Results 21 to 30 of about 6,679 (304)
Offsets between X-Ray and Radio Components in X-Ray Jets: The AtlasX
The Astrophysical Journal Supplement Series, 2023 The X-ray emission mechanism of powerful extragalactic jets—which has important implications for their environmental impacts—is poorly understood. The X-ray/radio positional offsets in the individual features of jets provide important clues.
Karthik Reddy +4 more
doaj +1 more source
Jets in FR0 radio galaxies [Dataset]
, 2023 The local radio-loud AGN population is dominated by compact sources named FR0s. These sources show features, for example the host type, the mass of the supermassive black hole (SMBH), and the multi-band nuclear characteristics, that are similar to those ...
Lico, R.
core +1 more source
Symposium - International Astronomical Union, 1984 Models are here presented interpreting the arcsecond radio structure found in the quasar 3C418 as a precessing jet. No simple solution exists and it has been found necessary to complicate the model geometry by allowing the precession cone-angle to increase with time.
T.W.B. Muxlow, M. Jullian, R. Linfield
openaire +1 more source
Identifying changing jets through their radio variability
, 2021 Context. Supermassive black holes can launch highly relativistic jets with velocities reaching Lorentz factors of as high as Γ > 50. How the jets accelerate to such high velocities and where along the jet they reach terminal velocity are open questions ...
Gurwell, M. A. +13 more
core +1 more source
Radio Jet and Lobe of 3C273 [PDF]
Symposium - International Astronomical Union, 1986 The ‘superluminal’ motion observed in the cores of radio sources such as 3C273 is now accepted as evidence of relativistic motion within a few parsecs of the centre, but it is less clear whether such speeds persist out to kiloparsec scales. The one-sidedness of such sources is often cited as evidence of relativistic Doppler beaming, but could equally ...
openaire +1 more source
Spectral ageing in the lobes of FR-II radio galaxies: new methods of analysis for broad-band radio data [PDF]
, 2013 The broad-bandwidth capabilities of next generation telescopes such as the Jansky Very Large Array (JVLA) mean that the spectrum of any given source varies significantly within the bandwidth of any given observation.
Goodger, J. L. +7 more
core +1 more source
The Astronomical Journal, 1992 High-sensitivity VLA observations of M51 at 6 cm wavelength with sub-arcsecond resolution have resolved the southern extra-nuclear cloud identified by Ford et al. [ApJ, 293, 132 (1985)]. These observations reveal a short (3-4"), sinuous jetlike feature connecting the weak nuclear radio source to a bright arcuate ridge of radio emission that dominates ...
CRANE, PC, VANDERHULST, JM
openaire +3 more sources
Galaxies, 2021 The radiative and jet power in active galactic nuclei is generated by accretion of material on to supermassive galactic-centre black holes. For quasars, where the radiative power is by definition very high, objects with high radio luminosities form 10 ...
Gülay Gürkan +5 more
doaj +1 more source
Instability Wave Models of Turbulent Jets from Round and Serrated Nozzles [PDF]
, 2010 In this thesis we study pressure fluctuations associated with large-scale coherent structures in turbulent round and serrated jets. Linear disturbances to the turbulent mean flow of the round jet are modeled via linear stability analysis and the ...
Guðmundsson, Kristján
core +1 more source
Simulations of Precessing Jets and the Formation of X-shaped Radio Galaxies
The Astrophysical Journal, 2023 Jet precession is sometimes invoked to explain asymmetries in radio galaxy (RG) jets and “X/S/Z-shaped” RGs, caused by the presence of a binary black hole companion to the source active galactic nucleus or by accretion instabilities.
Chris Nolting, Jay Ball, Tri M. Nguyen
doaj +1 more source