Results 1 to 10 of about 497 (164)
The Spectral Energy Distributions of Low‐Luminosity Active Galactic Nuclei [PDF]
Astrophysical Journal, 1999 To appear in The Astrophysical Journal.
Luis C Ho
exaly +3 more sources
Soft gamma rays from low accreting supermassive black holes and connection to energetic neutrinos [PDF]
Nature Communications, 2021 The origins of the soft gamma-ray and high-energy neutrino backgrounds remain unknown. Here, the authors show radiatively inefficient accretion flows of low-luminosity active galactic nuclei can produce the soft gamma ray and high energy neutrino ...
Shigeo S. Kimura +2 more
doaj +2 more sources
Radio sources in low-luminosity active galactic nuclei [PDF]
Astronomy and Astrophysics, 2002 to appear in A& ...
N M Nagar, H Falcke, A S Wilson
exaly +3 more sources
THE LOW-LUMINOSITY END OF THE RADIUS-LUMINOSITY RELATIONSHIP FOR ACTIVE GALACTIC NUCLEI
Astrophysical Journal, 2013 We present an updated and revised analysis of the relationship between the Hbeta broad-line region (BLR) radius and the luminosity of the active galactic nucleus (AGN). Specifically, we have carried out two-dimensional surface brightness decompositions of the host galaxies of 9 new AGNs imaged with the Hubble Space Telescope Wide Field Camera 3.
Kelly D Denney +2 more
exaly +6 more sources
The Size of the Radio‐Emitting Region in Low‐Luminosity Active Galactic Nuclei
Astrophysical Journal, 2005 61 pages, 17 figures, 10 tables.
James M Anderson
exaly +3 more sources
ON THE DISAPPEARANCE OF THE BROAD-LINE REGION IN LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI
Astrophysical Journal, 2009 The disk-wind scenario for the broad-line region (BLR) and toroidal obscuration in active galactic nuclei (AGNs) predicts the disappearance of the BLR at low luminosities. In accordance with the model predictions, data from a nearly complete sample of nearby AGNs show that the BLR disappears at luminosities lower than 5 × 1039(M/107 M☉)2/3 ergs-1 ...
Moshe Elitzur, Luis C Ho
exaly +3 more sources
On the Unification of Low Luminosity Active Galactic Nuclei
International Journal For Multidisciplinary Research, 2023 We have used the distributions of observed radio properties of a subset of AGNs called low luminosity AGNs (LLAGNs) to investigate the relationship between radio-selected BL Lacs (RBLs and XBLs) and Fanaroff-Riley Type I radio galaxies (FRI) in accordance with the unified scheme. Analysis of the core and extended luminosity show that RBLs are more core
Godson Abbey - +5 more
openaire +1 more source
Low-luminosity radio-loud active galactic nuclei [PDF]
Proceedings of 8th European VLBI Network Symposium — PoS(8thEVN), 2007 I review observational properties of low power radio loud AGN. High resolution VLBI observations allow the estimate of the jet velocity and orientation with respect to the line of sight and the determination of the Doppler factor. These data reveal rich structures, including two-sided jets and secondary components. New results on 1144+35, a giant radio
Giovannini, Gabriele +1 more
openaire +3 more sources
The Astrophysical Journal, 2023 To understand the formation and growth of supermassive black holes (SMBHs) and their coevolution with host galaxies, it is essential to know the impact of environment on the activity of active galactic nuclei (AGNs).
Zhensong Hu +16 more
doaj +1 more source
NuSTAR Observes Two Bulgeless Galaxies: No Hard X-Ray AGN Detected in NGC 4178 or J0851+3926
The Astrophysical Journal, 2023 The discovery over the last several decades of low- and moderate-luminosity active galactic nuclei (AGNs) in disk-dominated galaxies—which show no “classical” bulges—suggests that secular mechanisms represent an important growth pathway for supermassive ...
Ryan W. Pfeifle +7 more
doaj +1 more source