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The Galah Survey: Classification and diagnostics with t-SNE reduction of spectral information
G. Traven, G. Matijevič, T. Zwitter +24
Galah is an ongoing high-resolution spectroscopic survey with the goal of disentangling the formation history of the Milky Way, using the fossil remnants of disrupted star formatio…
A broad perspective on multiple abundance populations in the globular cluster NGC 1851
Jeffrey D. Simpson, Sarah L. Martell, Colin A. Navin
We present an analysis of the multiple stellar populations of the globular cluster NGC 1851. We used lower resolution spectra of giant stars to measure CN, CH, and calcium H & K sp…
The GALAH Survey: Observational Overview and Gaia DR1 companion
Sarah Martell, Sanjib Sharma, Sven Buder +30
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 an…
The GALAH survey: The data reduction pipeline
Janez Kos, Jane Lin, Tomaž Zwitter +29
We present the data reduction procedures being used by the GALAH survey, carried out with the HERMES fibre-fed, multi-object spectrograph on the 3.9~m Anglo-Australian Telescope. G…
An extreme paucity of second population AGB stars in the normal globular cluster M4
B. T. MacLean, S. W. Campbell, G. M. De Silva +4
Galactic Globular clusters (GCs) are now known to harbour multiple stellar populations, which are chemically distinct in many light element abundances. It is becoming increasingly…
The GALAH Survey: Relative throughputs of the 2dF fibre positioner and the HERMES spectrograph from stellar targets
Jeffrey D. Simpson, G. M. De Silva, J. Bland-Hawthorn +11
We present an analysis of the relative throughputs of the 3.9-metre Anglo-Australian Telescope's 2dF/HERMES system, based upon spectra acquired during the first two years of the GA…