Results 21 to 30 of about 643 (219)
Probing The Central Engines Of Low-Luminosity Active Galactic Nuclei [PDF]
, 2013 I give a brief review of the observational properties of low-luminosity AGNs (LLAGNs). I outline some unresolved issues in the study of LLAGNs, emphasizing the uncertainties in the role of the truncated thin accretion disk, the dusty obscuring torus and the origin of high-energy radiation (X-rays and gamma-rays).
Rodrigo Nemmen
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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
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Study of Torus Structures in Low-luminosity Active Galactic Nuclei with Suzaku [PDF]
Proceedings of 10th INTEGRAL Workshop: A Synergistic View of the High-Energy Sky — PoS(Integral2014), 2015 T. Kawamuro
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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
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The Nuclear Infrared Emission of Low-Luminosity Active Galactic Nuclei
The Astronomical Journal, 2012 Accepted for publication in ...
Rachel Mason +11 more
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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
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The Clustering of Low‐Luminosity Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2006 Based on the Sloan Digital Sky Survey (SDSS) DR2 sample, we present a multiparameter analysis of the spatial clustering of nearby active galactic nuclei (AGNs). Estimates of the redshift-space two-point correlation function reveal that Seyferts are less clustered than normal galaxies, while LINERs' clustering amplitude (s0) is consistent with that of ...
Anca Constantin, Michael S. Vogeley
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The Low-Luminosity End of the Radius-Luminosity Relationship for Active Galactic Nuclei
The 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.
Misty C. Bentz +17 more
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Gamma-ray observations of low-luminosity active galactic nuclei [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACTThe majority of the activity around nearby (z ≈ 0) supermassive black holes is found in low-luminosity active galactic nuclei (LLAGN), the most of them being classified as low-ionization nuclear emission regions. Although these sources are well studied from radio up to X-rays, they are poorly understood in γ-rays.
Raniere de Menezes +4 more
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Broadband Modeling of Low-luminosity Active Galactic Nuclei Detected in Gamma Rays [PDF]
The Astrophysical Journal, 2021 Abstract Low-luminosity active galactic nuclei are more abundant and closer to us than the luminous ones but harder to explore as they are faint. We have selected the four sources, NGC 315, NGC 4261, NGC 1275, and NGC 4486, which have been detected in γ-rays by Fermi-LAT.
Gunjan Tomar +2 more
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