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Astronomers have uncovered the riddle extremely hot blue stars
As an artist, saw the formation of a violation of the passage of the young stars of the old i>
Австралийские astronomers have explained the phenomenon too hot blue stars that have been found in the densely populated stellar clusters. These stars have a very strong brightness - and thus were very very hot. But their weight does not exceed 50% of the mass of the Sun, which does not correspond to their observed temperature.
Most stars fit into the "main sequence" in the diagram mass and temperature - the higher the weight, the more they are heated, and the brighter the light - and the faster the burn. Most of the anomalies, without which does not do any good-looking graph, has explained.
But until now it was not clear the behavior of stars located at the end of the горизонтальной branch diagram, called "blue hook stars." They are not very big and not very bright, but extremely hot. Scientists have suggested that the reason for this was the event that took place in the early stages of their development - and the consequences of this event are shown in millions of years, at the end of life of stars.
The diagram with horizontal branch i>
In the depths of most stars, hydrogen is converted into helium. A blue hook stars, helium is converted into carbon - and for this to be achieved in the core temperature of more than 100 million degrees. In older stars also converts helium, but at temperatures twice smaller than the blue stars hook.
Scientists from the Australian National University, believe that in the process of formation of a star from a gas drive flew past An asterisk other violations made in the drive. As a result, newly formed star is spinning faster than it usually occurs during the formation of stars without external influences. Rapid rotation compensates for the force of gravity, squeezing the star, so it burns hydrogen fuel more slowly, and the process of her life is different from the lives of ordinary stars. These stars are so hot that most of the energy is emitted in the ultraviolet range - in the visible range so they look pretty dull.
A case of flight of foreign stars in star clusters densely populated areas should be relatively long. This is confirmed by ранними research , refutes the view that all the stars in the clusters formed around the same time. In fact, in such clusters, there are several generations of stars - and the older generation of interfering in the formation of the younger ones.
Source: geektimes.ru/post/252508/
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