The Case Of The Missing Matter


Some time back the gringa wrote about dark matter. This is invisible stuff in the universe that we only knows exists because of its gravitational affect upon other objects in space. Now scientists have a bit of a conundrum. It’s not bad enough that we have to accept the reality of lots of invisible stuff surrounding us but we also have to deal with the mystery that some of this stuff has just disappeared. Scientists want to know just where all this missing matter has got to. This is what they call the “global missing baryon problem”.

The easiest explanation of the “global missing baryon problem” goes something like this:

Baryon – this is a subatomic particle that has a mass equal to or greater than a proton. Despite the fact that the universe is incredibly vast, scientists, through mathematical formulas using their knowledge of how many protons are found in specific types of matter, can actually calculate how many atoms, protons, electrons, neutrons and baryons should be present in a galaxy. It seems that the expected number of baryons is coming up short. The baryon shortfall affects visible matter as well as dark matter.

The gringa would like to know just where the heck these baryons have gotten to and does it really matter in the grand scheme of things? I mean, am I going to wake up tomorrow and discover that half my ear is missing, or my flower pot has disappeared? Dear reader, you understand what I’m talking about. Is this something that we should really be worried about or is it just an enigmatic puzzle for scientists to puzzle over?

Australian astronomers from the Compact Array station claim that they know what has happened to the baryons. They believe that they are part of invisible structures in the Sagittarius constellation of our own Milky Way. And they are whopping big. The swath of space that Earth cuts as it makes a one year transit around the Sun is about the scope of the structures’ expected size. The telescopes used in Australia are radio telescopes so even though these dark matter structures are invisible, the Australian array is able to detect their presence in the Sagittarius constellation by “seeing” the gravitational affect on nearby stars and detecting changes in radio wavelengths within light.

Now, we’re not talking about invisible extra-terrestrial shopping malls. Astronomers are positing that it is more likely that the structures are large clouds of gas. They describe their shape as noodle-like. The gringa thinks maybe these are the spaghettified remains of objects sucked through a black hole. Scientists believe they are hollow. However, there is also the possibility that they are flat and one dimensional, like a bed sheet and they are viewing the edge. The gringa says, “Who the heck knows?! That about sums it up.”

Whatever they are and however they came about are distinct mysteries. All scientists really know is that they exist. The structures were discovered in 2014 when light from quasar PKS 1939-315 passed through the structures and became distorted. The light itself was not distorted but, rather, the radio wavelength band. Because the light intensity was not affected, it is believed that the invisible structures are dark matter that contain no dust. Kind of like light passing through a drinking glass. If the glass is clean, the light passes through just as bright on exit as on entry but still distorted. If the glass is dusty, the brightness of the light passing through dims in addition to the distortion produced by the glass’ matter itself.

These structures are not just sitting there twiddling their thumbs. Scientists have estimated that they are traveling about 30 miles per second (or 50 kilometers per second). Seeing as how they are about 3,000 light years away, the gringa’s not afraid of a surreptitious impact with invisible “stuff”.

But do the scientists know if this missing stuff serves a purpose? It seems that everything else in nature has a purpose, its own vital part in the grand scheme of things. These invisible structures could be very important. The gringa thinks it’s great to study them but we may not want to go messing about and interfering. Who knows what the heck could happen!

It seems that there are multiple theories on what their purpose is. Some scientists believe that the structures don’t behave like un-structured dark matter. Dark matter does not follow rotational and orbit patterns and could serve a purpose like cosmic fibers that hold galaxies together. However, scientists are not so sure that once dark matter forms structures like this their cosmic fiber job is still what they are doing. The gringa wonders if maybe they are just big galactic recycle bins, containing left over bits of matter that are left over from the creation process stars go through.

Basically, scientists only know that they are there. Bing, bang, boom, and that’s it. It’s like saying, “Hey, a giant, invisible elephant lives in your house and we don’t know how he got there or why he stays and if he is doing anything that affects your life. But we just thought you would like to know that he’s there.” Yeah, thanks guys.

Sources:

www.yahoo.com

arxiv.org

www.narrabri.atnf.csiro.au

www.iflscience.com

Image Source: www.ottawa-rasc.ca

 

 

 

 

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gringaofthebarrio

A barrio gringa with a dream of cosmic proportions: writing to satiate my insatiable curiosity, worldwide literacy beginning with our youth, and to be the first barrio gringa to explore outer space!

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