GAHAL loggo

On Friday 6 November, the largest set of stellar chemical data ever compiled is being released to the public from the Galactic Archaeology with HERMES (GALAH) project, which aims to investigate the evolution of stars and chemical elements in the Milky Way. It does this using an instrument called the High Efficiency and Resolution Multi-Element Spectrograph, or HERMES, which is connected to the Anglo Australian Telescope (AAT) at the Australian Astronomical Observatory at Siding Spring in rural New South Wales.

The data comprise more than 500 GB of information gleaned from more than 30 million individual measurements for a total of 600,000 stars. Karin Lind at Stockholm University has had a key role in the analysis work as part of the larger GALAH consortium and the publication accompanying the data release (submitted to Monthly Notices of the Royal Astronomical Society) is spearheaded by Sven Buder, Lind's former PhD student and now a postdoctoral fellow at the Australian National University in Canberra.

The GALAH survey continues observations and thereby takes international lead in the dawn of million-star high-resolution spectroscopy.

GALAH press release (136 Kb)