Comparing Matter & Antimatter Suns

In summary, matter and anti-matter have almost identical properties, making it difficult to distinguish between them. However, the weak interaction and certain decays can reveal differences, and there is evidence of anti-matter on the sun and in lightning. An anti-matter star would look the same as a regular matter star, but its interaction with the interstellar medium could cause interesting effects.
  • #1
cosmicpencil
25
0
what is the difference between antimatter sun and a matter one, thanks.
 
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  • #2
From a distance, nothing
As far as we know (almost) all nuclear reactions, physical laws and chemistry is identical for matter and anti-matter.
Unless matter came into contact with the sun you wouldn't know
 
  • #3
Dosent the gama ray ration differs?

Could this kind of sun permit life?, thanks.
 
  • #4
I think the neutrino/anti-neutrino ratio would be different if the Sun were made of antimatter. The "missing solar neutrinos" problem was the focus of neutrino research for a while. Also, the solar wind (slow proton plasmas) would be antimatter, which would have been detected by now.
Bob S
 
  • #5
Depends wether the question is, would we know if our sun was anti-matter - then yes very definitely.
If they meant could an anti-earth go around an anti-sun in a distant anti-galaxy, then yes.
 
  • #6
Could there be "humans" made of antimatter and be excactly equal to us in every aspect?
 
  • #7
tataraperz said:
Could there be "humans" made of antimatter and be excactly equal to us in every aspect?

Yes, there could. However there probably isn't enough antimatter in this Universe concentrated sufficiently to make an antimatter star with planets - matter out numbers antimatter about 1 billion or so to 1. Thus antimatter is spread out too thinly to meet up with other antimatter.

However cosmic rays do make some when they collide with regular matter - their relativistic energy gets turned into equal amounts of matter and antimatter. A magnetic field can split the two kinds of matter up and some antimatter can collect in the magnetospheres of the big planets. Perhaps a few micrograms or so. We could gather enough antihydrogen to make a snow-flake perhaps.
 
  • #8
Bob S said:
I think the neutrino/anti-neutrino ratio would be different if the Sun were made of antimatter. The "missing solar neutrinos" problem was the focus of neutrino research for a while. Also, the solar wind (slow proton plasmas) would be antimatter, which would have been detected by now.
Bob S

I think this is a really interesting topic, I read at the link below that there is in fact antimatter on the sun and in its flares (was published in 2003).

http://www.nasa.gov/vision/universe/solarsystem/rhessi_antimatter.html

Kind of related, I wanted to ask, are both the sun and Earth in the Orion arm for certain?
 
  • #9
Bob S said:
I think the neutrino/anti-neutrino ratio would be different if the Sun were made of antimatter. The "missing solar neutrinos" problem was the focus of neutrino research for a while. Also, the solar wind (slow proton plasmas) would be antimatter, which would have been detected by now.

The signature of anti-matter is 511 kev Gamma rays.

Which have been detected in lighting

http://news.nationalgeographic.com/news/2011/01/110111-thunderstorms-antimatter-beams-fermi-radiation-science-space/
 
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  • #10
twofish-quant said:
The signature of anti-matter is 511 kev Gamma rays.

Which have been detected in lighting

http://news.nationalgeographic.com/news/2011/01/110111-thunderstorms-antimatter-beams-fermi-radiation-science-space/

Whoa 100 trillion positrons, this just happened and I guess it hit their spacecraft twice? Thought that might knock out all the electronics, wow, what a coincidence that it was over Egypt too!

Could it be that a lowt amount of positrons are always meeting with Earth's electrons, but when lightning happens, there is simply more antimatter present?

Either way, I think the baryon asymmetry theory might start changing. Thanks for sharing this, good find.
 
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  • #11
Imagine an antimatter rogue star plowing its way through a thick regular matter dust and/or predominantly hydrogen cloud. Harmless fireworks galore? Or the eventual disintegration of the star itself? Of course dust cloud density and duration of the passage have to be taken into consideration.
 
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  • #12
supergalactic said:
Whoa 100 trillion positrons, this just happened and I guess it hit their spacecraft twice? Thought that might knock out all the electronics,

The total amount of energy released by the anihlation of that many positrons equals ~16 joules, or the amount of energy a 100w light bulb uses in 1/6 sec.
 
  • #13
supergalactic said:
Whoa 100 trillion positrons, this just happened and I guess it hit their spacecraft twice? Thought that might knock out all the electronics, wow, what a coincidence that it was over Egypt too!
What does being "over Egypt" have to do with any thing?

Could it be that a lowt amount of positrons are always meeting with Earth's electrons, but when lightning happens, there is simply more antimatter present?
No, lightning has nothing to do with "anti-matter".

Either way, I think the baryon asymmetry theory might start changing. Thanks for sharing this, good find.
 
  • #14
The macroscopic properties of an antimatter object are identical to those of its corresponding ordinary-matter object, with the exception of sign changes for electric charges and related quantities. Thus, an antimatter star would look exactly like an ordinary-matter one.

The weak interaction, however, violates charge symmetry (C), meaning that one can detect matter-antimatter asymmetry with it. It also violates parity symmetry (P), meaning that one can distinguish a reaction from its mirror image. But they conserve C and P together (CP), meaning that if one does not have some direction references, like the directions of distant stars and galaxies, one won't be able to tell ordinary matter from antimatter.

However, weak-interaction parity violation mostly affects of the directions of particles' spins, so it's VERY hard for it to have a measurable macroscopic effect.

All is not lost, however. Some decays of some mesons are known to violate CP, notably certain decays of neutral kaons. These can be used to distinguish ordinary matter and antimatter -- which way do the asymmetries go?
 
  • #15
Radrook said:
Imagine an antimatter rogue star plowing its way through a thick regular matter dust and/or predominantly hydrogen cloud. Harmless fireworks galore? Or the eventual disintegration of the star itself? Of course dust cloud density and duration of the passage have to be taken into consideration.

I smell a test question for an intro astronomy class!
 
  • #16
It should be easy to get rough estimates. The star will almost certainly be producing a stellar wind, and it will likely react with the interstellar medium before it reaches the star's photosphere. Where it reacts is another story; one will have to be careful about collision cross sections and mean free paths, however.

One also has to watch out for what happens when particles and antiparticles meet each other -- what they leave behind as they annihilate. Electrons and positrons will make gamma rays, and nucleons and antinucleons mostly pions. I say "nucleons", because protons and antineutrons can annihilate, as can antiprotons and neutrons. Pions are strongly interacting, and they will not travel very far in a nucleus. So an antiproton or an anti-alpha hitting a nucleus (or its matter-antimatter reversal) will cause the nucleus to fission or even disintegrate.
 
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  • #17
HallsofIvy said:
What does being "over Egypt" have to do with any thing?

Egypt is like the hotspot of phenomenons and ancient science...
HallsofIvy said:
No, lightning has nothing to do with "anti-matter".

hmm...check this article...

http://www.ens-newswire.com/ens/jan2011/2011-01-18-01.html

and this one...

http://news.nationalgeographic.com/news/2011/01/110111-thunderstorms-antimatter-beams-fermi-radiation-science-space/

Direct quote - "But the lightning flash detected by Fermi appeared to have produced about 100 trillion positrons: "That's a lot," he said"

Looks like it does have something to do with anti-matter.
 
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  • #18
Electric-potential differences can be huge -- they can go to 100 million volts or more. That's more than enough to produce electron-positron pairs.
 

Related to Comparing Matter & Antimatter Suns

1. What is the difference between matter and antimatter suns?

Matter and antimatter are essentially identical except for the opposite electrical charges they carry. While matter has a positive charge, antimatter has a negative charge. This difference in charge causes matter and antimatter to annihilate each other when they come into contact, releasing large amounts of energy in the form of gamma rays.

2. How are matter and antimatter suns created?

Both matter and antimatter suns are created through the process of nuclear fusion, where smaller particles combine to form larger particles. However, matter suns are primarily created through natural processes such as the fusion of hydrogen atoms in stars, while antimatter suns are artificially created in particle accelerators.

3. What are the potential applications of studying matter and antimatter suns?

Studying matter and antimatter suns can provide valuable insights into the fundamental laws of physics, as well as the origins and evolution of the universe. Additionally, the energy released from the annihilation of matter and antimatter can potentially be harnessed for advanced propulsion systems and energy production.

4. Can matter and antimatter suns coexist in the same space?

No, matter and antimatter suns cannot coexist in the same space as they would immediately annihilate each other upon contact. This is why antimatter is not found in large quantities in the universe and is difficult to study.

5. Are there any known matter or antimatter suns in our universe?

While there are many known matter suns in our universe, there is currently no evidence of any existing antimatter suns. However, scientists believe that small amounts of antimatter may exist in the form of cosmic rays or in the aftermath of high-energy collisions.

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