Obscured AGN at z < 1.5: X-Ray to Far-infrared SEDs and Host Galaxy Morphologies in the GOODS Fields
The Astrophysical JournalWe present an analysis of spectral energy distributions (SEDs), galaxy light profiles, and visual morphological classifications for 194 X-ray luminous active galactic nuclei (AGN) (intrinsic absorption-corrected $\mathrm{log}({L}_{{\rm{X}},0.5-7\,{\rm ...
William W.H. Jarvis +11 more
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Low-luminosity accretion in black hole X-ray binaries and active galactic nuclei [PDF]
Astrophysics and Space Science, 2005 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. The hard state is well-described by a two-temperature, optically thin, geometrically thick, advection-dominated accretion flow (ADAF) in which ...
openaire +4 more sources
Fermi-LAT Detection of the Low-luminosity Radio Galaxy NGC 4278 during the LHAASO Campaign
The Astrophysical Journal LettersWe present a study of the high-energy properties of the compact symmetric object NGC 4278, recently associated with a TeV source by the Large High Altitude Air Shower Observatory (LHAASO) collaboration.
Ettore Bronzini +3 more
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A Sample of Active Galactic Nuclei with Intermediate-mass Black Holes Extended to z ≈ 0.6
The Astrophysical Journal Supplement SeriesWe present a sample of 930 intermediate-mass black hole (IMBH) active galactic nuclei (AGNs) with BH masses of M _BH ≤ 2 × 10 ^6 M _⊙ , uniformly selected from the Seventeenth Data Release of the Sloan Digital Sky Survey, based on the detection of broad
Wen-Juan Liu +5 more
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Monitoring the Morphology of M87* in 2009–2017 with the Event Horizon Telescope
The Astrophysical Journal, 2020 The Event Horizon Telescope (EHT) has recently delivered the first resolved images of M87*, the supermassive black hole in the center of the M87 galaxy. These images were produced using 230 GHz observations performed in 2017 April.
Maciek Wielgus +218 more
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First X-Ray Polarimetric View of a Low-luminosity Active Galactic Nucleus: The Case of NGC 2110
The Astrophysical JournalLow-luminosity active galactic nuclei (LLAGN) provide a unique view of Comptonization and nonthermal emission from accreting black holes in the low accretion rate regime.
Sudip Chakraborty +23 more
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On the Physical Origins of the Millimeter Fundamental Plane in Active Galactic Nuclei
The Astrophysical JournalObservations of active galactic nuclei have revealed a correlation between millimeter luminosity, X-ray luminosity, and mass, suggesting the emission in each of these bands is powered by a common source.
Kratika Mazde +2 more
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JWST NIRCam Imaging of NGC 4258. I. Observation Overview
The Astrophysical JournalWe present James Webb Space Telescope (JWST) Near-Infrared Camera imaging of the nearby Seyfert 1.9 galaxy NGC 4258, which hosts strong star formation regions as well as an anomalous jet-like radio structure that extends through a significant portion of ...
Travis C. Fischer +5 more
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Probing The Central Engines Of Low-Luminosity Active Galactic Nuclei
, 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).
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No Galaxy-scale [C ii] Fast Outflow in the z = 6.72 Red Quasar HSC J1205–0000
The Astrophysical JournalHSC 120505.09-000027.9 (J1205–0000) is one of the highest redshift ( z = 6.72) dust-reddened quasars (red quasars) known to date. We present an improved analysis of Atacama Large Millimeter/submillimeter Array data of the [C ii ] 158 μ m line and the ...
Mahoshi Sawamura +19 more
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