Scientists have found a clue to the mystery behind the high abundance of Lithium— a trace element on Earth, and a key component of rechargeable batteries, in some evolved stars.
- They drew on a large survey of the compositions of red giants undertaken in Australia at the Australian National University with observations gathered by on the 3.9 m Anglo-Australian Telescope at the Australian Astrophysical Observatory.
- The survey GALAH – named after a common Australian bird — provided a collection of about 500,000 stars with well-determined physical and chemical properties, including lithium abundances.
- To find if the enrichment of lithium in red giants favours any particular mass and metallicity, they separated GALAH’s stars into different mass and metallicity ranges and then searched for lithium-rich giants among these groups.
- The Galactic Archaeology with HERMES (GALAH) Survey is an ambitious project using the AAT’s new HERMES spectrograph to observe a million stars in our Milky Way Galaxy.
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