591 citations · 4.7k across the 90 of their papers we have counts for
27 papers · 1 filter
Analog of Astrophysical Magnetorotational Instability in a Couette-Taylor Flow of Polymer Fluids
Stanislav Boldyrev, Don Huynh, Vladimir Pariev
We report experimental observation of an instability in a Couette-Taylor flow of a polymer fluid in a thin gap between two coaxially rotating cylinders in a regime where their angu…
Amplification of magnetic fields by dynamo action in Gaussian-correlated helical turbulence
Leonid Malyshkin, Stanislav Boldyrev
We investigate the growth and structure of magnetic fields amplified by kinematic dynamo action in turbulence with non-zero kinetic helicity. We assume a simple Gaussian velocity c…
Magnetic dynamo action in astrophysical turbulence
Leonid Malyshkin, Stanislav Boldyrev
We investigate the structure of magnetic field amplified by turbulent velocity fluctuations, in the framework of the kinematic Kazantsev-Kraichnan model. We consider Kolmogorov dis…
Role of cross helicity in magnetohydrodynamic turbulence
Jean C Perez, Stanislav Boldyrev
Strong incompressible three-dimensional magnetohydrodynamic turbulence is investigated by means of high resolution direct numerical simulations. The simulations show that the confi…
On weak and strong magnetohydrodynamic turbulence
Jean Carlos Perez, Stanislav Boldyrev
Recent numerical and observational studies contain conflicting reports on the spectrum of magnetohydrodynamic turbulence. In an attempt to clarify the issue we investigate anisotro…
Magnetic dynamo action in helical turbulence
Leonid Malyshkin, Stanislav Boldyrev
We investigate magnetic field amplification in a turbulent velocity field with nonzero helicity, in the framework of the kinematic Kazantsev-Kraichnan model. We present the numeric…
Numerical Measurements of the Spectrum in Magnetohydrodynamic Turbulence
Joanne Mason, Fausto Cattaneo, Stanislav Boldyrev
We report the results of an extensive set of direct numerical simulations of forced, incompressible, magnetohydrodynamic turbulence with a strong guide field. The aim is to resolve…
Dynamic Alignment and Exact Scaling Laws in MHD Turbulence
Stanislav Boldyrev, Joanne Mason, Fausto Cattaneo
Magnetohydrodynamic (MHD) turbulence is pervasive in astrophysical systems. Recent high-resolution numerical simulations suggest that the energy spectrum of strong incompressible M…
Dynamic Alignment in Driven Magnetohydrodynamic Turbulence
Joanne Mason, Fausto Cattaneo, Stanislav Boldyrev
Motivated by recent analytic predictions, we report numerical evidence showing that in driven incompressible magnetohydrodynamic turbulence the magnetic- and velocity-field fluctua…
Turbulent Origin of the Galactic-Center Magnetic Field: Nonthermal Radio Filaments
Stanislav Boldyrev, Farhad Yusef-Zadeh
A great deal of study has been carried out over the last twenty years on the origin of the magnetic activity in the Galactic center. One of the most popular hypotheses assumes mill…
Spectrum of magnetohydrodynamic turbulence
Stanislav Boldyrev
We propose a phenomenological theory of strong incompressible magnetohydrodynamic turbulence in the presence of a strong large-scale external magnetic field. We argue that in the i…
Magnetic-field generation in helical turbulence
Stanislav Boldyrev, Fausto Cattaneo, Robert Rosner
We investigate analytically the amplification of a weak magnetic field in a homogeneous and isotropic turbulent flow lacking reflectional symmetry (helical turbulence). We propose…
Non-Gaussian Radio-Wave Scattering in the Interstellar Medium
Stanislav Boldyrev, Arieh Konigl
It was recently suggested by Boldyrev & Gwinn that the characteristics of radio scintillations from distant pulsars are best understood if the interstellar electron-density fluctua…
Radio-wave propagation in the non-Gaussian interstellar medium
Stanislav Boldyrev, Carl R. Gwinn
Radio waves propagating from distant pulsars in the interstellar medium (ISM), are refracted by electron density inhomogeneities, so that the intensity of observed pulses fluctuate…
On magnetic field generation in Kolmogorov turbulence
Stanislav Boldyrev, Fausto Cattaneo
We analyze the initial, kinematic stage of magnetic field evolution in an isotropic and homogeneous turbulent conducting fluid with a rough velocity field, v(l) ~ l^alpha, alpha<1.…
Levy model for interstellar scintillations
Stanislav Boldyrev, Carl R. Gwinn
Observations of radio signals from distant pulsars provide a valuable tool for investigation of interstellar turbulence. The time-shapes of the signals are the result of pulse broa…
Structure Function Scaling in Compressible Super-Alfvenic MHD Turbulence
Paolo Padoan, Raul Jimenez, Aake Nordlund +1
Supersonic turbulent flows of magnetized gas are believed to play an important role in the dynamics of star-forming clouds in galaxies. Understanding statistical properties of such…
Extending the Shakura-Sunyaev approach to a strongly magnetized accretion disc model
V. I. Pariev, E. G. Blackman, S. A. Boldyrev
We develop a model of thin turbulent accretion discs supported by magnetic pressure of turbulent magnetic fields. This applies when the turbulent kinetic and magnetic energy densit…
Structure Function Scaling in the Taurus and Perseus Molecular Cloud Complexes
Paolo Padoan, Stanislav Boldyrev, William Langer +1
We compute the structure function scaling of the integrated intensity images of two J=1-0 13CO maps of Taurus and Perseus. The scaling exponents of the structure functions follow t…
Scintillations and Levy flights through the interstellar medium
Stanislav Boldyrev, Carl Gwinn
Temporal broadening of pulsar signals results from electron density fluctuations in the interstellar medium that cause the radiation to travel along paths of different lengths. The…
Interstellar Scintillation of PSR J0437-4715 on Two Scales
C. R. Gwinn, C. Hirano, S. Boldyrev
We sought to determine the scale of scintillation in the interstellar plasma of PSR J0437-4715. We used the Very Long Baseline Array to obtain scintillation amplitude and phase dat…
Supersonic turbulence and structure of interstellar molecular clouds
Stanislav Boldyrev, Aake Nordlund, Paolo Padoan
The interstellar medium (ISM) provides a unique laboratory for highly supersonic, driven hydrodynamics turbulence. We present a theory of such turbulence, confirm it by numerical s…
Scaling relations of supersonic turbulence in star-forming molecular clouds
Stanislav Boldyrev, Aake Nordlund, Paolo Padoan
We present a direct numerical and analytical study of driven supersonic MHD turbulence that is believed to govern the dynamics of star-forming molecular clouds. We describe statist…
Kolmogorov-Burgers Model for Star Forming Turbulence
Stanislav Boldyrev
The process of star formation in interstellar molecular clouds is believed to be controlled by driven supersonic magnetohydrodynamic turbulence. We suggest that in the inertial ran…