A two-component Bose–Einstein condensate of cold atoms with a strong intercomponent repulsion leading to the spatial separation components has been numerically studied. Configurations multiple quantized vortex in one component, where core is filled other are considered. The effective radius can exceed width transition layer between components, and then an analogy cylindrical classical hydrodyna...

We use the Chandra observation of the cold front in the intracluster gas of A3667 to estimate the magnetic field strength near the front. The front is seen in the Chandra data as a sharp discontinuity in the gas density which delineates a large body of dense cool gas moving with the near-sonic velocity through the less dense, hotter gas. Without a magnetic field, the front should be quickly dis...

The paper deals with a new mechanism of instability in stratified fluid caused by internal wave radiation from a shear layer. This radiation instability may be explained in terms of the negativeenergy wave concept. These waves are able to grow due to radiation losses. The dispersion relation and non-linear stage of the process are analyzed through a model with tangential velocity discontinuity....

The magnetosphere of the Earth and the other planets contain a variety of low frequency (f < fp, fp being the proton gyrofrequency) waves. Several sources are known to contribute to these uctuations: (1) Waves present in the solar wind (mainly those occurring in the foreshock) are convected in the magnetosheath and possibly ampli ed passing through the shock front. (2) The bow shock modi es the...

Velocities close to the speed of light are a robust observational property of the jets observed in microquasars and AGNs, and are expected to be behind much of the phenomenology of GRBs. Yet, the mechanism boosting relativistic jets to such large Lorentz factors is still essentially unknown. Building on recent general-relativistic, multidimensional simulations of progenitors of short GRBs, we d...

Conditions under which compression occurs and collective expansion develops in energetic symmetric reactions of heavy nuclei, are analyzed, together with their effects on emitted light baryons and pions. Within transport simulations, it is shown that shock fronts perpendicular to beam axis form in head-on reactions. The fronts separate hot compressed matter from normal and propagate into projec...

We investigate localization in granular material with the support of numerical simulations based upon DEM (Distinct Element Method). Localization is associated a discontinuity component incremental strain over plane surface through condition determinant acoustic tensor to be zero. are carried out on an aggregate elastic frictional spheres, initially isotropically compressed and then sheared at ...

Teleseismic recordings of direct S and sS body wave phases, and their core-reflected counterparts ScS and sScS, from intermediate and deep focus earthquakes are used to analyze the lowermost mantle shear velocity structure beneath Alaska. A model with a 2.75 % shear velocity increase 280 km above the core-mantle boundary accurately matches waveform complexities in both the S and sS wavetrains. ...

For some coronal mass ejections (CMEs), their interaction with the ambient solar wind can produce a forward-reverse shock pair. The high-speed mass ejecta compresses the plasma near the top of the CME on both sides of the tangential discontinuity which separates the CME plasma from the ambient solar wind plasma. The front of the compressed CME plasma propagates in the reverse direction relative...