Results 11 to 20 of about 38,366 (276)
The Astrophysical JournalThe origin of the cool-core (CC) and non-cool-core (NCC) dichotomy of galaxy clusters remains uncertain. Previous simulations have found that cluster mergers are effective in destroying CCs but fail to prevent overcooling in cluster cores when radiative ...
Shuang-Shuang Chen +5 more
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THE GALACTIC CENTER: NOT AN ACTIVE GALACTIC NUCLEUS [PDF]
The Astrophysical Journal Supplement Series, 2013 AbstractWe present 10 μm – 35μm Spitzer spectra of the interstellar medium in the central molecular zone (CMZ), the central 210 pc × 60 pc of the Galactic center (GC). We present maps of the CMZ in ionic and H2 emission, covering a more extensive area than earlier spectroscopic surveys in this region.
An, Deokkeun +2 more
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Active galactic nucleus jet feedback in hydrostatic haloes
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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X-ray Insight into High-Energy Processes in Extreme Galactic Nuclear Environment
Universe, 2022 Nuclear regions of galaxies apparently play a disproportionately large role in regulating their formation and evolution. How this regulation works, however, remains very uncertain.
Q. Daniel Wang
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ACTIVE GALACTIC NUCLEUS HOST GALAXY MORPHOLOGIES IN COSMOS [PDF]
The Astrophysical Journal, 2009 We use Hubble Space Telescope/Advanced Camera for Surveys images and a photometric catalog of the Cosmic Evolution Survey (COSMOS) field to analyze morphologies of the host galaxies of ~400 active galactic nucleus (AGN) candidates at redshifts 0.3 < z < 1.0.
J. M. Gabor +16 more
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X-Ray Emission of Ultraviolet Variable Active Galactic Nucleus Candidates
The Astronomical Journal, 2023 We analyze the X-ray properties of a sample of 23 high-probability active galactic nucleus (AGN) candidates with ultraviolet variability identified in Wasleske et al.
Erik J. Wasleske, Vivienne F. Baldassare
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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.
Davis, Shane W., Tchekhovskoy, Alexander
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ULTRAFAST OUTFLOWS: GALAXY-SCALE ACTIVE GALACTIC NUCLEUS FEEDBACK [PDF]
The Astrophysical Journal, 2013 We show, using global 3D grid-based hydrodynamical simulations, that Ultra Fast Outflows (UFOs) from Active Galactic Nuclei (AGN) result in considerable feedback of energy and momentum into the interstellar medium (ISM) of the host galaxy. The AGN wind interacts strongly with the inhomogeneous, two-phase ISM consisting of dense clouds embedded in a ...
Wagner, A. Y. +2 more
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Active galactic nucleus feedback in NGC 3982
Astronomy & Astrophysics, 2022 The energetic feedback from supermassive black holes can influence star formation at the centres of galaxies. Observational evidence for active galactic nucleus (AGN) impact on star formation can be searched for in galaxies by combining ultraviolet imaging and optical integral field unit data. The ultraviolet flux directly traces recent star formation,
P. Joseph, K. George, K. T. Paul
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A possible active galactic nucleus in M82? [PDF]
New Astronomy Reviews, 1999 MERLIN and VLA observations of the galaxy M82 have detected a jet-like elongated radio continuum feature emanating from one of the compact sources, 44.01+59.6, embedded in the starburst. The proximity of this source to the dynamical centre of M82 led us to suspect that it could be a weak active nucleus rather than a supernova remnant.
K. A. Wills +3 more
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