The stellar core formation and high speed jets driven by the formed core are studied by using three-dimensional resistive magnetohydrodynamical (MHD) nested grid simulations. Starting with a Bonnor-Ebert isothermal cloud rotating in a uniform magnetic field, we calculate the cloud evolution from the molecular cloud core (nc = 10 6 cm, rc = 4.6×10 4 AU) to the stellar core (nc ≃ 10 23 cm, rc ≃ 1...

We re-analyse the resonant spin–flavour (RSF) solutions to the solar neutrino problem in the framework of analytic solutions to the solar magneto-hydrodynamics (MHD) equations. By substantially eliminating the arbitrariness associated to the magnetic field profile due to both mathematical consistency and physical requirements we propose the simplest scheme (MHD-RSF, for short) for solar neutrin...

Considering the magneto-hydrodynamic equations in a non-relativistic multi uid framework, we study the behavior of small amplitude perturbations in cold quark matter. Magneto-hydrodynamic equations, along with a suitable equation of state for the cold quark matter, are expanded using the reductive perturbation method. It is shown that in small amplitude approximation, such a medium should be co...

This comparative research investigates the influence of a flexible magnetic flux and chemical change on freely fluid motion (MHD) magneto hydrodynamic boundary layer incompressible nanofluid across an exponentially expanding sheet. Water ethanol are used for this analysis. The temperature transmission improvement fluids is described using Buongiorno model, which includes Brownian movement therm...

In this work we introduce a novel semi-implicit structure-preserving finite-volume/finite-difference scheme for the viscous and resistive equations of magnetohydrodynamics (MHD) based on an appropriate 3-split governing PDE system, which is decomposed into first convective subsystem, second subsystem involving coupling velocity field with magnetic third pressure-velocity coupling. The nonlinear...

Multidimensional modeling of phenomena and processes occurring during the expansion laser-produced plasma for different irradiation conditions related to both laser beam parameters target constructions is a very complex issue, especially when requires consideration kinetic associated with development various types microscopic instability. PIC codes create such possibility, but their use limited...

The theory of the formation first stars in Universe, so-called Population III (Pop III), has until now largely neglected impact magnetic fields. Complementing a series recent studies magneto-hydrodynamic (MHD) aspects Pop star formation, we here carry out suite idealized numerical experiments where ascertain how fragmentation properties primordial protostellar discs are modified if MHD effects ...

Recent VLBI monitoring has found transverse motions of the M87 jet. However, due to limited cadence previous observations, details motion have not been fully revealed yet. We regularly monitored jet at KVN and VERA Array (KaVA) 22 GHz from December 2013 June 2016. The average time interval observation is ∼0.1 year, which suitable for tracking short-term structural changes. From these well repre...

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Most numerical investigations on the role of magnetic fields in turbulent molecular clouds (MCs) are based on ideal magneto-hydrodynamics (MHD). However, MCs are weakly ionized, so that the time scale required for the magnetic field to diffuse through the neutral component of the plasma by ambipolar diffusion (AD) can be comparable to the dynamical time scale. We have performed a series of 256 ...