Results 11 to 20 of about 89,220 (323)
Extreme variability in an active galactic nucleus: Gaia16aax [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 We present the results of a multiwavelength follow-up campaign for the luminous nuclear transient Gaia16aax, which was first identified in 2016 January.
G. Cannizzaro +14 more
semanticscholar +9 more sources
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).
S. Davis, Alexander Tchekhovskoy
semanticscholar +5 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.
A. Baczko +6 more
semanticscholar +5 more sources
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.
A. F. Bliss +10 more
core +5 more sources
An Active Galactic Nucleus Caught in the Act of Turning Off and On [PDF]
The Astrophysical Journal, 2017 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 ...
J. Comerford +7 more
semanticscholar +7 more sources
Active galactic nucleus outflows in galaxy discs [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 Galactic outflows, driven by active galactic nuclei (AGN), play a crucial role in galaxy formation and in the self-regulated growth of supermassive black holes (BHs).
T. Hartwig, M. Volonteri, G. Dashyan
semanticscholar +6 more sources
Discovery of a dual active galactic nucleus with ∼8 kpc separation [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2017 Targeted searches for dual active galactic nuclei (AGN), with separations 1 -- 10 kpc, have yielded relatively few successes. A recent pilot survey by Satyapal et al.
S. Ellison +4 more
semanticscholar +5 more sources
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.
B. D. Simmons +3 more
core +3 more sources
Chandra unveils a binary Active Galactic Nucleus in Mrk463 [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 ...
Alonso-Herrero +45 more
core +4 more sources
The fast UV variability of the active galactic nucleus in Fairall 9 [PDF]
The Astrophysical Journal, 2014 We present results from a new optical/UV/X-ray monitoring campaign of the luminous Seyfert galaxy Fairall 9 using the Swift satellite. Using the UV-Optical Telescope (UVOT) on Swift, we find correlated optical/UV variability on all time scales ranging ...
Lohfink, Anne +4 more
core +4 more sources