Results 151 to 160 of about 90,767 (300)

Spoon-feeding an active galactic nucleus [PDF]

open access: yesProceedings of Swift: 10 Years of Discovery — PoS(SWIFT 10), 2015
Deborah Mainetti   +6 more
openaire   +1 more source

A Systematic Search for Active Galactic Nucleus Flares in ZTF Data Release 23

open access: yesThe Astrophysical Journal Supplement Series
Active galactic nuclei (AGNs) are known to exhibit stochastic variability across a wide range of timescales and wavelengths. AGN flares are extreme outbursts that deviate from this typical behavior and may trace a range of energetic physical processes ...
Lei He   +15 more
doaj   +1 more source

EXTENDED X-RAY EMISSION IN THE H I CAVITY OF NGC 4151: GALAXY-SCALE ACTIVE GALACTIC NUCLEUS FEEDBACK? [PDF]

open access: bronze, 2010
Junfeng Wang   +7 more
openalex   +1 more source

The Contribution of Turbulent Active Galactic Nucleus Coronae to the Diffuse Neutrino Flux

open access: yesThe Astrophysical Journal
Active galactic nuclei (AGN) can accelerate protons to energies of ∼10–100 TeV, with secondary production of high-energy neutrinos. If the acceleration is driven by magnetized turbulence, the main properties of the resulting proton and neutrino spectra ...
Damiano F. G. Fiorillo   +4 more
doaj   +1 more source

How Quasar Feedback May Shape the Co-evolutionary Paths

open access: yesFrontiers in Astronomy and Space Sciences, 2017
Observations point toward some form of “co-evolutionary sequence,” from dust-enshrouded starbursts to luminous unobscured quasars. Active galactic nucleus (AGN) feedback is generally invoked to expel the obscuring dusty gas in a blow-out event ...
Wako Ishibashi
doaj   +1 more source

ACTIVE GALACTIC NUCLEUS FEEDBACK IN THE HOT HALO OF NGC 4649

open access: yesThe Astrophysical Journal, 2014
Using the deepest available Chandra observations of NGC 4649, we find strong evidences of cavities, ripples, and ring-like structures in the hot interstellar medium that appear to be morphologically related with the central radio emission. These structures show no significant temperature variations in correspondence with higher pressure regions (0.5 ...
Paggi, Alessandro   +6 more
openaire   +3 more sources

Host galaxy-active galactic nucleus alignments in the Sloan Digital Sky Survey Data Release 7 [PDF]

open access: bronze, 2011
Claudia del P. Lagos   +4 more
openalex   +1 more source

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