Centrally Concentrated X-Ray Radiation from an Extended Accreting Corona in Active Galactic Nuclei

• Published in: The Astrophysical journal Vol. 847; no. 2; pp. 96 - 103
• Main Authors: Liu, B. F., Taam, Ronald E., Qiao, Erlin, Yuan, Weimin
• Format: Journal Article
• Language: English
• Published: Philadelphia The American Astronomical Society 01.10.2017; IOP Publishing
• Subjects: ACCRETION DISKS; accretion, accretion disks; Active galactic nuclei; Astrophysics; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; black hole physics; BLACK HOLES; COMPARATIVE EVALUATIONS; Corona; Electron energy; ELECTRON TEMPERATURE; ELECTRON-POSITRON INTERACTIONS; EMISSION; FORECASTING; galaxies: active; galaxies: nuclei; GALAXY NUCLEI; HARD X RADIATION; Interstellar matter; Interstellar medium; INTERSTELLAR SPACE; MASS; Mathematical models; PAIR PRODUCTION; Parameters; Predictions; Radiation; SCHWARZSCHILD RADIUS; STELLAR WINDS; THERMAL CONDUCTION; X-ray emissions; X-RAY GALAXIES; X-rays: galaxies

The X-ray emission from bright active galactic nuclei (AGNs) is believed to originate in a hot corona lying above a cold, geometrically thin accretion disk. A highly concentrated corona located within ∼10 gravitational radii above the black hole is inferred from observations. Based on the accretion...