Dark Energy May Not Exist At All

Posted: Apr 1 2017, 12:23pm CDT | by , Updated: Apr 1 2017, 2:10pm CDT, in News | Latest Science News

Dark Energy May Not Exist At All
The map of dark matter in the universe obtained from KiDS survey. Credit: Kilo-Degree Survey Collaboration/H. Hildebrandt & B. Giblin/ESO
  • This is a frame from an animation that shows the expansion of the universe in the standard 'Lambda Cold Dark Matter' cosmology

The most novel evidence shows that dark energy may have been a null concept all along. It just doesn’t exist at all.

Since the 90s, physicists have said with some degree of certainty that the universe is not only expanding, but getting bigger and bigger at an ever increasing pace. An enigmatic phenomenon termed dark energy has been postulated to be responsible for this fast rate of expansion.

Yet a new study proves that this so-called dark energy was just a mirage. Behind it lay the changing structure of the universe which gave the false impression of such a force which was in reality non-existent.

Physicists question the fact that approximations in Einstein’s equations showed some very somber side effects. These gave the image of a universe that was expanding in fast forward mode.

Were dark energy to actually be a reality, it would constitute 68% of the energy in the universe. Yet it would be pretty difficult to identify in a lab. Also the shape of the universe and the ripples of matter that swim in it would be explained by dark energy.

The only issue is that currently, this thing called dark energy is an empty concept. It has nothing to bolster or support it (even on a theoretical level).

The empty space that is termed a cosmological constant and labeled as the Greek letter “lambda” is all it signifies. In the early 20th century, Einstein proposed the cosmological constant as something which allowed the universe to expand without all of matter being pulled back by gravity.

It was a convenient ruse. Hubble suggested that the universe was not just putting off its collapse but expanding at a brisk pace. That was when the cosmological constant was thrown in the dustbin of history.

Now though that previous hypothesis has been revised. The cosmological constant has been reintroduced into common physics parlance but only cautiously and tentatively.

Taken together with the black box factor which stands for dark matter, we achieve the Lambda Cold Dark Matter Model. This explains the evolutionary story of the universe as we know it.

This is a frame from an animation that shows the expansion of the universe in the standard 'Lambda Cold Dark Matter' cosmology, which includes dark energy (top left panel red), the new Avera model, that considers the structure of the universe and eliminates the need for dark energy (top middle panel, blue), and the Einstein-de Sitter cosmology, the original model without dark energy (top right, green). The panel at the bottom shows the increase of the 'scale factor' (an indication of the size) as a function of time, where 1Gya is 1 billion years. The growth of structure can also be seen in the top panels. One dot roughly represents an entire galaxy cluster. Units of scale are in Megaparsecs (Mpc), where 1 Mpc is around 3 million million million km. Credit: István Csabai et al.

Einstein’s relativity theory covered a lot of things yet it was a product of its times. Today we have come a long way since those good old days.

The model of the universe we have today shows that this thing called dark energy is more of a deficit rather than a positive concept with any substance to it. Its riddle may be solved by thinking outside the box but on the whole its existence is a moot point.

The results of this study were published in a paper in Monthly Notices of the Royal Astronomical Society.

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<a href="/latest_stories/all/all/20" rel="author">Sumayah Aamir</a>
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