Abstract
The Galactic Archaeology with HERMES (GALAH) survey is a massive
observational project to trace the Milky Way's history of star
formation, chemical enrichment, stellar migration and minor mergers.
Using high-resolution (R ≃ 28 000) spectra, taken with the High
Efficiency and Resolution Multi-Element Spectrograph (HERMES) instrument
at the Anglo-Australian Telescope, GALAH will determine stellar
parameters and abundances of up to 29 elements for up to one million
stars. Selecting targets from a colour-unbiased catalogue built from
2MASS, APASS and UCAC4 data, we expect to observe dwarfs at 0.3-3 kpc
and giants at 1-10 kpc. This enables a thorough local chemical inventory
of the Galactic thin and thick discs, and also captures smaller samples
of the bulge and halo. In this paper, we present the plan, process and
progress as of early 2016 for GALAH survey observations. In our first
two years of survey observing we have accumulated the largest
high-quality spectroscopic data set at this resolution, over 200 000
stars. We also present the first public GALAH data catalogue: stellar
parameters (Teff, log(g), [Fe/H], [α/Fe]), radial
velocity, distance modulus and reddening for 10 680 observations of 9860
Tycho-2 stars, 7894 of which are included in the first Gaia data
release.
Original language | English |
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Pages (from-to) | 3203-3219 |
Number of pages | 17 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 465 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1 Mar 2017 |