Evidence That Shocks Destroy Small PAH Molecules in Low-luminosity Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2022 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 ...
Lulu Zhang, L. Ho, Aigen Li
semanticscholar +3 more sources
Are most low-luminosity active galactic nuclei really obscured? [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 At low Eddington ratios (ṁ), two effects make it more difficult to detect certain active galactic nuclei (AGN) given a particular set of selection methods.
Hernquist, Lars +3 more
core +4 more sources
Origin of Radio Emission from Nearby Low-Luminosity Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2004 We use the observational data in radio, optical and X-ray wavebands, for a sample of active galactic nuclei (AGNs) with measured black hole masses, to explore the origin of radio emission from nearby low-luminosity active galactic nuclei (LLAGNs).
Falcke H. +8 more
core +2 more sources
Surprisingly Strong K-band Emission Found in Low-luminosity Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2019 We examine the near-infrared (NIR) emission from low-luminosity active galactic nuclei (LLAGNs). Our galaxy sample includes 15 objects with detected 2–10 keV X-ray emission, dynamical black hole mass estimates from the literature, and available Gemini ...
Antoine Dumont +5 more
semanticscholar +5 more sources
The anti-correlation between the hard X-ray photon index and the Eddington ratio in LLAGNs [PDF]
, 2009 We find a significant anti-correlation between the hard X-ray photon index and the Eddington ratio L_Bol/L_Edd for a sample of Low-Ionization Nuclear Emission-line Regions (LINERs) and local Seyfert galaxies, compiled from literatures with Chandra or XMM-
Bian +65 more
core +3 more sources
Radio Sources in Low-Luminosity Active Galactic Nuclei.IV. Radio Luminosity Function, Importance of Jet Power, and Radio Properties of the Complete Palomar Sample [PDF]
, 2004 We present the completed results of a high resolution radio imaging survey of all (~200) low-luminosity active galactic nuclei (LLAGNs) and AGNs in the Palomar Spectroscopic Sample.
A. S. Wilson +134 more
core +7 more sources
THE NUCLEAR INFRARED EMISSION OF LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI [PDF]
The Astronomical Journal, 2012 We present high-resolution mid-infrared (MIR) imaging, nuclear spectral energy distributions (SEDs), and archival Spitzer spectra for 22 low-luminosity active galactic nuclei (LLAGNs; Lbol ≲ 1042 erg s−1).
R. Mason +11 more
semanticscholar +6 more sources
THE LOW-LUMINOSITY END OF THE RADIUS–LUMINOSITY RELATIONSHIP FOR ACTIVE GALACTIC NUCLEI [PDF]
The Astrophysical Journal, 2013 We present an updated and revised analysis of the relationship between the Hβ broad-line region (BLR) radius and the luminosity of the active galactic nucleus (AGN).
M. Bentz +17 more
semanticscholar +6 more sources
15-GHz radio emission from nearby low-luminosity active galactic nuclei [PDF]
Astronomy & Astrophysics, 2018 We present a sub-arcsec resolution radio imaging survey of a sample of 76 low-luminosity active galactic nuclei (LLAGN) that were previously not detected with the Very Large Array at 15 GHz.
P. Saikia +7 more
semanticscholar +11 more sources
Low-Luminosity Accretion in Black Hole X-ray Binaries and Active Galactic Nuclei [PDF]
Astrophysics and Space Science, 2004 At luminosities below a few percent of Eddington, accreting black holes switch to a hard spectral state which is very different from the soft blackbody-like spectral state that is found at higher luminosities.
A. Koratkar +77 more
core +4 more sources