A new study published in the journal Nature revealed why the Sun's corona temperatures does hundreds of times higher than parts of the star that are closer to the core produces heat.
According to Scott McIntosh and other researchers from U.S. National Center for Atmospheric Research, it takes energy to heat the solar corona to high temperatures, which reach millions of degrees and also to accelerate the solar wind going in the direction of the Earth.
In the corona, the temperature reaches about two or three million degrees, but the Sun's surface reaches about six thousand degrees. But they have not explained is why the corona, which is farther from the nucleus where it generates the heat is hotter.
According to the Swedish physicist Hannes Alfven, there are waves that carry energy from the magnetic field lines running through the plasma corona.
Ultraviolet high-definition images worked for a NASA observatory McIntosh allowed the team to detect large number of these waves, called Alfven.
These waves "are able to provide the energy needed to propel the fast solar wind and thus compensate for heat losses from the troubled regions of the solar corona," believe those who worked with the study.
However, this "is not sufficient to provide the 2,000 watts per square meter needed to supply the active areas of the crown," they say in the journal Nature.
We should also "understand how and where they generate and dissipate these waves in the solar atmosphere."
http://www.aimdigital.com.ar/aim/2011/07/31/estudio-revela-misterio-del-calor-en-la-corona-del-sol/
According to Scott McIntosh and other researchers from U.S. National Center for Atmospheric Research, it takes energy to heat the solar corona to high temperatures, which reach millions of degrees and also to accelerate the solar wind going in the direction of the Earth.
In the corona, the temperature reaches about two or three million degrees, but the Sun's surface reaches about six thousand degrees. But they have not explained is why the corona, which is farther from the nucleus where it generates the heat is hotter.
According to the Swedish physicist Hannes Alfven, there are waves that carry energy from the magnetic field lines running through the plasma corona.
Ultraviolet high-definition images worked for a NASA observatory McIntosh allowed the team to detect large number of these waves, called Alfven.
These waves "are able to provide the energy needed to propel the fast solar wind and thus compensate for heat losses from the troubled regions of the solar corona," believe those who worked with the study.
However, this "is not sufficient to provide the 2,000 watts per square meter needed to supply the active areas of the crown," they say in the journal Nature.
We should also "understand how and where they generate and dissipate these waves in the solar atmosphere."
http://www.aimdigital.com.ar/aim/2011/07/31/estudio-revela-misterio-del-calor-en-la-corona-del-sol/