Results 111 to 120 of about 771 (176)
UEG Week 2025 Moderated Posters
United European Gastroenterology Journal, Volume 13, Issue S8, Page S189-S802, October 2025.
wiley +1 more source
A search for distant radio-loud quasars in the CLASS survey: three new radio-selected quasars at z > 4 [PDF]
, 2001 We report on the search for distant radio-loud quasars in the Cosmic Lens All Sky Survey (CLASS) of flat spectrum radio sources with S-5GHz > 30 mJy. Unresolved optical counterparts were selected from APM scans of POSS-I plates, with e 2.0 colours, in ...
Dennett-Thorpe, J. +5 more
core +1 more source
The Astrophysical JournalThe origin of core radio emission in radio-quiet active galactic nuclei (AGNs) is still actively debated. General-relativistic magnetohydrodynamics simulations often predict the launching of moderately large-scale jets from super-Eddington accretion ...
Jeremiah D. Paul, Richard M. Plotkin
doaj +1 more source
Soft gamma rays from low accreting supermassive black holes and connection to energetic neutrinos. [PDF]
Nat Commun, 2021 Kimura SS, Murase K, Mészáros P.
europepmc +1 more source
UEG Week 2025 Poster Presentations
United European Gastroenterology Journal, Volume 13, Issue S8, Page S803-S1476, October 2025.
wiley +1 more source
Radio-loud and radio-quiet quasars: one population, different epochs of observation
, 2008 I bring together evidence for the rapidity with which quasars' radio synchrotron lobe emission fades and for the intermittency with which jet plasma is ejected from individual quasars and radio galaxies and affirm the picture presented by Nipoti et al ...
Blundell, Katherine, Blundell, K
core
Optical variability of radio-luminous palomar-green quasars
, 1998 The goal of this project is to test the shocked jet model for quasar variability at optical wavelengths. The ten quasars with the highest radio core luminosity at 5 GHz in the Palomar Bright Quasar Survey were selected for this monitoring program; Seven ...
Eggers, Diane
core +1 more source
Mid-infrared Properties of Narrow-line Seyfert 1 Galaxies Detected by LoTSS DR2
The Astrophysical JournalNarrow-line Seyfert 1 galaxies (NLS1s), a subclass of active galactic nuclei (AGNs) in an early stage of the accretion process, are also found to host relativistic jets. However, currently known jetted NLS1s are rare. The majority of NLS1s are undetected
Xu-Liang Fan
doaj +1 more source
Exploring Quasar Variability with ZTF at 0 < z < 3: A Universal Relation with the Eddington Ratio
The Astrophysical JournalQuasars, powered by accretion onto supermassive black holes (SMBHs), exhibit significant variability, offering insights into the physics of accretion and the properties of the central engines.
Hygor Benati Gonçalves +4 more
doaj +1 more source