But scientists from the University of Gothenburg, Sweden, have shown that there is another explanation of the flux.
Several independent studies recently discovered a mysterious flux of electrons and positrons in the universe. Several theories were presented that suggested that these particles arise from the decay of "dark matter" - the hypothetical material that is believed to influence the rotation of galaxies.
Dark matter is one of the most challenging questions in astrophysics. An international research group with members from the University of Gothenburg has now published new results showing that the mysterious flux actually arises from exploding stars.
When a star of this mass dies, most of its material is ejected and ploughs a pathway through a massive, stellar wind. This wind has been created earlier in the death process, when the star lost part of its original mass. The wind blows away from the star, and the final definitive explosion of the star then drives new material through the previously established wind.A shock-wave in space
"This means, I'm afraid, that scientists will have to find another method of identifying dark matter", says Julia Becker.
The article Cosmic Ray Electrons and Positrons from Supernova Explosions of Massive Stars was published in Physical Review Letters on 7 August.
Helena Aaberg | idw
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