Search Publications
Doubts about the crucial role of the rising-tube mechanism in the formation of sunspot groups
Ishikawa, R.; Getling, A. V.; Buchnev, A. A.
Some preliminary processing results are presented for a dataset obtained with the Solar Optical Telescope on the Hinode satellite. The idea of the project is to record, nearly simultaneously, the full velocity and magnetic-field vectors in growing active regions and sunspot groups at a photospheric level. Our ultimate aim is to elaborate observati…
Small-scale magnetic and velocity inhomogeneities in a sunspot light bridge
Louis, Rohan E.
High resolution spectro-polarimetric observations of a sunspot light bridge by Hinode, reveal small-scale inhomogeneities in the magnetic field and velocity. These inhomogeneities arise as a consequence of a weak, secondary lobe in the Stokes V profile which have a polarity opposite that of the sunspot and very large (>5 km s-1) Dopp…
Rotation of sunspots in active region NOAA 10930
Gopasyuk, O. S.
The rotation of sunspots of the active region NOAA 10930 has been investigated using a time series of vector magnetic field maps from the Solar Optical Telescope aboard Hinode. The vertical, radial and azimuthal axisymmetrical components of the magnetic field vector have been reconstructed from the magnetic field line-of-sight component for both s…
A research on the force-freeness of photosphere magnetic field
Hao, J.; Liu, S.
In this paper, the statistical studies on the force-freeness of photosphere magnetic fields are given. The studies are based on the vector magnetic fields observed by Solar Optical Telescope/Spectro-Polarimeter (SOT/SP) on board Hinode. Three parameters (Fx /Fp,Fy /Fp , and Fz /Fp) …
Fine magnetic characteristics of a light bridge observed by Hinode
Liu, D.; Liu, S.
Light bridge (LB) is bright structure crossing the umbra of sunspots and associated to the breakup or assembly of sunspots. In this paper, a LB is presented and studied using the observatory data obtained by Hinode satellites. Force-free factor (α) and the z-component of current (Jz) and tension force (Tz) are calculated basi…