Results 41 to 50 of about 636,285 (361)

Unconditional jetting [PDF]

open access: yesPhysical Review E, 2008
Capillary jetting of a fluid dispersed into another immiscible phase is usually limited by a critical Capillary number, a function of the Reynolds number and the fluid properties ratios. Critical conditions are set when the minimum spreading velocity of small perturbations $v^*_-$ along the jet (marginal stability velocity) is zero.
openaire   +5 more sources

Optical Polarimetry and Radio Observations of PKS1510-089 between 2009 and 2013

open access: yesGalaxies, 2018
The blazar PKS 1510-089 has shown intense activity at γ -rays in the recent years. In this work, we discussed the results of our 7 mm radio continuum and optical polarimetric monitoring between 2009 and 2013. In 2009, we detected a large rotation of
Pedro P. B. Beaklini   +2 more
doaj   +1 more source

Jets Downstream of Collisionless Shocks

open access: yesSpace Science Reviews, 2018
The magnetosheath flow may take the form of large amplitude, yet spatially localized, transient increases in dynamic pressure, known as “magnetosheath jets” or “plasmoids” among other denominations.
F. Plaschke   +12 more
semanticscholar   +1 more source

Relativistic Jets Shine through Shocks or Magnetic Reconnection [PDF]

open access: yes, 2015
Observations of gamma-ray-bursts and jets from active galactic nuclei reveal that the jet flow is characterized by a high radiative e ffi ciency and that the dissipative mechanism must be a powerful accelerator of non-thermal particles.
L. Sironi, M. Petropoulou, D. Giannios
semanticscholar   +1 more source

The power of relativistic jets is larger than the luminosity of their accretion disks [PDF]

open access: yesNature, 2014
Theoretical models for the production of relativistic jets from active galactic nuclei predict that jet power arises from the spin and mass of the central supermassive black hole, as well as from the magnetic field near the event horizon.
G. Ghisellini   +8 more
semanticscholar   +1 more source

Flow Pressure Behavior Downstream of Ski Jumps

open access: yesFluids, 2020
Ski jump spillways are frequently implemented to dissipate energy from high-speed flows. The general feature of this structure is to transform the spillway flow into a free jet up to a location where the impact of the jet creates a plunge pool ...
Agostino Lauria   +2 more
doaj   +1 more source

What Drives the Ionized Gas Outflows in Radio-Quiet AGN?

open access: yesGalaxies, 2023
We review the mechanisms driving the ionized gas outflows in radio-quiet (RQ) AGN. Although it constitutes ∼90% of the AGN population, what drives these outflows in these AGNs remains an open question. High-resolution imaging and integral field unit (IFU)
Mainak Singha   +2 more
doaj   +1 more source

Dynamics of Powerful Radio Galaxies

open access: yesGalaxies, 2023
Analytical models describing the dynamics of lobed radio sources are essential for interpretation of the tens of millions of radio sources that will be observed by the Square Kilometre Array and pathfinder instruments.
Ross J. Turner, Stanislav S. Shabala
doaj   +1 more source

Gas–liquid flow field analysis of the compressor vorticity and rotational speed based on NASA Stage 36

open access: yesThe Journal of Engineering, 2018
The aero-engine to be cleaned online can significantly improve compressor performance and increase maintenance intervals, but the cleaning online cannot achieve the anticipated effects due to the lack of cognisance of the internal multiphase flow field ...
Liwen Wang   +4 more
doaj   +1 more source

A Unified Model for Black Hole X-Ray Binary Jets? [PDF]

open access: yes, 2004
We have recently put forward a ‘unified’ semi-empirical model for the coupling between accretion and jet production in galactic black hole X-ray binaries. In this paper, we summarise this model and briefly discuss relevant considerations that have arisen
R. Fender, T. Belloni, E. Gallo
semanticscholar   +1 more source

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