Results 31 to 40 of about 40,224 (203)
Hot Dust in Radio-loud Active Galactic Nuclei
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 +2 more sources
On the dust geometry in radio-loud active galactic nuclei [PDF]
Monthly Notices of the Royal Astronomical Society, 2010 17 pages, 12 figures, accepted by ...
Hermine Landt +2 more
openaire +3 more sources
VLBI detection of an Infrared-Faint Radio Source [PDF]
, 2007 Infrared-Faint Radio Sources represent a new and unexpected class of object which is bright at radio wavelengths but unusually faint at infrared wavelengths.
Adam Deller +14 more
core +4 more sources
Optical-radio positional offsets for active galactic nuclei [PDF]
Astronomy & Astrophysics, 2013 Context. It will soon become possible to directly link the most accurate radio reference frame with the Gaia optical reference frame using many common extragalactic objects. It is important to know the level of coincidence between the radio and optical positions of compact active galactic nuclei (AGN). Aims.
Orosz, Gábor, Frey, Sándor
openaire +3 more sources
Radio Emission from Active Galactic Nuclei [PDF]
Symposium - International Astronomical Union, 1987 Active Galactic Nuclei and quasars are characterized at radio wavelengths by a high surface brightness, a flat spectrum, variations in intensity on time scales of a few days to a few years, and by large internal motions which probably reflect Doppler beaming from a synchrotron source which is moving with relativistic velocity away from the central ...
openaire +1 more source
Detecting the 21 cm Forest in the 21 cm Power Spectrum
, 2014 We describe a new technique for constraining the radio loud population of active galactic nuclei at high redshift by measuring the imprint of 21 cm spectral absorption features (the 21 cm forest) on the 21 cm power spectrum.
Dillon, Joshua S. +3 more
core +1 more source
Radio Loudness of Active Galactic Nuclei: Observational Facts and Theoretical Implications [PDF]
The Astrophysical Journal, 2007 We investigate how the total radio luminosity of AGN-powered radio sources depends on their accretion luminosity and the central black hole mass. Our studies cover about seven orders of magnitude in accretion luminosity and the full range of AGN black hole masses. We find that AGNs form two distinct and well separated sequences on the radio-loudness --
Sikora, Marek +2 more
openaire +3 more sources
Origin of Radio Emission from Nearby Low-Luminosity Active Galactic Nuclei
, 2004 We use the observational data in radio, optical and X-ray wavebands, for a sample of active galactic nuclei (AGNs) with measured black hole masses, to explore the origin of radio emission from nearby low-luminosity active galactic nuclei (LLAGNs).
Falcke H. +8 more
core +1 more source
A 3.5 mm POLARIMETRIC SURVEY OF RADIO-LOUD ACTIVE GALACTIC NUCLEI [PDF]
The Astrophysical Journal Supplement Series, 2010 Published in the Astrophysical Journal Supplement Series.
Agudo, I. +3 more
openaire +2 more sources
Millimeter-Wave Monitoring of Active Galactic Nuclei with the Africa Millimetre Telescope
Galaxies, 2019 Active galactic nuclei are the dominant sources of gamma rays outside our galaxy and are also candidates for the source of ultra-high energy cosmic rays.
Michael Backes +2 more
doaj +1 more source