Astronomers have discovered the most ancient supernova


02/11/2012

Australian astronomers have found the oldest evidence of an explosion of a supernova that occurred 12.1 billion years ago in the early universe. For details, scientists have been published in the journal Nature, a summary of the reports ScienceNow.

This discovery could make astronomers because of prolonged observations with a telescope Canada-France-Hawaii, which is located in Hawaii, on the top of Mauna Kea. The image was obtained by applying a specific area of thousands of pictures of the sky - the constellation of Sextant. It was here that scientists have paid attention to the unusually bright star of the old record, which was related to unstable supernovae - a very rare class of stars. These massive stars collapse over time due to the formation of electron-positron pairs.

After completing the analysis of the spectrum of the galaxy, the point of entry of a supernova, the scientists found that the red shift of its fully corresponds to the age of 12.1 billion years. It turns out that the supernova occurred after the Big Bang, after just 1.6 billion years old. Age finds more nearly a billion years, compared to the corresponding index of the most ancient of supernovae, which are already known.

However, the newly discovered supernova does not belong to the first generation of stars formed from primordial gas. In a gas, it contained only hydrogen, helium and lithium, which appeared as a result of the Big Bang. While the heavier elements, for example carbon and oxygen has already begun to form themselves directly into the stars. All the elements were gradually transformed themselves into the material to form the next generation of stars, to which the newly discovered supernova belongs.


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