early Universe

early Universe

The era in the evolution of the Universe soon after the big bang when it was very hot and dense. As the Universe expanded it cooled, giving rise to a sequence of phase transitions associated with broken symmetries. The light elements such as helium were mostly formed in the early Universe. It has been suggested that in the early Universe inflation, i.e. very rapid expansion, occurred. The very early Universe, occurring immediately after the big bang, requires a fundamentally new physics involving the combination of quantum mechanics and general relativity theory before it will be understood.
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Models of the early universe predict such stars were massive, blue and short-lived.
Finding this miniscule signal has opened a new window on the early Universe," said Arizona State University astronomer Judd Bowman, the project's lead investigator.
The early universe was a pretty orderly place, not the gigantic mess that some people may imagine when they think about the aftermath of the Big Bang, according to new research.
Clumpiness in the density of the early universe piled up into traveling waves of abrupt density spikes, or shocks, like those that create a sonic boom, scientists say.
Quasars are among the brightest objects and they literally illuminate our knowledge of the early universe," BaEados said.
Xue-Bing Wu (Peking University, China) and colleagues found the quasar in an extensive survey of quasars in the early universe and report the detection in the February 26th Nature.
However, these clusters have not always existed, and a key question in modern cosmology is how such massive structures assembled in the early universe.
In a media release, the University of Arizona said that the black hole powered "the brightest quasar of the early universe.
Fan Xiaohui, professor from the University of Arizona's Steward Observatory and a member of Wu's team, said the discovery "presented a major puzzle" to the theories of black hole growth in the early universe.
Until now, however, these elusive cores had never been spotted because they're unique to the early Universe and probably heavily obscured from view.
Washington, May 14 ( ANI ): Researchers have measured the minute gravitational distortions in polarized radiation from the early universe and discovered that these ancient microwaves can provide a cosmological test of Einstein's theory of general relativity.
The Durham University astronomers were part of an international project which has used the newly-launched ALMA telescope in Chile, South America, to pinpoint the locations of more than 100 of the most fertile star-forming galaxies in the early universe.

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