National Astronomical Observatory of Japan

Polar Field Reversal as Observed with Hinode

| Science

An international research team consisting mainly of researchers from NAOJ and RIKEN are regularly conducting magnetic field observation in the solar polar region with the Solar Optical Telescope (SOT) mounted on the Solar Observation Satellite “Hinode.” For the first time in the world, they recently discovered the phenomenon of the polarity of the polar magnetic field reversing faster than normal. This discovery was brought about by the SOT's high spatial resolution and high-precision polarimetry, and the long-term operation steadily conducted via the “Hinode” satellite.