Bizarre Alien Matter Discovered at Core of Supernova Neutron Star
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February 24, 2011

Bizarre Alien Matter Discovered at Core of Supernova Neutron Star

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Evidence for a bizarre state of matter has been found in the dense core of the star left behind, a so-called neutron star, based on cooling observed over a decade of Chandra observations. NASA's Chandra X-ray Observatory discovered the first direct evidence for a superfluid, a bizarre, friction-free state of matter, at the core of Cassiopeia A. Superfluids created in laboratories on Earth exhibit remarkable properties, such as the ability to climb upward and escape airtight containers. The finding has important implications for understanding nuclear interactions in matter at the highest known densities.

Neutron stars contain the densest known matter that is directly observable. One teaspoon of neutron star material weighs six billion tons. The pressure in the star's core is so high that most of the charged particles, electrons and protons, merge resulting in a star composed mostly of uncharged particles called neutrons.

Two independent research teams studied the supernova remnant Cassiopeia A, or Cas A for short, the remains of a massive star 11,000 light years away that would have appeared to explode about 330 years ago as observed from Earth. Chandra data found a rapid decline in the temperature of the ultra-dense neutron star that remained after the supernova, showing that it had cooled by about four percent over a 10-year period.

"This drop in temperature, although it sounds small, was really dramatic and surprising to see," said Dany Page of the National Autonomous University in Mexico. "This means that something unusual is happening within this neutron star."

Superfluids containing charged particles are also superconductors, meaning they act as perfect electrical conductors and never lose energy. The new results strongly suggest that the remaining protons in the star's core are in a superfluid state and, because they carry a charge, also form a superconductor.

"The rapid cooling in Cas A's neutron star, seen with Chandra, is the first direct evidence that the cores of these neutron stars are, in fact, made of superfluid and superconducting material," said Peter Shternin of the Ioffe Institute in St Petersburg, Russia, leader of a team with a paper accepted in the journal Monthly Notices of the Royal Astronomical Society.

Both teams show that this rapid cooling is explained by the formation of a neutron superfluid in the core of the neutron star within about the last 100 years as seen from Earth. The rapid cooling is expected to continue for a few decades and then it should slow down.

"It turns out that Cas A may be a gift from the Universe because we would have to catch a very young neutron star at just the right point in time," said Page's co-author Madappa Prakash, from Ohio University. "Sometimes a little good fortune can go a long way in science."
 
The onset of superfluidity in materials on Earth occurs at extremely low temperatures near absolute zero, but in neutron stars, it can occur at temperatures near a billion degrees Celsius. Until now there was a very large uncertainty in estimates of this critical temperature. This new research constrains the critical temperature to between one half a billion to just under a billion degrees.

Cas A will allow researchers to test models of how the strong nuclear force, which binds subatomic particles, behaves in ultradense matter. These results are also important for understanding a range of behavior in neutron stars, including "glitches," neutron star precession and pulsation, magnetar outbursts and the evolution of neutron star magnetic fields.

Small sudden changes in the spin rate of rotating neutron stars, called glitches, have previously given evidence for superfluid neutrons in the crust of a neutron star, where densities are much lower than seen in the core of the star. This latest news from Cas A unveils new information about the ultra-dense inner region of the neutron star.

"Previously we had no idea how extended superconductivity of protons was in a neutron star," said Shternin's co-author Dmitry Yakovlev, also from the Ioffe Institute.

The cooling in the Cas A neutron star was first discovered by co-author Craig Heinke, from the University of Alberta, Canada, and Wynn Ho from the University of Southampton, UK, in 2010. It was the first time that astronomers have measured the rate of cooling of a young neutron star.



The Daily Galaxy via Chandra X-ray Center

Image Credit: This image presents a beautiful composite of X-rays from Chandra (red, green, and blue) and optical data from Hubble (gold) of Cassiopeia A, the remains of a massive star that exploded in a supernova.

The artist's illustration in the inset shows a cutout of the interior of the neutron star where densities increase from the crust (orange) to the core (red) and finally to the region where the "superfluid" exists (inner red ball.) Credit: X-ray: NASA/CXC/UNAM/Ioffe/D.Page,P. Shternin et al; Optical: NASA/STScI; Illustration: NASA/CXC/M. Weiss


Comments

There has to be something, someone who started the universe. If it was the "Big Bang" who/what created the big bang? I choose to call this "creator" or "starter" God or a Higher Power that is beyond the human intelligence and/or comprension. Your thoughts?

I don't particularly want to start a religious discussion here, so I'll just say you can call the trigger of the beginning of the universe whatever you want. You're obviously looking for someone to argue with, so yeah.

On the article; This is quite interesting. I have never heard of superfluids being discovered in nature before. I'd really like to find out the process that the core has gone through since the star's death.

@Richard Miller

There has to be something, someone who started the Creator. If it was the "Starter" who/what created the Starter?

Your move.

checkmate

If there is a creator, it must be created too, so it must be a part of an alien race that are billions of years ahead of our evolution (if there's such thing) that created our part of the universe. Since the space is infinite, so are the possibilities.

Don't freed the trolls.

Ummm...on the other hand, there is evidence to suggest we each "create" our own universe, our self-aware observations causing the collapse of some local wave function to a now-known state (but only for the observer). For someone who has not made the observation the Universe is a very different place unless we propagate the collapse through information transfer. Truly then, we are the music while the music lasts.

I think tonight I'll collapse the universe and expand it back out, just to see what happens.

Logan you introduce a very interesting idea. Why does the Creator have to create anything physical? Why not simply create a virtual everything? If we only exist in a virtual world, all of us would feel real, test real and in truth be connected to the same source. The possibilities become endless.

We are perhaps only an illusion created by the Creator a part of the Creator, a free willed illusion perhaps but again only an illusion.

You assume the Universe is a chain of events. If the creator created the universe, then who created the creator? But hang on a minute, an event only occurs if there is time. And we already have elementary evidence to suggest that time isn't as continuous and absolute as we perceive it. If there was no time or it was somehow different, then an idea or an object could only exist, with no beginning and with no end. Consider this - linear time only exists here and now.


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