Anaemic star carries the mark of its ancient ancestor

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Australian-led astronomers find the most iron-poor star in the Galaxy, hinting during the nature of this first stars into the Universe.

A newly discovered ancient star containing a record-low level of iron carries proof of a course of even older stars, long hypothesised but assumed to own vanished.

In a paper published into the journal Monthly Notices associated with Royal Astronomical Society: Letters, researchers led by Dr Thomas Nordlander for the ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) confirm the presence of an ultra-metal-poor giant that is red, found in the halo regarding the Milky Way, on the other side associated with the Galaxy about 35,000 light-years from Earth.

Dr Nordlander, through the Australian National University (ANU) node of ASTRO 3D, along with colleagues from Australia, the US and Europe, located the star utilising the university’s dedicated SkyMapper Telescope during the Siding Spring s Observatory in NSW.

Spectroscopic analysis indicated that an iron was had by the star content of just one part per 50 billion.

“That’s like one drop of water in an Olympic pool that is swimming” explains Dr Nordlander.

“This incredibly anaemic star, which likely formed just a few hundred million years after the Big Bang, has iron levels 1.5 million times less than compared to the Sun.”

Ab muscles stars that are first the Universe are thought to own consisted of only hydrogen and helium, along side traces of lithium. These elements were created within the immediate aftermath of the Big Bang, while all heavier elements have emerged through the heat and pressure of cataclysmic supernovae – titanic explosions of stars.

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