Approximately every 11 years the Sun's magnetic field reverses completely - the north magnetic pole changed to south and vice versa. This change coincides with a larger solar activity that we see the sun each cycle, known as "solar maximum". While the cycle evolves with each one seeming regularity ....
11 years, scientists in both studies highlight the asymmetry is in fact this process. Today, the polarity of the sun's north pole appears to have diminished to almost zero - that is, seems to be close in time to convert from magnetic north to the south - but the polarity of the magnetic south pole has just begun to fall.
"Right now, there is an imbalance between the north and south poles," says Jonathan Cirtain, the Marshall Flight Center of NASA, who is head of NASA for a Japanese solar mission called Hinode. «The North is already in a transitional stage, much earlier than the South Pole, and we do not understand why. "
The asymmetry described in studies contradict the models of the sun, which assume that the north and south magnetic pole change simultaneously. Moreover, both agree that change is imminent in the north pole, long before the general prediction that the solar maximum for this cycle will happen in 2013. Finally, direct board Hinode results also demonstrate the need to review some solar models.
The measurement of magnetic activity near the poles is not easy to do because all of our solar telescopes, they see the sun around the equator, offering only a 'skewed' view of the poles when necessary to obtain accurate magnetic measurements. The Hinode can observe the activity on an annual basis with high resolution optical telescope that can map magnetic fields, when observing from near the equator.
newsalamina.net
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