Reverberation mapping of active galactic nuclei: From X-ray corona to dusty torus

The central engines of active galactic nuclei (AGNs) are powered by accreting supermassive black holes, and while AGNs are known to play an important role in galaxy evolution, the key physical processes occur on scales that are too small to be resolved spatially (aside from a few exceptional cases)....

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Vydáno v:iScience Ročník 24; číslo 6; s. 102557
Hlavní autoři: Cackett, Edward M., Bentz, Misty C., Kara, Erin
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier Inc 25.06.2021
Elsevier
Témata:
Astrophysics methods
Extragalactic astrophysics
Observational astronomy
Review
Observational astronomy
Astrophysics methods
Extragalactic astrophysics
ISSN:2589-0042, 2589-0042
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Shrnutí:The central engines of active galactic nuclei (AGNs) are powered by accreting supermassive black holes, and while AGNs are known to play an important role in galaxy evolution, the key physical processes occur on scales that are too small to be resolved spatially (aside from a few exceptional cases). Reverberation mapping is a powerful technique that overcomes this limitation by using echoes of light to determine the geometry and kinematics of the central regions. Variable ionizing radiation from close to the black hole drives correlated variability in surrounding gas/dust but with a time delay due to the light travel time between the regions, allowing reverberation mapping to effectively replace spatial resolution with time resolution. Reverberation mapping is used to measure black hole masses and to probe the innermost X-ray emitting region, the UV/optical accretion disk, the broad emission line region, and the dusty torus. In this article, we provide an overview of the technique and its varied applications. [Display omitted] Observational astronomy; Extragalactic astrophysics; Astrophysics methods
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ISSN:2589-0042
2589-0042
DOI:10.1016/j.isci.2021.102557