Observations with the
infrared Herschel Space Telescope discovered the star Alpha Centauri A strange
"cold bed", exactly the same as that of our sun.
Our star is composed of
six layers: the core, where fusion reactions occur, areas of radioactive
transfer, convective zone, photosphere, chromospheres and corona.
The
temperature in the center of the nucleus - 14 million K, while at the surface
(at the outer edge of the convection zone) and the temperature of the
photosphere is only between 4-7 thousand K but the temperature of the chromospheres
increases with altitude from 4000 to 20,000 K, and the temperature of the
corona is an average of 1-2 million K, and in some areas up to 8 or even 20
million K.
Such a high temperature
of the corona, astronomers tend to explain the influence of magnetic fields,
which, in particular, produce coronal mass ejections and solar flares.
Observations of Alpha
Centauri A are thought to help to better understand this phenomenon. The fact
that the star is in fact a twin of the Sun: the size, mass, chemical
composition, and even the age of these stars are very similar to each other,
although in contrast to the Sun - Single Star - Alpha Centauri A is a triple
star system.
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