Results 101 to 110 of about 4,973 (222)
A hunt for dual radio active galactic nuclei in the VLASS
, 2014 5 pages, 4 figures, submitted as a whitepaper to the NRAO VLASS call: https://science.nrao.edu/science/surveys ...
Burke-Spolaor, Sarah +7 more
openaire +2 more sources
Optical Spectra of Radio-Loud and Radio-Quiet Active Galactic Nuclei [PDF]
Symposium - International Astronomical Union, 1982 Many radio galaxies have strong emission lines in their optical spectra. The fraction with such lines is much larger than in “normal” galaxies. Radio galaxies generally also have very bright nuclei; thus those with strong emission lines are similar in both respects to Seyfert galaxies.
openaire +1 more source
The Astrophysical JournalTo facilitate new studies of galaxy-merger-driven fueling of active galactic nuclei (AGNs), we present a catalog of 387 AGNs that we have identified in the final population of over 10,000 z < 0.15 galaxies observed by the Sloan Digital Sky Survey-IV ...
Julia M. Comerford +9 more
doaj +1 more source
Physics from Time Variability of the VHE Blazar PKS 2155-304 [PDF]
, 2010 Blazars are the principal extragalactic sources of very high energy gamma-ray emission in the Universe. These objects constitute a sub-class of Active Galactic Nuclei whose emission is dominated by Doppler boosted non-thermal radiation from plasma ...
BARRES-DE-ALMEIDA, ULISSES
core
The jet power, radio loudness, and black hole mass in radio-loud active galactic nuclei
, 2006 Jet formation is thought to be closely connected with the mass of the central supermassive black hole in active galactic nuclei. The radio luminosity commonly used in investigating this issue is merely an indirect measure of the energy transported ...
Liu, Y, Gu, MF, Jiang, DR
core
How relevant is the torus activity/geometry for the TeV gamma-rays emitted in the jet of M87? [PDF]
, 2003 Copyright © 2003. Astronomical Society of the Pacific. All rights reserved. Printed in U.S.A. Submitted to Cornell University’s online archive www.arXiv.org in 2003 by Donea A.-C.
Donea, A., Protheroe, R.
core
The Astrophysical JournalAbout 3%–10% of Type I active galactic nuclei (AGNs) have double-peaked broad Balmer lines in their optical spectra originating from the motion of gas in their accretion disk.
Charlotte Ward +14 more
doaj +1 more source
Evidence for Infrared-faint Radio Sources as z > 1 Radio-loud Active Galactic Nuclei [PDF]
, 2010 Infrared-Faint Radio Sources (IFRSs) are a class of radio objects found in the Australia Telescope Large Area Survey which have no observable mid-infrared counterpart in the Spitzer Wide-area Infrared Extragalactic (SWIRE) survey.
Siana, Brian D. +5 more
core +1 more source
Probing the High-frequency Variability of NGC 5044: The Key to Active Galactic Nucleus Feedback
The Astrophysical JournalThe active galactic nucleus (AGN) feeding and feedback process in the centers of galaxy clusters and groups is still not well understood. NGC 5044 is the ideal system in which to study AGN feedback. It hosts the largest known reservoir of cold gas in any
Gerrit Schellenberger +12 more
doaj +1 more source
The Astrophysical JournalInfrared-faint radio sources (IFRSs) are believed to be a rare class of radio-loud active galactic nuclei (AGNs) characterized by their high radio-to-infrared flux density ratios of up to several thousand.
Yihang Zhang +6 more
doaj +1 more source