:10.1016/j.newar.2025.101733 · Cited by 18
Metadata
- Authors
- Almeida, C. R., & Ricci, C.
- Venue
- Nature Astronomy
- Published
- 2017-09-25
- Volume
- 1
- Issue
- 10
- Pages
- 679-689
- ISSN
- 2397-3366 (ISSN-L)
- OpenAlex
- W2751390542
- Cited by
- 305
- References
- 50
- FWCI
- 12.97
- Type
- journal article
- Language
- en
- Open access
- green
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