Results 1 to 10 of about 89,220 (323)
Ionizing Spotlight of Active Galactic Nucleus [PDF]
Galaxies, 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.
Alexei V. Moiseev +1 more
doaj +4 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
Blanton EL +4 more
europepmc +7 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
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
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
The Astrophysical Journal LettersRecent James Webb Space Telescope observations have revealed a population of compact extragalactic objects at z ≳ 4 with red near-infrared colors, which have been dubbed as “Little Red Dots” (LRDs).
Minghao Yue +5 more
doaj +2 more sources
A Transient “Changing-look” Active Galactic Nucleus Resolved on Month Timescales from First-year Sloan Digital Sky Survey V Data [PDF]
Astrophysical Journal Letters, 2022 We report the discovery of a new “changing-look” active galactic nucleus (CLAGN) event, in the quasar SDSS J162829.17+432948.5 at z = 0.2603, identified through repeat spectroscopy from the fifth Sloan Digital Sky Survey (SDSS-V).
Grisha Zeltyn +34 more
semanticscholar +1 more source
Orbital Evolution of Binary Black Holes in Active Galactic Nucleus Disks: A Disk Channel for Binary Black Hole Mergers? [PDF]
Astrophysical Journal, 2021 We perform a series of high-resolution 2D hydrodynamical simulations of equal-mass binary black holes (BBHs) embedded in active galactic nucleus (AGN) accretion disks to study whether these binaries can be driven to merger by the surrounding gas. We find
Ya-Ping Li +4 more
semanticscholar +1 more source
An energetic hot wind from the low-luminosity active galactic nucleus M81* [PDF]
Nature Astronomy, 2021 For most of their lifetime, super-massive black holes (SMBHs) commonly found in galactic nuclei obtain mass from the ambient medium at a rate well below the Eddington limit1, which is mediated by a radiatively inefficient, hot accretion flow2.
Fangzheng Shi +3 more
semanticscholar +1 more source
The Destruction and Recreation of the X-Ray Corona in a Changing-look Active Galactic Nucleus [PDF]
Astrophysical Journal, 2020 We present the drastic transformation of the X-ray properties of the active galactic nucleus (AGN) 1ES 1927+654, following a changing-look event. After the optical/ultraviolet outburst the power-law component, produced in the X-ray corona, disappeared ...
C. Ricci +18 more
semanticscholar +1 more source