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'Dark Matter' Origins Of Mysterious Flux Challenged

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posted on Aug, 19 2009 @ 07:06 AM
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Particles As Tracers For Milky Ways Most Massive Explosions: Dark Matter Origins Of Mysterious Flux Challenged.

The search continiues for the origin of dark matter it seems.
They think this shows the the galaxy is slowing down, an hope fully we arent around to see that..
Stars die all the time, yet science say stars gets born too, I havent seen a star been born.


'Dark Matter' Origins Of Mysterious Flux Challenged
ScienceDaily (Aug. 11, 2009) — Astronomers recently observed a mysterious flux of particles in the universe, and the hope was born that this may be the first observation of the remnants of "dark matter".

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.

Supernova remnants

Julia Becker, from the Department of Physics at the University of Gothenburg, and her colleagues show in the article, which has been published in the scientific journal Physical Review Letters, that the mysterious particle flux is the remnant of a supernova, from a star that was 15 times more massive than the sun. This star died and exploded in the Milky Way. 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

Electrons and positrons are accelerated during the process and create a shock-wave, similar to that formed when an aeroplane breaks the sound barrier. Julia Becker and her colleagues show that it is just such a shock-wave that has created the observed particle flux that has astounded scientists.

"This means, I'm afraid, that scientists will have to find another method of identifying dark matter", says Julia Becker.


[edit on 19/8/2009 by ChemBreather]




posted on Aug, 19 2009 @ 11:11 AM
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Dark matter..
What to do with it ??



posted on Aug, 19 2009 @ 11:33 AM
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The only thing we know for sure is that we really have no idea how the Universe really functions. This type of "stretch your brain" science is something I delight in since we are trying to fathom one of the most fascinating and all encompassing mysteries that we are likely ever to encounter.

The proposals for dark matter, dark energy along with the wonderful repartee between string theorists, loop quantum gravity theorists and others demonstrate that modern theoretical physics is in one of it's most creative and innovate phases.

Everytime I see an article like this, I recall a bit of dialogue in a science fiction novel (can't remember the novel though) that went something like this"

"You can't do that. it violates the laws of physics!"
"Not the real laws of physics, but I suppose within those quaint tribal beliefs humans have about how the universe works it might seem so."
"What beliefs are those?"
"Demons, angles, quantum mechanics, relativity; you know, magic and superstition"

Love the post.



 
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