Results 111 to 120 of about 4,173,094 (217)
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
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Science of active galactic nuclei with the GTC and CanariCam [PDF]
, 2008 CanariCam is the facility mid-infrared (MIR) instrument for the Gran Telescopio Canarias (GTC), a 10.4m telescope at the Observatorio del Roque de los Muchachos on La Palma. One of the science drivers for CanariCam is the study of active galactic nuclei (
ITZIAR ARETXAGA MENDEZ
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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
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The properties of discrete X-ray sources in star-forming galaxies [PDF]
, 2012 Observations of starburst galaxies have revealed a large number of point-like X-ray sources located within these systems, including active galactic nuclei (AGN), X-ray binaries (XRBs), and utraluminous X-ray sources (ULXs).
JACKSON, FLOYD,EMMANUEL
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BASS. XLVII. 22 GHz Radio Atlas of Swift-BAT Selected AGN
The Astrophysical JournalWe present the third phase of the largest high-frequency, high-resolution imaging survey of 231 nearby, hard X-ray selected active galactic nuclei (AGNs), with a very high 98% ± 1% detection fraction.
Macon Magno +18 more
doaj +1 more source
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
Low-luminosity active galactic nuclei: are they UV faint and radio loud? [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Low-luminosity AGNs are perceived to be radio loud and devoid of a ``big blue bump'', indicating a transition from a radiatively efficient, geometrically thin, accretion disc in high-luminosity AGNs, to a geometrically thick, radiatively inefficient accretion flow at low luminosities and accretion rates.
openaire +2 more sources
Relation between radio core length and black hole mass for active galactic nuclei
, 2002 We explore the relation between the linear length of radio core and the central black hole mass for a sample of radio-loud active galactic nuclei (AGNs). An empirical relation between the size of the broad line region (BLR) and optical luminosity is used
Jiang, DR, Cao, XW
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Prevalence of Compact Nuclear Radio Emission in Post-merger Galaxies and Its Origin
The Astrophysical JournalPost-merger galaxies are unique laboratories to study the triggering and interplay of star formation and active galactic nucleus (AGN) activity. Combining new, high-resolution Jansky Very Large Array (VLA) observations with archival radio surveys, we ...
Gregory Walsh, Sarah Burke-Spolaor
doaj +1 more source
The role of environment in the observed Fundamental Plane of radio active galactic nuclei [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 The optical Fundamental Plane of black hole activity relates radio continuum luminosity of Active Galactic Nuclei to [O III] luminosity and black hole mass. We examine the environments of low redshift ($z<0.2$) radio-selected AGN, quantified through galaxy clustering, and find that halo mass provides similar mass scalings to black hole mass in the ...
openaire +2 more sources