Scientists solve mystery of how most antimatter in the Milky Way forms

Scientists solve mystery of how most antimatter in the Milky Way forms
Credit: Australian National University

A team of international astrophysicists led by The Australian National University (ANU) has shown how most of the antimatter in the Milky Way forms.

Antimatter is material composed of the antiparticle partners of ordinary matter – when antimatter meets with matter, they quickly annihilate each other to form a burst of energy in the form of gamma-rays.

Scientists have known since the early 1970s that the inner parts of the Milky Way galaxy are a strong source of gamma-rays, indicating the existence of antimatter, but there had been no settled view on where the antimatter came from.

ANU researcher Dr Roland Crocker said the team had shown that the cause was a series of weak supernova explosions over millions of years, each created by the convergence of two which are ultra-compact remnants of no larger than two suns.

"Our research provides new insight into a part of the Milky Way where we find some of the oldest stars in our galaxy," said Dr Crocker from the ANU Research School of Astronomy and Astrophysics.

Dr Crocker said the team had ruled out the at the centre of the Milky Way and the still-mysterious dark matter as being the sources of the antimatter.

He said the antimatter came from a system where two white dwarfs form a binary system and collide with each other. The smaller of the binary stars loses mass to the larger star and ends its life as a helium white dwarf, while the larger star ends as a carbon-oxygen white dwarf.

"The binary system is granted one final moment of extreme drama: as the white dwarfs orbit each other, the system loses energy to gravitational waves causing them to spiral closer and closer to each other," Dr Crocker said.

He said once they became too close the carbon-oxygen white dwarf ripped apart the companion star whose helium quickly formed a dense shell covering the bigger star, quickly leading to a thermonuclear supernova that was the source of the .

The research is published in Nature Astronomy.


Explore further

Are there antimatter galaxies?

More information: "Diffuse Galactic Antimatter from Faint Thermonuclear Supernovae in Old Stellar Populations," Roland M. Crocker et al., 2017 May 22, Nature Astronomy, nature.com/articles/doi:10.1038/s41550-017-0135
Journal information: Nature Astronomy

Citation: Scientists solve mystery of how most antimatter in the Milky Way forms (2017, May 22) retrieved 25 May 2019 from https://phys.org/news/2017-05-scientists-mystery-antimatter-milky.html
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May 22, 2017
Antimatter is normal matter with a reversal in orbiters.

May 22, 2017
Antimatter is normal matter with a reversal in orbiters.

You do certainly have a way of making stuff up...and making it sound as stupid as possible. I'll have to grant you that.

May 22, 2017
Antimatter is normal matter with a reversal in orbiters.

You do certainly have a way of making stuff up...and making it sound as stupid as possible. I'll have to grant you that.

1. Conservation of charge. 2. A charge exist from it center to infinity, Coulomb. 3. Therefore only a set of diametrical spherical fields that obey all of Maxwell.

Got something else you have no idea of its existence; however, we know charge. Seems most don't ever define its axiomatic structure logically, but nonsensically, saying it has mass. Yeah, I'm making stuff up, assign an experimental constant illogically to an object's bi-polar constituents. Right!

Anti- is a label of a Proton moving like an electron within a cloud chamber. There is no reason to even infer an undefinable anti-. Also, QM is not science!

May 22, 2017
" A charge exist from it center to infinity, Coulomb."

So enough internet for me today?

"Also, QM is not science!"

Yep i'm done.

You know science very well man. Will you teach me?

May 22, 2017
Got something else you have no idea of its existence; however, we know charge. Seems most don't ever define its axiomatic structure logically, but nonsensically, saying it has mass. Yeah, I'm making stuff up, assign an experimental constant illogically to an object's bi-polar constituents. Right!

Erm...whut? Care to rephrase that into english? And then preferrable reread and re-edit it until it makes some kind of sense (correct syntax, and then some kind of semantics). You're really just posting garbled messes, you are aware of that? Please tell me you're not so stupid as to be unaware of that.

(Oh, BTW: I'm pretty sure 'diametrical field' does not mean what you think it means)

May 23, 2017
"Science": You keep using that word. I do not think it means what you think it means.

May 23, 2017
This comment has been removed by a moderator.

May 23, 2017
Antimatter does not exist in the universe. There is only the annihilation of an electron-positron (pair) of which is formed gluon (energy "liquid" state of matter. Proton and antiporoton not matter and antimatter, because a proton is composed of 3kg particles and positron, antiproton, instead of a positron has the electron. When the collisions occur 6 quarks and gluons 7. From that create new particles and releases large amounts of energy. that's what science is seen as dark matter or energy, it is a condition ether of which science knows virtually nothing.

This is from HF's European cousin....

May 23, 2017
[q
This is from HF's European cousin....

Please, pardon any linguistic error, I simply state that all that exist is charge. I infer this logically that mass is a constant of proportionality among aggregates of charge pairs. I also see charge as not particulate, since that would require a source; therefore, the field is it! I say diametrical as in mirror image. I know, need a proof! I start with we exist and charge exist, definitely!


May 23, 2017
[q
This is from HF's European cousin....


Please, pardon any linguistic error, I simply state that all that exist is charge. I infer this logically that mass is a constant of proportionality among aggregates of charge pairs. I also see charge as not particulate, since that would require a source; therefore, the field is it! I say diametrical as in mirror image. I know, need a proof! I start with we exist and charge exist, definitely!


I know this does not exist for those who believe in magic.

May 23, 2017
Please, pardon any linguistic error, I simply state that all that exist is charge. I infer this logically that mass is a constant of proportionality among aggregates of charge pairs. I also see charge as not particulate, since that would require a source; therefore, the field is it! I say diametrical as in mirror image. I know, need a proof! I start with we exist and charge exist, definitely!
I know this does not exist for those who believe in magic.

I get your "diametric spheres". I'm just not seeing proper applicability in that those "fields" have varying densities from the center out. This implies that any other "diametric spheres" have to be varied in some manner, as well. Not to mention they need to be changing those variables to stay balanced...
Ergo - NOT mirror image...
No "magic" is apparent if you truly understand the engineering/mechanic of an observed thing.
And.... How do you define charge?
Lastly, I was quoting Nikola_M, not you...

May 24, 2017
... And.... How do you define charge?
Lastly, I was quoting Nikola_M, not you...

I'm an EE I know charge, the mystery is how this ever formed, a sea of "opposite" charges, note diametrical also means opposite. Our isomorphism with mathematics and theory is not the actuality. It's manner to define what we see.

Note that these opposite field centers may overlap, oscillate about each other, fly away. Anyway, I just saying know what you are talking about. There is no such thing as gravity waves. Einstein is simply wrong! the velocity of light is the original_wavelenght/measured_period; but, note this is only a wrinkle of the field. Please, I'm only here to enlighten, not teach you fundamentals. I assume all know fundamentals, I'm simply applying clarity.

May 27, 2017
This comment has been removed by a moderator.

May 27, 2017
grasp the truth.

Like I said , know what you are talking about. God was before money, Ancient Egypt, provider of all. How else could one build the pyramids? Just because we can think, does not make our thinking logical. Rely upon simple Truth. Modern Physics as well as modern society is bogus. You were sold a bill of goods worth absolutely nothing. Money has no value. As far as Einstein and QM, I'm amazed at man's stupidity and stubbornness. We can't even heal the sick without trying to capitalize, or destroy the air and ocean for $'s of no value.

Now we create lies to tell the uninformed and keep it all away from the people. We give a Nobel, surplus of destruction, dynamite with a group that will believe anything.

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