Results 151 to 160 of about 1,192 (180)
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Science, 1982
A variety of recent optical, radio, and x-ray observations have confirmed the hypothesis that the peculiar star SS 433 is ejecting two narrow, opposed, highly collimated jets of matter at one-quarter the speed of light. This unique behavior is probably driven by mass exchange between a relatively normal star and a compact companion, either a neutron ...
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A variety of recent optical, radio, and x-ray observations have confirmed the hypothesis that the peculiar star SS 433 is ejecting two narrow, opposed, highly collimated jets of matter at one-quarter the speed of light. This unique behavior is probably driven by mass exchange between a relatively normal star and a compact companion, either a neutron ...
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Relativistic Jet Formation in Microquasars
Astrophysics and Space Science, 2001Microquasars produce collimated, relativistic flow at speeds up to a Lorentz factor of ∼ 3 (0.94c). It is generally believed that such flow velocities indicate that jet acceleration and collimation occurs in the relativistic environment of a supermassive black hole.
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New Astronomy Reviews, 1998
Abstract We discuss the structure and relativistic kinematics that develop in three spatial dimensions when a moderately hot, supersonic jet propagates into a denser background medium and encounters resistance from an oblique magnetic field. Our simulations incorporate relativistic MHD in a four-dimensional spacetime and clearly show that (a ...
K.-I. Nishikawa +6 more
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Abstract We discuss the structure and relativistic kinematics that develop in three spatial dimensions when a moderately hot, supersonic jet propagates into a denser background medium and encounters resistance from an oblique magnetic field. Our simulations incorporate relativistic MHD in a four-dimensional spacetime and clearly show that (a ...
K.-I. Nishikawa +6 more
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Extragalactic relativistic jets
Proceedings of the International Astronomical Union, 2018AbstractRelativistic jets are one of the most powerful manifestations of the release of energy produced around supermassive black holes at the centre of active galactic nuclei (AGN). Their emission is observed across the entire electromagnetic spectrum, from the radio band to gamma rays.
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Relativistic MHD Simulations of Relativistic Jets with RAISHIN
AIP Conference Proceedings, 2007We have performed numerical simulations of weakly and strongly magnetized relativistic jets embedded in a weakly and strongly magnetized stationary or mildly relativistic (0.5c) sheath using the RAISHIN code. In the numerical simulations a jet with Lorentz factor γ = 2.5 is processed to break the initial equilibrium configuration.
Y. Mizuno +3 more
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Energy Distribution of Relativistic GRB Jets
AIP Conference Proceedings, 2008We investigate relativistic jet propagation in the collapsar and interstellar medium, using 2‐dimensional relativistic hydrodynamic simulations. The jet is assumed to be initially thermal dominated plasma and have half opening angle (5 degrees). Realistic progenitor models are adopted and the difference of the outflow properties by different progenitor
Akira Mizuta +5 more
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Physics Bulletin, 1981
The star SS433 is a cosmic physics laboratory testing special relativity and the Doppler effect, not to mention the theory of supernovae and black holes.
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The star SS433 is a cosmic physics laboratory testing special relativity and the Doppler effect, not to mention the theory of supernovae and black holes.
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Relativistic jets in the universe
New Astronomy Reviews, 2003Abstract Relativistic outflows are a common phenomenon in accreting black holes. Despite the enormous differences in scale, stellar-mass black holes in X-ray binaries and collapsars, and super-massive black holes at the dynamic centre of galaxies are sources of jets with analogous physical properties.
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2014
Relativistic jets can be modeled as magnetohydrodynamic flows. We analyze the related equations and discuss the involved acceleration mechanisms, their relation to the collimation, to the jet confinement by its environment, and to possible rarefaction waves triggered by pressure imbalances.
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Relativistic jets can be modeled as magnetohydrodynamic flows. We analyze the related equations and discuss the involved acceleration mechanisms, their relation to the collimation, to the jet confinement by its environment, and to possible rarefaction waves triggered by pressure imbalances.
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General Relativistic Magnetohydrodynamical Models of Relativistic Jets
AIP Conference Proceedings, 2007The general relativistic magnetohydrodynamical approximation is used to study plasma flows near rotating black holes and the formation of jets. The magnetized jet from the rotating black hole is found to be efficiently accelerated to Lorentz factors of Γ ≳ 10. The magnetized jet is collimated by the corona, which has a wind component that reaches Γ ≲ 3.
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