Results 21 to 30 of about 89,220 (323)
Neural Networks and the Classification of Active Galactic Nucleus Spectra [PDF]
Publications of the Astronomical Society of Australia, 1996 AbstractThe 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
openalex +4 more sources
NGC 4151 - A unified active galactic nucleus
, 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
openalex +4 more sources
The Fundamental Plane Evolution of Active Galactic Nucleus Host Galaxies [PDF]
The Astrophysical Journal, 2004 We measured the stellar velocity dispersions of 15 active galactic nucleus (AGN) host galaxies at redshifts as high as $\sim 0.34$. Combining these with published velocity dispersion measurements from the literature, we study the Fundamental Plane of AGN host galaxies and its evolution.
Jong‐Hak Woo +4 more
openalex +6 more sources
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
openaire +7 more sources
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
doaj +1 more source
Molecular emission in the active galactic nucleus of NGC 1068 [PDF]
Proceedings of the International Astronomical Union, 2004 E. Galliano, D. Alloin
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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
openaire +2 more sources
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.
T. W. B. Muxlow +3 more
openaire +3 more sources
Core-collapse Supernova Explosions in Active Galactic Nucleus Accretion Disks
The Astrophysical Journal, 2023 Astrophysical events that occur in active galactic nucleus (AGN) disks are believed to differ significantly from the ordinary in the interstellar medium.
Fu-Lin Li +6 more
doaj +1 more source
Aligning nuclear cluster orbits with an active galactic nucleus accretion disc [PDF]
, 2020 Active galactic nuclei (AGN) are powered by the accretion of disks of gas onto supermassive black holes (SMBHs). Stars and stellar remnants orbiting the SMBH in the nuclear star cluster (NSC) will interact with the AGN disk. Orbiters plunging through the
Gaia Fabj +5 more
semanticscholar +1 more source