5 papers · 1 filter
Solving the discrepancy between the seismic and photospheric solar radius
Margit Haberreiter, Alexander G. Kosovichev, Werner Schmutz
Two methods are used to observationally determine the solar radius: One is the observation of the intensity profile at the limb, the other one uses f-mode frequencies to derive a '…
Properties of high-degree oscillation modes of the Sun observed with Hinode/SOT
U. Mitra-Kraev, A. G. Kosovichev, T. Sekii
Aims. With the Solar Optical Telescope on Hinode, we investigate the basic properties of high-degree solar oscillations observed at two levels in the solar atmosphere, in the G-ban…
Numerical simulation of excitation of solar oscillation modes for different turbulent models
L. Jacoutot, A. G. Kosovichev, A. Wray +1
The goal of this research is to investigate how well various turbulence models can describe physical properties of the upper convective boundary layer of the Sun. An accurate model…
Initial Observations of Sunspot Oscillations Excited by Solar Flare
A. G. Kosovichev, T. Sekii
Observations of a large solar flare of December 13, 2006, using Solar Optical Telescope (SOT) on Hinode spacecraft revealed high-frequency oscillations excited by the flare in the…
Effect of suppressed excitation on the amplitude distribution of 5-min oscillations in sunspots
K. V. Parchevsky, A. G. Kosovichev
Five-minute oscillations on the Sun (acoustic and surface gravity waves) are excited by subsurface turbulent convection. However, in sunspots the excitation is suppressed because s…