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Browsing by Author "Kitiashvili I."

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Dynamics of magnetized vortex tubes in the solar chromosphere

Kitiashvili I.; Kosovichev A.; Mansour N.; Wray A. (2012)

We use three-dimensional radiative MHD simulations to investigate the formation and dynamics of small-scale (less than 0.5 Mm in diameter) vortex tubes spontaneously generated by turbulent convection in quiet-Sun regions ...
Inner core wobble and free core nutation of pulsar PSR B1828-11

Kitiashvili I.; Gusev A. (2008)

PSR B1828-11 has long-term, highly periodic and correlated variations in pulse shape and a slow-down rate with period variations of approximately 1000, 500 and 250 days [Stairs, I.H., Lyne, A.G., Shemar, S.L. Evidence for ...
Long-period variations of pulsar emission and the dynamical ellipticity of neutron stars

Kitiashvili I.; Gusev A. (2008)

Assuming that the observed periodic variations of pulsar emission are due to the free precession of the spin axis, we investigate the evolution of the rotation of a two-layer neutron star using the Hamiltonian method of ...
Mechanisms of formation ofsolar pores and sunspots

Kitiashvili I. (2012)

Spontaneous formation of self-organized magnetic structures, such as sunspots and pores, is one of intriguing and oldest problems, which represents a complicated interaction of convection and magnetic fields on different ...
Modeling of evolution of the rotational axis of "hot Jupiter" planets under tidal perturbations

Kitiashvili I. (2007)

In this report, we present results of analytical and numerical calculations of evolution the axis of rotation of planets moving at very close orbits. We consider the evolution of the axis of rotation caused by tidal ...
Radiative hydrodynamic simulations of turbulent convection and pulsations of Kepler target stars

Kitiashvili I. (2014)

The problem of interaction of stellar pulsations with turbulence and radiation in stellar convective envelopes is central to our understanding of excitation mechanisms, oscillation amplitudes and frequency shifts. Realistic ...
Rotational evolution of exoplanets under the action of gravitational and magnetic perturbations

Kitiashvili I.; Gusev A. (2008)

We investigate the evolution of the rotational axes of exoplanets under the action of gravitational and magnetic perturbations. The planet is assumed to be dynamically symmetrical and to be magnetised along its dynamical-symmetry ...
Rotational evolution of planetary systems under the action of gravitational and magnetic perturbations

Kitiashvili I.; Gusev A. (2010)

Dynamics of planets around other stars that demonstrate a variety of possible characteristics is of interest from the point of view of realization of new scenarios of evolution which have not been realized in the Solar ...
Turbulent kinetic energy spectra of solar convection from New Solar Telescope observations and realistic magnetohydrodynamic simulations

Kitiashvili I.; Abramenko V.; Goode P.; Kosovichev A.; Lele S.; Mansour N.; Wray A.; Yurchyshyn V. (2013)

Turbulent properties of the quiet Sun represent the basic state of surface conditions and a background for various processes of solar activity. Therefore, understanding the properties and dynamics of this 'basic' state is ...
Ubiquitous solar eruptions driven by magnetized vortex tubes

Kitiashvili I.; Kosovichev A.; Lele S.; Mansour N.; Wray A. (2013)

The solar surface is covered by high-speed jets transporting mass and energy into the solar corona and feeding the solar wind. The most prominent of these jets have been known as spicules. However, the mechanism initiating ...
Vortex tubes of turbulent solar convection

Kitiashvili I.; Kosovichev A.; Mansour N.; Lele S.; Wray A. (2012)

The investigation of the turbulent properties of solar convection is important for understanding the multi-scale dynamics observed on the solar surface. In particular, recent high-resolution observations have revealed ...

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Browsing by Author "Kitiashvili I."

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