Results 11 to 20 of about 23,272 (235)
Unified Schemes for Radio-Loud Active Galactic Nuclei [PDF]
Publications of the Astronomical Society of the Pacific, 1995 88 pages, latex file, uses aaspp.sty macro (available via ftp from ftp://aas.org/pubs/aastex/). Accompanying 22 figures and 3 tables available at http://itovf2.roma2.infn.it/padovani/review.html. (Abstract is abridged.) The only change is that the revised version indicates this paper is an invited review for PASP, in press, September 1995 ...
C. Megan Urry, Paolo Padovani
semanticscholar +6 more sources
Investigating the Star Formation Characteristics of Radio Active Galactic Nuclei [PDF]
The Astrophysical JournalAbstract The 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 those of typical star-forming galaxies.
Bojun Zhang +7 more
doaj +4 more sources
The Nature of the Energy Source in Radio Galaxies and Active Galactic Nuclei [PDF]
Symposium - International Astronomical Union, 1982 For more than 20 years it has been known that extragalactic radio sources contain up to 1060–1062 ergs in the form of relativistic electrons and magnetic fields. One arrives at these figures if one assumes that the radio emission is due to the synchrotron process and the source contains an equal amount of energy in electrons and fields (Burbidge 1956).
F. Pacini, M. Salvati
openaire +3 more sources
Hot Dust in Radio-loud Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2003 12 pages, 2 figures. To appear in ApJ Letters. Also available at http://stecf.org/~wfreudli/pubs/
Wolfram Freudling +2 more
openaire +5 more sources
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). Nevertheless, the crucial mechanisms involved in the formation of the plasma flow, as well as those driving its exceptional radiative output up to TeV energies, remain to
J. A. Zensus +4 more
openaire +6 more sources
NGC 5252: a pair of radio-emitting active galactic nuclei? [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2016 Abstract The X-ray source CXO J133815.6+043255 has counterparts in the UV, optical, and radio bands. Based on the multiband investigations, it has been recently proposed by Kim et al. as a rarely seen off-nucleus ultraluminous X-ray (ULX) source with a black hole mass of ≥104 M⊙ in the nearby Seyfert galaxy NGC 5252. To explore its radio
Jun Yang +10 more
openaire +7 more sources
The origin of radio emission from radio-quiet active galactic nuclei [PDF]
Nature Astronomy, 2019 The central nuclei of galaxies, where supermassive black holes (SMBHs) are thought to reside, can experience phases of activity when they become active galactic nuclei (AGNs). An AGN can eject winds and jets and produce radiation across the entire electromagnetic spectrum.
Ehud Behar +6 more
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Cosmic Evolution of Nearby Radio Active Galactic Nuclei
Journal of Physics: Conference Series, 2019 Abstract The exact formation mechanism of massive galaxy in the universe still become an open question in modern astrophysics. Radio emission from active galactic nucleus (AGN) is known to be suppressing stellar growth in the most massive galaxies, thus becoming significant ingredient in modeling galaxy formation process.
Taufik Andika, I. +5 more
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X-Ray Properties of Radio-selected Dual Active Galactic Nuclei [PDF]
The Astrophysical Journal, 2019 Abstract Merger simulations predict that tidally induced gas inflows can trigger kiloparsec-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 < 0.22 and projected separations between 4.3 and 9.2 kpc in the ...
Arran C. Gross +4 more
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Compact Radio Sources, Quasars and Active Galactic Nuclei [PDF]
Australian Journal of Physics, 1994 This paper reviews John G. Bolton's contributions to our understanding of compact radio sources associated with quasars and active galactic nuclei (AGNs), and his work leading to the discovery of quasars. Particular attention is given to the interpretation of the observed properties of quasars and AGNs within the framework of unified models which ...
K. L. Kellermann
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