Earth`s most powerful telescope strengthens Big Bang theory
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Last Updated: Friday, June 07, 2013, 10:37
Washington: Scientists using the most powerful telescope on Earth has discovered that the moments just after the Big Bang happened more like the theory predicts, eliminating a significant discrepancy that troubled physicists for two decades.

One of the most important problems in physics and astronomy was the inconsistency between the lithium isotopes previously observed in the oldest stars in our galaxy, which suggested levels about two hundred times more Li-6 and about three to five time less Li-7 than Big Bang nucleosynthesis predicts.


The team, led by Karin Lind of the University of Cambridge, has proven that the decades-old inventory relied on lower-quality observational data with analysis using several simplifications that resulted in spurious detections of lithium isotopes.

Using observations of ancient stars with W. M. Keck Observatory's 10-meter telescope and state-of-the-art models of their atmospheres has shown that there is no conflict between their lithium-6 and lithium-7 content and predictions of the standard theory of Big Bang nucleosynthesis, restoring thus the order in our theory of the early universe.

The discovery that the universe was expanding by Edwin Hubble in the 1920s and subsequent observations suggest the universe began about 13.8 billion years ago in an event called the Big Bang. The fundamental observations that corroborate the Big Bang are the cosmic microwave radiation and the chemical abundances of the light elements described in the Big Bang nucleosynthesis theory.

"The predictions of Big Bang nucleosynthesis have been one of the main successes of the standard Big Bang model," said lead author Lind.



The required data can only be obtained with the largest telescopes on Earth such as the Keck Observatory on the summit of Mauna Kea, Hawaii equipped with the powerful High Resolution Echelle Spectrometer (HIRES) spectrograph to disperse the stellar light into its constituent colours and absorption features.

The discovery will be published in the international journal Astronomy Astrophysics.


First Published: Friday, June 07, 2013, 10:37

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