Astronomers from the United States opened a 25 "mini-supernova"


27/03/2013

A new type of supernova was discovered by American astronomers. Outbreaks of these stars are so weak that they could be called a "mini-supernova", according to officials of the Harvard-Smithsonian Center for Astrophysics.

Usually, there are two main types of supernovae, as the researchers note. Flash Type II supernova occurs when a very fast compression of the core single star, whose mass reaches 10 to 100 solar masses. In binary systems arise supernovae type I, to this class as are the so-called "Nobel Prize" supernovae of type Ia, produced from old already burned low mass stars, which do not have their own sources of energy - White dwarfs.

The study of Type Ia supernovae astronomers Saul Perlmutter, Adam Riess and Brian Schmidt brought the Nobel Prize in Physics in 2011. Research team Ryan Foley (Ryan Foley) in the Harvard-Smithsonian Center for Astrophysics have found a new, more weak and more "pale" variety of supernovae of type Ia. These supernovae, called scientists Iax, are also associated with white dwarfs, and so far only found by scientists in a relatively young stellar systems. Article scientists will be published in the journal Astrophysical Journal.

Creation of a "mini-supernova," apparently occurs in binary systems consisting of a white dwarf and a companion star, which lost in the outer shell of a hydrogen. How exactly the launching of the mechanism of a supernova explosion type Iax is not yet clear, but in contrast to the type Ia, as scientists believe, with this outbreak in most cases, the white dwarf can "survive."

To date, Foley and his colleagues found only 25 "mini-supernova," even though, according to their calculations, one such supernova have for every three "Nobel". These stars are more difficult to detect, as the weakest of them fainter than type Ia 100. Scientists hope that the currently projected megateleskop Large Synoptic Survey Telescope (LSST) in Chile will be able to find work during the "thousands" of supernovae Iax.


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