In the solar corona was first observed magnetic "Spit"


25/01/2013

The first time scientists could make out in the solar corona delicate structures or so-called "Spit", by which the temperature is increased up to a million degrees, reported a team of researchers based on the results of the experiment suborbital Hi-C in an article published in the journal Nature.

For a long time, the high temperature in the upper layer of the solar atmosphere - the corona - remained a mystery to astrophysicists. The temperature of the chromosphere and photosphere - more than the lower layers of the sun reaches tens of thousands of degrees Kelvin. The temperature between the photosphere and the corona (in the boundary layer thickness of a few kilometers) up to several million degrees.

The energy required to heat up, according to one hypothesis, builds up and is released into the intertwined magnetic flux tubes, which are woven, combine and break up. Forming the so-called "magnetic mat" structure is very small, and still see how they did not exist.

NASA and the Russian Lebedev Physical Institute (LPI) in July 2012 conducted a joint experiment Hi-C (High Resolution Coronal Imager), provides for the launch of an ultraviolet telescope on a suborbital rocket weather. At obtained through this telescope images scientists first spotted on the Sun details of about 150 kilometers, given that for the best solar telescope is typical resolution no higher than 900 kilometers. After processing the images they obtained evidence that this "magnetic carpet" actually exists.

"We were able to see for the first time thin magnetic structures that are able to weave that can store energy and release it. Energy that is stored up in them, then corresponds to the energy needed to heat the corona," - said co-director of the experiment Hi-C of the Lebedev Physical Institute, Sergei richer.


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