Results 101 to 110 of about 6,292 (222)
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
, 2014 The correlation between the kinetic power P-jet and intrinsic bolometric luminosity L-jet of jets may reveal the underlying jet physics in various black hole systems.
Ma, Renyi, Xie, Fu-Guo, Hou, Shujin
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The bulk kinetic power of radio jets in active galactic nuclei？
, 2009 Based on the Konigl's inhomogeneous jet model, we estimate the jet parameters, such as bulk Lorentz factor Gamma, viewing angle theta and electron number density n(e) from radio very long-baseline interferometry and X-ray data for a sample of active ...
D. R. Jiang +5 more
core +1 more source
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
doaj +1 more source
The complex structure of low-luminosity active galactic nuclei: NGC 4579 [PDF]
Monthly Notices of the Royal Astronomical Society, 2004 We have modelled the low-luminosity active galactic nucleus (AGN) NGC 4579 by explaining both the continuum and the line spectra observed with different apertures. It was found that the nuclear emission is dominated by an AGN such that the flux from the active centre (AC) is relatively low compared with that of the narrow emission-line region (NLR) of ...
openaire +1 more source
Multiple Emission Regions in Jets of the Low-Luminosity Active Galactic Nucleus in NGC 4278
The Astrophysical JournalThe Large High Altitude Air Shower Observatory (LHAASO) has detected very-high-energy gamma rays from the low-ionization nuclear emission-line region galaxy NGC 4278, which has a low-luminosity active galactic nucleus (LLAGN) and symmetric, mildly ...
Samik Dutta, Nayantara Gupta
doaj +1 more source
The DELVE Quadruple Quasar Search. I. A Lensed Low-luminosity Active Galactic Nucleus
The Astronomical JournalA quadruply lensed source, J125856.3–031944, has been discovered using the DELVE survey and Wide-field Infrared Survey Explorer W1–W2 colors. Follow-up direct imaging carried out with the Magellan Baade 6.5 m telescope is analyzed, as is spectroscopy ...
Paul L. Schechter +27 more
doaj +1 more source
Are the jets accelerated from the disk coronas in some active galactic nuclei?
, 2004 We use a sample of radio-loud active galactic nuclei (AGNs) with estimated central black hole masses to explore AGN jet-formation mechanisms. The jet power of AGNs is estimated from their extended radio luminosity.
Cao, XW
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