Search results for "3C 273"

showing 2 items of 2 documents

RadioAstron reveals a spine-sheath jet structure in 3C 273

2021

We present Space-VLBI RadioAstron observations at 1.6 GHz and 4.8 GHz of the flat spectrum radio quasar 3C 273, with detections on baselines up to 4.5 and 3.3 Earth Diameters, respectively. Achieving the best angular resolution at 1.6 GHz to date, we have imaged limb-brightening in the jet, not previously detected in this source. In contrast, at 4.8 GHz, we detected emission from a central stream of plasma, with a spatial distribution complementary to the limb-brightened emission, indicating an origin in the spine of the jet. While a stratification across the jet width in the flow density, internal energy, magnetic field, or bulk flow velocity are usually invoked to explain the limb-brighte…

Astrophysics::High Energy Astrophysical PhenomenaStratification (water)FOS: Physical sciencesJets [Galaxies]AstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesQuasars: individual: 3C 2730103 physical sciencesAngular resolution010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsPhysicsJet (fluid)Internal energy010308 nuclear & particles physicsAstronomy and AstrophysicsQuasarPlasmaGalaxies: activeAstrophysics - Astrophysics of GalaxiesActive [Galaxies]Magnetic fieldFlow velocitySpace and Planetary ScienceGalaxies: jetsAstrophysics of Galaxies (astro-ph.GA)Astrophysics::Earth and Planetary AstrophysicsIndividual: 3C 273 [Quasars]
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The role of Kelvin-Helmholtz instability in the internal structure of relativistic outflows. The case of the jet in 3C 273

2006

Relativistic outflows represent one of the best-suited tools to probe the physics of AGN. Numerical modelling of internal structure of the relativistic outflows on parsec scales provides important clues about the conditions and dynamics of the material in the immediate vicinity of the central black holes in AGN. We investigate possible causes of the structural patterns and regularities observed in the parsec-scale jet of the well-known quasar 3C 273. We present here the results from a 3D relativistic hydrodynamics numerical simulation based on the parameters given for the jet by Lobanov & Zensus (2001), and one in which the effects of jet precession and the injection of discrete compone…

Astrophysics::High Energy Astrophysical PhenomenaPerturbation (astronomy)FOS: Physical sciencesAstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICAAstrophysics01 natural sciencesJets0103 physical sciencesVery-long-baseline interferometry010306 general physicsQuasars010303 astronomy & astrophysicsPhysicsSuperluminal motionQuasars ; 3C 273 ; Active galaxies ; Galaxies ; Jets ; HydrodynamicsComputer simulationAstrophysics (astro-ph)Mode (statistics)Astronomy and AstrophysicsQuasarGalaxiesViewing angle:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]Wavelength13. Climate actionSpace and Planetary ScienceActive galaxiesHydrodynamics3C 273UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]
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