Uncovering the Mystery of Anti-Matter in Our Galaxy

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Discussion Overview

The discussion revolves around the existence and nature of a cloud of antimatter near the center of our galaxy, as reported in an article. Participants explore the implications of this finding, including its origins and the mechanisms of antimatter production.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants note that the article suggests the antimatter is of recent origin, potentially linked to positrons from high-energy gamma-ray reactions (pair production).
  • There is a suggestion that natural antimatter is continuously produced in the universe, making the discovery of a cloud of it less surprising.
  • Questions arise regarding whether the observed phenomenon is a true cloud of antimatter or a cloud of regular matter with sufficient antimatter to produce observable radiation.
  • Participants discuss the process of pair production, where matter-antimatter pairs are generated under high temperatures, and the subsequent interactions between these particles and regular matter.
  • Concerns are raised about how antimatter produced through pair production could be separated from ordinary matter, with some suggesting that the particles move in opposite directions upon creation.

Areas of Agreement / Disagreement

Participants express differing views on the nature of the cloud—whether it is primarily antimatter or a mixture with regular matter. The discussion remains unresolved regarding the specifics of the antimatter's origin and separation from ordinary matter.

Contextual Notes

There are limitations in understanding the mechanisms of antimatter production and separation, as well as the definitions of the terms used in the discussion. The implications of temperature conditions on particle production are also not fully explored.

Tanelorn
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I had not heard of this, so I thought others might be interested.

I thought that all natural Anti matter had been lost at the beginning of the Universe, but apparently there is a 10000 light year cloud of anti matter near the center of our galaxy:

http://www.space.com/4837-source-mysterious-antimatter.html

Any comments?
 
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The article seems to imply that the anti-matter is of recent origin, not from the beginning of the universe. It appears to consist of positrons coming from high energy gamma ray reactions (pair production).
 
Tanelorn said:
I had not heard of this, so I thought others might be interested.

I thought that all natural Anti matter had been lost at the beginning of the Universe, but apparently there is a 10000 light year cloud of anti matter near the center of our galaxy:

http://www.space.com/4837-source-mysterious-antimatter.html

Any comments?

Natural anti-matter is being made constantly in the universe, so it isn't that much of a surprise to find a cloud of it. But an interesting read nonetheless.
 
Hmm, is it a cloud of antimatter or just a cloud of regular matter with enough antimatter to make it glow? How did the antimatter from pair-production get separated from ordinary matter then?
 
clamtrox said:
Hmm, is it a cloud of antimatter or just a cloud of regular matter with enough antimatter to make it glow?

It's not a cloud of pure anti-matter. What happens is that if you heat something hot enough, it will start generating anti-matter/matter pairs. The anti-matter then interacts with the matter and gives you a specific radiation line.

How did the antimatter from pair-production get separated from ordinary matter then?

When you produce an anti-matter/matter pair, the particles go in opposite directions. The anti-matter just continues until it hits some other piece of matter.
 
twofish-quant said:
It's not a cloud of pure anti-matter. What happens is that if you heat something hot enough, it will start generating anti-matter/matter pairs. The anti-matter then interacts with the matter and gives you a specific radiation line.

If the temperature were low enough to only produce electron-positron pairs, then you could separate them by electric or magnetic fields or whatever, but I guess that is not what is happening here.
 

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