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Effect of the meridional velocity gradient on the anisotropy of turbulence in the solar wind
Erofeev, D. V.
In this paper, the heliolatitude dependence of the anisotropy of hourly interplanetary magnetic field fluctuations under conditions characteristic of low solar activity is studied. Measurements carried out by the Ulysses spacecraft in 1992–1994 and 1995–1997 are analyzed. It is found that the minimum fluctuation variance axis has a significant til…
The vorticity of Solar photospheric flows on the scale of granulation
Pevtsov, A. A.
We employ time sequences of images observed with a G-band filter (λ4305Å) by the Solar Optical Telescope (SOT) on board of Hinode spacecraft at different latitude along solar central meridian to study vorticity of granular flows in quiet Sun areas during deep minimum of solar activity. Using a feature correlation tracking (FCT) technique, we calcu…
Observations of long-period oscillations of the solar active regions in the visible and UV spectral intervals
Tlatov, A. G.; Dormidontov, D. V.; Chernov, Ya. O.
The variation of intensity in spectral line wings, which was obtained from observations of the patrol telescope at the Kislovodsk Mountain Astronomical Station of the Pulkovo Observatory, Russian Academy of Science (KMAS) and the Interface Region Imaging Spectrograph (IRIS) space observatory, are considered. A series of observations lasting a few …