130 citations · 460 across the 9 of their papers we have counts for
9 papers · 1 filter
Dynamics of Turbulent Convection and Convective Overshoot in a Moderate Mass Star
Irina N. Kitiashvili, Alexander G. Kosovichev, Nagi N. Mansour +1
Continued progress in observational stellar astrophysics requires a deep understanding of the underlying convection dynamics. We present results of realistic 3D radiative hydrodyna…
On the role of tachoclines in solar and stellar dynamos
G. Guerrero, P. K. Smolarkiewicz, E. M. de Gouveia Dal Pino +2
Rotational shear layers at the boundary between radiative and convective zones, tachoclines, play a key role in the process of magnetic field generation in solar-like stars. We pre…
Differential rotation in solar-like stars from global simulations
G. Guerrero, P. K. Smolarkiewicz, A. G. Kosovichev +1
To explore the physics of large-scale flows in solar-like stars, we perform 3D anelastic simulations of rotating convection for global models with stratification resembling the sol…
Solar differential rotation: hints to reproduce a near-surface shear layer in global simulations
G. Guerrero, P. K. Smolarkiewicz, A. Kosovichev +1
Convective turbulent motions in the solar interior, as well as the mean flows resulting from them, determine the evolution of the solar magnetic field. With the aim to get a better…
Numerical MHD Simulations of Solar Magnetoconvection and Oscillations in Inclined Magnetic Field Regions
I. N. Kitiashvili, A. G. Kosovichev, N. N. Mansour +1
The sunspot penumbra is a transition zone between the strong vertical magnetic field area (sunspot umbra) and the quiet Sun. The penumbra has a fine filamentary structure that is c…
Excitation of acoustic waves by vortices in the quiet Sun
I. N. Kitiashvili, A. G. Kosovichev, N. N. Mansour +1
Five-minutes oscillations is one of the basic properties of solar convection. Observations show mixture of a large number of acoustic wave fronts propagating from their sources. We…
Mechanism of spontaneous formation of stable magnetic structures on the Sun
I. N. Kitiashvili, A. G. Kosovichev, A. A. Wray +1
One of the puzzling features of solar magnetism is formation of long-living compact magnetic structures; such as sunspots and pores, in the highly turbulent upper layer of the sola…
Signatures of Emerging Subsurface Structures in Acoustic Power Maps
Thomas Hartlep, Alexander G. Kosovichev, Junwei Zhao +1
We show that under certain conditions, subsurface structures in the solar interior can alter the average acoustic power observed at the photosphere above them. By using numerical s…
Explanation of the sea-serpent magnetic structure of sunspot penumbrae
I. N. Kitiashvili, L. R. Bellot Rubio, A. G. Kosovichev +3
Recent spectro-polarimetric observations of a sunspot showed the formation of bipolar magnetic patches in the mid penumbra and their propagation toward the outer penumbral boundary…