12 Aug 2019

Dark Matter may have existed before the Big Bang, new research suggests|

Dark Matter may have existed before the Big Bang

Dark matter

According to the Big Bang theory, 13.8 billion years ago everything was concentrated in a single point and the size of the point was less then an atom and that was know point of singularity. 

And because of such a dense mass and energy that point was totally unstable and such instability results in explosion that what we called Big Bang today. And this explosion created the Universe, and every thing that we see today.

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At that time nothing exists and it means, no space, no time and nothing, only singularity exist. That is what we called everything form nothing.

Resent study, published in the journal Physical Review Letters, presents a new idea of how dark matter was present even before the Big Bang.

“The study revealed a new connection between particle physics and astronomy,” said Tommi Tenkanen, a postdoctoral fellow at the Johns Hopkins University in the US.

“If dark matter consists of new particles that were born before the Big Bang, they affect the way galaxies are distributed in the sky in a unique way.

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“This connection may be used to reveal their identity and make conclusions about the times before the Big Bang too,” said Tenkanen.

Basically, Dark matter is what we don’t know about them much and we don't observe it yet, even after the research of more than of two decades.

But we know they exists because we know how much it affects the universe's expansion and we also know how much it is.
Dark energy is roughly 68% and dark matter is 27% while normal matter is just 5% in this universe.

As much we tries to solve it’s mystery, it becomes more mysterious. We have found a galaxy named "Dragonfly 44" that consists of 99.9% of dark matter only and the real matter only 0.01%.

New study suggests that, if dark matter came first, it also means that scientists will have to dramatically alter how they hunt for the substance in the universe.

Using a simple mathematical framework, researchers have shown that dark matter could have been produced well before the Big Bang, during a phase known as the “Cosmic Inflation”.

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This is the phase when space was expanding very rapidly. This lead to a certain type of particle, known as scalars, to be produced at a large scale, as per new study. The Higgs boson is the only known scalar that has been discovered yet.

And if dark matter is indeed older than the Big Bang, the substance would definitely have interacted with scalar particles, said Tenkanen.

For a long time, researchers believed that dark matter must be a leftover substance from the Big Bang.
Researchers have long sought this kind of dark matter, but so far all experimental searches have been unsuccessful.

"If dark matter were truly a remnant of the Big Bang, then in many cases researchers should have seen a direct signal of dark matter in different particle physics experiments already," Tenkanen said.

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The fact that researchers haven't seen such a signal yet is troubling. But Tenkanen said his model may point to a different approach for tackling the dark matter question, focusing on astronomical observations.

To the delight of dark matter enthusiasts, the study also proposes a way to test the origin of dark matter by observing signatures or imprints of dark matter in the distribution of celestial bodies in the universe.

In particular, Tenkanen said he sees potential in the European Space Agency's Euclid space telescope, which is scheduled to launch in 2022. That spacecraft is designed to map the edges of the universe, letting scientists look back about 10 billion years.

1 comment:

  1. Wow.. What, this is quite challenging..

    ReplyDelete