Results 11 to 20 of about 264,441 (316)
Magnetohydrodynamics Simulations of Active Galactic Nucleus Disks and Jets [PDF]
Annual Review of Astronomy and Astrophysics, 2020 There is a broad consensus that accretion onto supermassive black holes and consequent jet formation power the observed emission from active galactic nuclei (AGNs). However, there has been less agreement about how jets form in accretion flows, their possible relationship to black hole spin, and how they interact with the surrounding medium.
Alexander Tchekhovskoy, Shane W. Davis
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Active galactic nucleus jet feedback in hydrostatic haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT Feedback driven by jets from active galactic nuclei is believed to be responsible for reducing cooling flows in cool-core galaxy clusters. We use simulations to model feedback from hydrodynamic jets in isolated haloes. While the jet propagation converges only after the diameter of the jet is well resolved, reliable predictions ...
Rainer Weinberger +10 more
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UNMASKING THE ACTIVE GALACTIC NUCLEUS IN PKS J2310-437 [PDF]
The Astrophysical Journal, 2009 PKS J2310-437 is an AGN with bright X-ray emission relative to its weak radio emission and optical continuum. It is believed that its jet lies far enough from the line of sight that it is not highly relativistically beamed. It thus provides an extreme test of AGN models.
Bliss, A. F. +4 more
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Chandraunveils a binary active galactic nucleus in Mrk 463 [PDF]
Monthly Notices of the Royal Astronomical Society, 2008 We analyse Chandra, XMM-Newton and HST data of the double-nucleus Ultraluminous Infrared Galaxy (ULIRG), Mrk463. The Chandra detection of two luminous ($\mathrm{L}_\mathrm{2-10 keV}=1.5\times10^{43}$ and $3.8\times10^{42}$ erg cm$^{-2}$ s$^{-1}$), unresolved nuclei in Mrk~463 indicates that this galaxy hosts a binary AGN, with a projected separation of
BIANCHI, STEFANO +4 more
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Changing-Look AGNs or Short-Lived Radio Sources? [PDF]
Frontiers in Astronomy and Space Sciences, 2017 The evolution of extragalactic radio sources has been a fundamental problem in the study of active galactic nuclei for many years. A standard evolutionary model has been created based on observations of a wide range of radio sources.
Aleksandra Wołowska +3 more
doaj +6 more sources
Asymmetric jet production in the active galactic nucleus of NGC 1052 [PDF]
Astronomy & Astrophysics, 2019 Context. Few active galactic nuclei (AGN) reveal double-sided jet systems. However, these systems are crucial to understand basic physical properties of extragalactic jets. Aims. We address the questions whether jets in AGN are symmetric in nature, how well they are collimated on small scales, and how they evolve with time. Methods.
Eduardo Ros +7 more
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The Accuracy of Morphological Decomposition of Active Galactic Nucleus Host Galaxies [PDF]
The Astrophysical Journal, 2008 In order to assess the accuracy with which we can determine the morphologies of AGN host galaxies, we have simulated more than 50,000 ACS images of galaxies with z < 1.25, using image and noise properties appropriate for the GOODS survey. We test the effect of central point-source brightness on host galaxy parameter recovery with a set of simulated ...
Simmons, B. D., Urry, C. M.
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Active galactic nucleus outflows in galaxy discs [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 22 pages, 22 figures, published in ...
Hartwig, Tilman +2 more
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An Active Galactic Nucleus Caught in the Act of Turning Off and On [PDF]
The Astrophysical Journal, 2017 Abstract We present the discovery of an active galactic nucleus (AGN) that is turning off and then on again in the z = 0.06 galaxy SDSS J1354+1327. This episodic nuclear activity is the result of discrete accretion events that could have been triggered by a past interaction with the companion galaxy that is currently located 12.5 kpc ...
Julia M. Comerford +7 more
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γ-Ray emission from Arp 220: indications of an active galactic nucleus [PDF]
, 2017 Extragalactic cosmic ray populations are important diagnostic tools for tracking the distribution of energy in nuclei and for distinguishing between activity powered by star formation versus active galactic nuclei (AGNs).
Tova M Yoast-Hull +3 more
semanticscholar +3 more sources