Results 1 to 10 of about 184,376 (200)
LINERs as low-luminosity active galactic nuclei [PDF]
Advances in Space Research, 1999 Many nearby galaxies contain optical signatures of nuclear activity in the form of LINER nuclei. LINERs may be the weakest and most common manifestation of the quasar phenomenon. The physical origin of this class of objects, however, has been ambiguous.
Luis C. Ho
arxiv +5 more sources
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
G. Giovannini, M. Giroletti
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Low-luminosity active galactic nuclei: are they UV faint and radio loud? [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Low-luminosity AGNs are perceived to be radio loud and devoid of a ``big blue bump'', indicating a transition from a radiatively efficient, geometrically thin, accretion disc in high-luminosity AGNs, to a geometrically thick, radiatively inefficient accretion flow at low luminosities and accretion rates.
Dan Maoz
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A high-frequency radio survey of low-luminosity active galactic nuclei [PDF]
Monthly Notices of the Royal Astronomical Society, 2005 15 pages, 5 figures.
Akihiro Doi +4 more
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The Clustering of Low‐Luminosity Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2006 27 pages, color figures, some are severely degraded in resolution, emulateapj. See http://www.physics.drexel.edu/~constant/work/agnclustering.ps for high resolution version.
Anca Constantin, Michael S. Vogeley
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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
Do LINER 2 galaxies harbour low-luminosity active galactic nuclei? [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 We use ROSAT HRI spatial data and ASCA spectral measurements for a sample of seven nearby, early type spiral galaxies, to address the question of whether a low-luminosity Active Galactic Nucleus (LLAGN) is present in galaxies that have a LINER 2 classification.
T. P. Roberts +2 more
openalex +5 more sources
Evidence That Shocks Destroy Small PAH Molecules in Low-luminosity Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2022 Abstract We combined mapping-mode mid-infrared Spitzer spectra with complementary infrared imaging to perform a spatially resolved study of polycyclic aromatic hydrocarbon (PAH) emission from the central regions of 66 nearby galaxies, roughly evenly divided into star-forming systems and low-luminosity active galactic nuclei (AGNs).
Lulu Zhang, Luis C. Ho, Aigen Li
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Are most low-luminosity active galactic nuclei really obscured? [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 At low Eddington ratio (mdot), two effects make it harder to detect AGN given some selection criteria. First, even with fixed accretion physics, AGN are diluted/less luminous relative to their hosts; the magnitude of this depends on host properties and so on luminosity and redshift.
Philip F. Hopkins +3 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
openalex +3 more sources