Results 11 to 20 of about 47,541 (242)
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 ...
Maoz, Dan
core +8 more sources
Study of Swift/BAT Selected Low-luminosity Active Galactic Nuclei Observed with Suzaku [PDF]
The Astrophysical Journal, 2016 We systematically analyze the broadband (0.5--200 keV) X-ray spectra of hard X-ray ($>10$ keV) selected local low-luminosity active galactic nuclei (LLAGNs) observed with {\it Suzaku} and {\it Swift}/BAT. The sample consists of ten LLAGNs detected with {\
Kawamuro, Taiki +4 more
core +4 more sources
Radio Sources in Low-Luminosity Active Galactic Nuclei. III. "AGNs" in a Distance-Limited Sample of "LLAGNs" [PDF]
Astronomy & Astrophysics, 2002 (abbreviated): This paper presents the results of a high resolution radio imaging survey of all known (96) low-luminosity active galactic nuclei (LLAGNs) at D 10^8 K.
A. S. Wilson +134 more
core +9 more sources
The Size of the Radio-Emitting Region in Low-luminosity Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2005 We have used the VLA to study radio variability among a sample of 18 low luminosity active galactic nuclei (LLAGNs), on time scales of a few hours to 10 days. The goal was to measure or limit the sizes of the LLAGN radio-emitting regions, in order to use
de Bruyn A. G. +12 more
core +3 more sources
LINERs as Low-Luminosity Active Galactic Nuclei [PDF]
Advances in Space Research, 1998 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.
Antonucci +44 more
core +3 more sources
Low-Luminosity Active Galactic Nuclei [PDF]
Symposium - International Astronomical Union, 1989 I review the basic properties of low-luminosity active galactic nuclei (LLAGNs) — objects in which activity similar to, but intrinsically milder than, that in QSOs and luminous Seyferts is believed to be present. Until recently, most LLAGNs were first recognized as such and studied at optical wavelengths, but evidence for activity and valuable ...
A. Filippenko
semanticscholar +2 more sources
Broadband Modeling of Low-luminosity Active Galactic Nuclei Detected in Gamma Rays [PDF]
The Astrophysical Journal, 2021 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 ...
Gunjan Tomar, N. Gupta, R. Prince
semanticscholar +4 more sources
Gamma-ray observations of low-luminosity active galactic nuclei [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 The 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.
R. de Menezes +4 more
semanticscholar +4 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 ...
G. Abbey +5 more
semanticscholar +2 more sources
Polarized Broad-Line Emission from Low-Luminosity Active Galactic Nuclei [PDF]
The Astrophysical Journal, 1999 In order to determine whether unified models of active galactic nuclei apply to low-luminosity objects, we have undertaken a spectropolarimetric survey of of LINERs and Seyfert nuclei at the Keck Observatory. The 14 objects observed have a median H-alpha
Aaron J. Barth +8 more
core +4 more sources