We have investigated the generation of magnetic fields associated with velocity shear between an unmagnetized relativistic jet and an unmagnetized sheath plasma. We have examined the strong magnetic fields generated by kinetic shear (Kelvin–Helmholtz) instabilities. Compared to the previous studies using counter-streaming performed by Alves et al. (2012), the structure of the kinetic K lvin– He...

We present unpublished Spitzer IRAC observations of the HH 1/2 young stellar outflow processed with a high angular resolution deconvolution algorithm , that produces sub-arcsecond (∼ 0.6 0.8′′) images. In the resulting mid-infrared images, the optically invisible counterjet is detected for the first time. The counterjet is approximately half as bright as the jet at 4.5μm (the IRAC band that bes...

Aims. The theoretical model for magnetohydrodynamic (MHD) modes guided by a field-aligned plasma cylinder with a steady flow is adapted to interpret transverse waves observed in solar coronal hot jets, discovered with Hinode/XRT in terms of fast magnetoacoustic kink modes. Methods. Dispersion relations for linear magnetoacoustic perturbations of a plasma jet of constant cross-section surrounded...

We consider the case, in QCD, of a single jet propagating within strongly interacting fluid, finite extent. Interactions lead to appearance source energy-momentum fluid. The remnant that escapes container is analyzed along with portions medium excited by jet. study effect static versus semi-realistic expanding medium, jets traveling inward outward. response via recoils partonic scatterings base...

Measurement of the (3)Pi-(3)Pi transition of C(6)H(+) in the gas phase near 19486 cm(-1) is reported. The experiment was carried out with a supersonic slit-jet expansion discharge using cavity ringdown absorption spectroscopy. Partly resolved P lines and observation of band heads permitted a rotational contour fit. Spectroscopic constants in the ground and excited-state were determined. The den...

Introduction The lithium beam diagnostic provides a powerful edge plasma diagnostic. It enables the determination of electron density profiles in the scrape-of-layer and pedestal region with high spatial and temporal resolution (∆t ≈ 50ms, ∆x ≈ 1cm). A fast neutral lithium beam (beam energy at JET: 55 keV) is injected into the plasma and the line radiation emitted by the collisionally excited l...

The dynamic response of a confined, premixed turbulent jet flame is investigated at high thermal power densities (∼25 MW/m2/bar) and turbulence levels (Rejet∼ 5 ×105). As equivalence ratio inlet velocity are varied these conditions, multiple instability modes coexist: low-amplitude (p′/pC≲ 9%) with longitudinal-mode fluctuations (1L 2L) two high-amplitude 20%), high-frequency, transverse modes....

We report the results of Hubble Space Telescope NICMOS and WFPC2 imaging of emission-line nebulae in the central galaxies of three clusters of galaxies purported to host massive cooling flows, Perseus (NGC1275), Abell 2597, and PKS0745-191. The spectral signature of vibrationally-excited molecular hydrogen has been seen in every galaxy searched thus far that is central to a cluster cooling flow...