Results 1 to 10 of about 221,503 (255)
Ionizing spotlight of active galactic nucleus [PDF]
arXiv, 2023 Ionization cones and relativistic jets give us one of the most large-scale example of active galactic nuclei (AGN) influence on the surrounding gas environment in galaxies and beyond. The study of ionization cones makes it possible not only to test the predictions of the unified model of galactic activity, but also to probe galaxy gas environment and ...
Alexei V. Moiseev +1 more
arxiv +7 more sources
Neural Networks and the Classification of Active Galactic Nucleus Spectra [PDF]
Publications of the Astronomical Society of Australia, 1996 The use of Artificial Neural Networks (ANNs) as a classifier of digital spectra is investigated. Using both simulated and real data, it is shown that neural networks can be trained to discriminate between the spectra of different classes of active galactic nucleus (AGN) with realistic sample sizes and signal-to-noise ratios.
Daya M. Rawson +2 more
arxiv +6 more sources
NGC 4151 - A unified active galactic nucleus [PDF]
arXiv, 1996 We present a unified picture of active galactic nuclei which we construct from a detailed model of line emission in the active source in NGC 4151. In this scheme NGC 4151 can be regarded as a typical active nucleus, special only in its orientation. This alleviates a number of problems with a unified picture based on a dusty molecular torus with a fixed
I. Cassidy, Derek Raine
arxiv +5 more sources
Active galactic nucleus jet feedback in hydrostatic halos [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 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 halos.
R. Weinberger +10 more
semanticscholar +3 more sources
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 +8 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
Active galactic nucleus feedback in clusters of galaxies. [PDF]
Proc Natl Acad Sci U S A, 2010 Observations made during the last ten years with the Chandra X-ray Observatory have shed much light on the cooling gas in the centers of clusters of galaxies and the role of active galactic nucleus (AGN) heating. Cooling of the hot intracluster medium in cluster centers can feed the supermassive black holes found in the nuclei of the dominant cluster ...
Blanton EL +4 more
europepmc +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.
A. Baczko +6 more
semanticscholar +5 more sources
Active Galactic Nucleus Quenching in Simulated Dwarf Galaxies
The Astrophysical Journal, 2023 We examine the quenching characteristics of 328 isolated dwarf galaxies $\left({10}^{8}\lt {M}_{\mathrm{star}}/{M}_{\odot }\lt {10}^{10}\right)$ within the Romulus25 cosmological hydrodynamic simulation.
Ray S. Sharma +4 more
doaj +2 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 +9 more sources