Astronomy / Space Half the Universe's Missing Matter Has Finally Been Found

SciTrekker

SciTrekker
Source: https://science.slashdot.org/story/...es-missing-matter-has-just-been-finally-found


The missing links between galaxies have finally been found. This is the first detection of the roughly half of the normal matter in our universe -- protons, neutrons and electrons -- unaccounted for by previous observations of stars, galaxies and other bright objects in space. You have probably heard about the hunt for dark matter, a mysterious substance thought to permeate the universe, the effects of which we can see through its gravitational pull. But our models of the universe also say there should be about twice as much ordinary matter out there, compared with what we have observed so far. Two separate teams found the missing matter -- made of particles called baryons rather than dark matter -- linking galaxies together through filaments of hot, diffuse gas. "The missing baryon problem is solved," says Hideki Tanimura at the Institute of Space Astrophysics in Orsay, France, leader of one of the groups. The other team was led by Anna de Graaff at the University of Edinburgh, UK. Because the gas is so tenuous and not quite hot enough for X-ray telescopes to pick up, nobody had been able to see it before.​
 

Para Handy

Para Handy
SciTrekker said:
Source: https://science.slashdot.org/story/...es-missing-matter-has-just-been-finally-found
The missing links between galaxies have finally been found. This is the first detection of the roughly half of the normal matter in our universe -- protons, neutrons and electrons -- unaccounted for by previous observations of stars, galaxies and other bright objects in space. You have probably heard about the hunt for dark matter, a mysterious substance thought to permeate the universe, the effects of which we can see through its gravitational pull. But our models of the universe also say there should be about twice as much ordinary matter out there, compared with what we have observed so far. Two separate teams found the missing matter -- made of particles called baryons rather than dark matter -- linking galaxies together through filaments of hot, diffuse gas. "The missing baryon problem is solved," says Hideki Tanimura at the Institute of Space Astrophysics in Orsay, France, leader of one of the groups. The other team was led by Anna de Graaff at the University of Edinburgh, UK. Because the gas is so tenuous and not quite hot enough for X-ray telescopes to pick up, nobody had been able to see it before.
​
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Here is an article from the Guardian about this from a couple of weeks ago.

https://www.theguardian.com/science...nd-half-of-the-missing-matter-in-the-universe

... with links to the arXiv papers.

[where is it]
 

Para Handy

Para Handy
taotoo said:
But the headline says "Half the Universe's Missing Matter Has Finally Been Found".

Dark matter (or baryons) would account for the bulk of that wouldn't it?
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The headline in the (very poorly written to my mind) New Scientist Article just says the same as this thread. No mention of dark matter in the headline. The point of the papers was that they were able to determine the presence of the "WHIM" (warm-hot interstellar medium) and that this suggested they could now account for a large proportion of that baryonic matter that was otherwise undetectable. This has nothing to do with dark matter, it just refers to normal baryons and the fact that the expected amount in the universe was much more than could be accounted for by observation.

The Guardian article I linked in my last post has a better explanation of it than my mangled sentence above. :)
 
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GODofDUTY83

GODofDUTY83
Para Handy said:
The headline in the (very poorly written to my mind) New Scientist Article just says the same as this thread. No mention of dark matter in the headline. The point of the papers was that they were able to determine the presence of the "WHIM" (warm-hot interstellar medium) and that this suggested they could now account for a large proportion of that baryonic matter that was otherwise undetectable. This has nothing to do with dark matter, it just refers to normal baryons and the fact that the expected amount in the universe was much more than could be accounted for by observation.

The Guardian article I linked in my last post has a better explanation of it than my mangled sentence above. :)
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Yeah.
Its not dark matter. Its a good chunk of ordinary matter that has been undetectable up until now. Hope these guys and gals have this confirmed as I would like to see the map for myself.
 

Non Grata

Non Grata
Para Handy said:
No mention of dark matter in the headline.
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It's just that as I understand it the majority of the universe's missing matter is thought to be dark matter, therefore it would be assumed that the headline is referring to it. Just a poorly-written headline I presume.
 

SciTrekker

SciTrekker
GODofDUTY83 said:
Yeah.
Its not dark matter. Its a good chunk of ordinary matter that has been undetectable up until now. Hope these guys and gals have this confirmed as I would like to see the map for myself.
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If you have access to a copy, the latest issue of Discover magazine has a picture (online version is paywalled or I'd have linked it) - Nov/Dec issue I think (already read physical copy and recycled it so can't confirm so going off weak memory :eek:).
 

Archduke

A
Baryonic Dark Matter is just a description for a solution to "Dark Matter" comprised of baryons ('particles' as combinations of ensemble colour states resolvied as 3 or possibly more quarks)It's still "Dark Matter", since the description of "Dark Matter is simply what is responsible for gravitational anomaly that lacks a reliable, measured physical model.The essence of Dark Matter is pretty generally divided into the Baryonic Dark Matter and the Non-baryonic. These are both considered under te umbrella 'Dark Matter', because even the Baryonic is not directly observed in familiar form. What has occurered is that much of the Baryonic (which is still only a portion of the total mass contradiction to gravitational effect anomaly for which Dark Matter represents) matter has now finally been identified and as very thin, but dense strands of filament it evaded more typical measurement and observation through being so remote and of small arc distances as viewed.This diagram helps to visualise the distinct Dark matter problem and its divisions:https://ned.ipac.caltech.edu/level5/Ramachers/Figures/figure1.jpeg
 
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yolomcbobbinz

Y
Whitehair said:
The rest will be found in all the missing socks.....
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Those darn sock gnomes, I might buy those "throcks", socks than come in 3's instead of a pair so I'll still have a pair after the wash.


On topic, isn't there a thread here that has evidence that Dark matter didn't exist? I want to believe there's there, I don't think the emptiness in space is just void of anything.
 

Zak Gordon

Zak Gordon
If you think about it, how this universe (because you know, they may be more than this one) was created, what we know about the Big Bang etc; it does make a whole lot of sense that the expanding gaps between the galaxies is full of bits of matter, stuff we have not been able to see or detect before in any detail. It's not 'empty' space out there in the black.

So now we can detect it, and the theory suggests we might have solved some of the problem over missing matter in the universe. Pretty cool, but not unexpected really when you think on the creation process of the universe :)
 

ZeroAi

ZeroAi
SciTrekker said:
Source: https://science.slashdot.org/story/...es-missing-matter-has-just-been-finally-found

The missing links between galaxies have finally been found. This is the first detection of the roughly half of the normal matter in our universe -- protons, neutrons and electrons -- unaccounted for by previous observations of stars, galaxies and other bright objects in space. You have probably heard about the hunt for dark matter, a mysterious substance thought to permeate the universe, the effects of which we can see through its gravitational pull. But our models of the universe also say there should be about twice as much ordinary matter out there, compared with what we have observed so far. Two separate teams found the missing matter -- made of particles called baryons rather than dark matter -- linking galaxies together through filaments of hot, diffuse gas. "The missing baryon problem is solved," says Hideki Tanimura at the Institute of Space Astrophysics in Orsay, France, leader of one of the groups. The other team was led by Anna de Graaff at the University of Edinburgh, UK. Because the gas is so tenuous and not quite hot enough for X-ray telescopes to pick up, nobody had been able to see it before.​
Click to expand...

"Now two separate teams of scientists, one at the University of Edinburgh, the other at the Institute of Space Astrophysics in Orsay, France, have produced compelling indirect evidence for the Whim."

A good theory!

Interesting stuff!

Not fact yet...
 
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