Results 1 to 10 of about 62,724 (238)
Unified Schemes for Radio-Loud Active Galactic Nuclei [PDF]
Publications of the Astronomical Society of the Pacific, 1995 The appearance of active galactic nuclei (AGN) depends so strongly on orientation that our current classification schemes are dominated by random pointing directions instead of more interesting physical properties.
Padovani, Paolo, Urry, C. Megan
core +4 more sources
X-ray Properties of Radio-Selected Dual Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2019 Merger simulations predict that tidally induced gas inflows can trigger kpc-scale dual active galactic nuclei (dAGN) in heavily obscured environments. Previously with the Very Large Array, we have confirmed four dAGN with redshifts between $0.04 < z < 0 ...
Djorgovski, S . G. +4 more
core +7 more sources
On the radio dichotomy of active galactic nuclei [PDF]
The Astrophysical Journal, 2016 It is still a mystery why only a small fraction of active galactic nuclei (AGNs) contain relativistic jets. Strong magnetic field is a necessary ingredient for jet formation, however, the advection of the external field in a geometrically thin disk is ...
Cao, Xinwu
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Radio observations of active galactic nuclei with mm-VLBI [PDF]
The Astronomy and Astrophysics Review, 2017 Over the past few decades, our knowledge of jets produced by active galactic nuclei (AGN) has greatly progressed thanks to the development of very-long-baseline interferometry (VLBI).
Boccardi, B. +3 more
core +7 more sources
Investigating the Star Formation Characteristics of Radio Active Galactic Nuclei [PDF]
The Astrophysical JournalThe coevolution of supermassive black holes and their host galaxies represents a fundamental question in astrophysics. One approach to investigating this question involves comparing the star formation rates (SFRs) of active galactic nuclei (AGNs) with ...
Bojun Zhang +7 more
doaj +5 more sources
Identifying Radio-active Galactic Nuclei among Radio-emitting Galaxies [PDF]
The Astrophysical Journal, 2020 Basing our analysis on ROGUE I, a catalog of over 32,000 radio sources associated with optical galaxies, we provide two diagnostics to select the galaxies where the radio emission is dominated by an active galactic nucleus (AGN), referred to in the paper
D. Kozieł-Wierzbowska +6 more
semanticscholar +6 more sources
The radio emission from active galactic nuclei [PDF]
Astronomy & Astrophysics, 2021 Context. For nearly seven decades, astronomers have been studying active galaxies, that is to say, galaxies with actively accreting central supermassive black holes: active galactic nuclei (AGN).
J. Radcliffe +11 more
semanticscholar +7 more sources
Radio Loud and Radio Quiet Active Galactic Nuclei [PDF]
The Astronomical Journal, 1999 We generated a sample of 409 AGNs for which both the radio luminosity at 5 GHz and the line luminosity in [OIII] 5007 have been measured. The radio luminosity spans a range of ten orders of magnitude, and the [OIII] line luminosity spans a range of eight
Antonucci R. +33 more
core +6 more sources
Recurrent radio activity in active galactic nuclei [PDF]
EPJ Web of Conferences, 2012 There has been a growing body of persuasive evidence to indicate that AGN activity, powered by mass accretion onto a supermassive black hole, can involve multiple episodes.
Jamrozy M.
doaj +3 more sources
ENERGETICS AND LIFETIMES OF LOCAL RADIO ACTIVE GALACTIC NUCLEI [PDF]
The Astrophysical Journal, 2015 We present a model describing the evolution of Fanaroff–Riley type I and II radio active galactic nuclei (AGNs) and the transition between these classes. We quantify galactic environments using a semianalytic galaxy formation model and apply our model to
R. Turner, S. Shabala
semanticscholar +4 more sources