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Description
</pre><p>GALAH is a large-scale stellar spectroscopic survey project exploring the history of star formation, chemical evolution, stellar migration and minor mergers in the Milky Way. One of the main science goals of GALAH is to use chemical tagging to identify groups of stars that formed at the same place and time, even though they have dispersed throughout the Galaxy, using the similarity of their chemical abundance patterns. Using the HERMES spectrograph at the Anglo-Australian Telescope, we collect high-resolution (R~28,000) spectra for 360 stars simultaneously. These stars are selected simply in magnitude (14>V>12), Galactic latitude (|b|>10) and declination (dec<+10) to maximise our ability to learn about the underlying structure of the Galaxy.
<p>There are 342,682 unique stars in DR2, observed between January 2014 and January 2018. For these stars, we have derived radial velocities, stellar parameters, and the abundances of up to 23 elements per star.
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