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Dark energy can change over time

Astronomers have found evidence that an invisible power called dark energy, which could be constant, if over time. If confirmed, this result would analyze astronomers' understanding of the history and structure of the universe.

New research uses X-ray observatory and ESA XMM-Newton data ultrasound rays with data from the Sloan Digital Sky Survey (SDSS).

First, 20 years ago, the explosive star called Supernobas, at the earliest to measure distances, dark energy is its own energy or energy type, which filters all space and accelerates the acceleration of the Universe. The composition of the universe is about 70%.

The "concordance model" most often used in the history and structure of the universe is interpreted as cosmological constant in "dark energy". This means that it is energy related to pure space and is kept constant in space and time.

The final axis of the result is to develop a new method for determining the quasars distances, with the shining bright black holes in the universe. This method, which uses data about 1,600 quasar, allows astronomers to determine remote distances that are far away from Earth far beyond the observed supernovae.

Using Quasar distances, the lengthy calculations of the expansion rate of the Elisabeta Lusso University of Durham University in Florence, the University of Florence, and the United Kingdom, for the first time in the evolution of the Universe. XMM-Newton revealed that Quasar was 2.3 million years old at the universe, and Chandra and XMM detected 1,1 million and 2.3 million years of age. (The universe currently admitted is 13.8 million years old …

As described in the latest Nature Astronomy, they have found an expansion rate from predictive pattern predictions.

"We saw millions of years before the Second World Crash, and the universe's expansion rate was faster than we expected today," says Risaliti. "This means that dark energy strengthens the fact that the cosmos is older."

New techniques use UV and X-ray data to calculate their distances.

Quasar creates a light-emitting black hole disk drive. Some UV lamps collect electrons with a gas cloud that is below the elastic and disc, and these ratios allow UV light energy to increase to X-ray energy. Interaction causes correlation between the amounts of UV and X-ray radiation. Quasar distance depends on this correlation.

Risaliti and Lusso compiled the UV data of XSS and XMM SDSS and X-ray data for 1,598 quasars to obtain a relationship between UV and X-ray streams and obtain the quasars distances. This information was used to analyze the expansion rate of the universe for the first time. They have found evidence showing how long the energy is growing.

"As a new technique, we gave more steps to this method, which offers reliable results," says Lusso. "Our technique results show that in the last 9 million years they are consistent with supernovae measurements, confidence that our results are trustworthy before that."

The researchers also looked carefully at how they selected their quasars to minimize statistical errors and avoid systemic defects that could affect the distance between the Earth and the object.

If verified, this result would be dark energy that would not be constantly cosmological. It also helps to keep constant measurement of Constant Hubble (the expansion velocity of the Universe), based on local indicators and based on a Micro-Micron Background Background (CMB).

Using supernova observations, astronomers earlier reported that the universe was rapidly expanding so far, after the big bang, since the CMB was expected to be expected for its journey.

"Some scientists have suggested that new physics is needed to explain this disagreement, while dark energy is growing," says Risaliti. "Our new results agree with this suggestion".

In order to test these results, Risaliti and Lusso want to use a large sample of Chandra's observation at the highest distance and apply the same technique.

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