Results 21 to 30 of about 1,822 (227)
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
openaire +2 more sources
Active galactic nucleus outflows in galaxy discs [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 22 pages, 22 figures, published in ...
Hartwig, Tilman +2 more
openaire +4 more sources
An Active Galactic Nucleus Identification for 3EG J2006−2321
The Astrophysical Journal, 2002 We present a multiwavelength analysis of the high-energy gamma-ray source 3EG J2006-2321 (l = 1882, b = -2626). The flux of this source above 100 MeV is shown to be variable on timescales of days and months. Optical observations and careful examination of archived radio data indicate that its most probable identification is with PMN J2005-2310, a flat ...
Paul Wallace +3 more
openalex +3 more sources
An Active Galactic Nucleus Caught in the Act of Turning Off and On [PDF]
The Astrophysical Journal, 2017 Abstract 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 interaction with the companion galaxy that is currently located 12.5 kpc ...
Julia M. Comerford +7 more
openaire +6 more sources
AN OFF-CENTERED ACTIVE GALACTIC NUCLEUS IN NGC 3115 [PDF]
The Astrophysical Journal, 2014 NGC 3115 is an S0 galaxy that has always been considered to have a pure absorption-line spectrum. Some recent studies have detected a compact radio-emitting nucleus in this object, coinciding with the photometric center and with a candidate for the X-ray nucleus. This is evidence of the existence of a low-luminosity active galactic nucleus (AGN) in the
R. B. Menezes +2 more
openaire +2 more sources
The Ionization Fraction in the Obscuring “Torus” of an Active Galactic Nucleus [PDF]
The Astrophysical Journal, 1998 In this paper, we report VLBA radio maps at three frequencies and an ASCA X-ray spectrum of the water megamaser galaxy NGC 2639, which is believed to contain an edge-on viewed accretion disk. The radio observations reveal a compact ($
M. Matsuoka +11 more
openaire +3 more sources
Probing the Heart of an Active Galactic Nucleus: NGC 1068 [PDF]
Symposium - International Astronomical Union, 2001 We present results from integral field spectroscopy of the narrow line region of NGC 1068, carried out with the MPE 3D near infrared imaging spectrometer. A map and velocity field of the [Fe II] fine structure line at 1.64μm is presented. The kinematics of the [Fe II] emission, which arises in partially ionized zones, shows red shifted emission in the ...
Tecza, Matthias +2 more
openaire +3 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. It thus provides an extreme test of AGN models.
Bliss, A. F. +4 more
openaire +4 more sources
Spectropolarimetry of the changing-look active galactic nucleus Mrk 1018 [PDF]
Astronomy & Astrophysics, 2020 We have obtained new spectropolarimetric observations at visible wavelengths of the changing-look active galactic nucleus (AGN) Mrk 1018. The AGN direct spectrum shows an extremely weak continuum with faint broad Hβ and Hα emission lines. Both lines can be fit with a single very broad emission line component of full width at half maximum FWHM ≃ 7200 km
Hutsemékers, D. +3 more
openaire +4 more sources
Enhanced Black Hole Mergers in Active Galactic Nucleus Disks due to Precession-induced Resonances
The Astrophysical Journal, 2023 Recent studies have shown that active galactic nucleus (AGN) disks can host sources of gravitational waves. Compact binaries can form and merge in AGN disks through their interactions with the gas and other compact objects in the disk.
Hareesh Gautham Bhaskar +2 more
doaj +1 more source