The GALAH survey: scientific motivation

G. M. De Silva; K. C. Freeman; J. Bland-Hawthorn; S. Martell; E. Wylie de Boer; M. Asplund; S. Keller; S. Sharma; D. B. Zucker; T. Zwitter; B. Anguiano; C. Bacigalupo; D. Bayliss; M. A. Beavis; M. Bergemann; S. Campbell; R. Cannon; D. Carollo; L. Casagrande; A. R. Casey; G. Da Costa; V. D'Orazi; A. Dotter; L. Duong; A. Heger; M. J. Ireland; P. R. Kafle; J. Kos; J. Lattanzio; G. F. Lewis; J. Lin; K. Lind; U. Munari; D. M. Nataf; S. O'Toole; Q. Parker; W. Reid; K. J. Schlesinger; A. Sheinis; J. D. Simpson; D. Stello; Y. -S. Ting; G. Traven; F. Watson; R. Wittenmyer; D. Yong; M. Zerjal

doi:10.1093/mnras/stv327

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The GALAH survey: scientific motivation

G. M. De Silva, K. C. Freeman, J. Bland-Hawthorn, S. Martell, E. Wylie de Boer, M. Asplund, S. Keller, S. Sharma, D. B. Zucker, T. Zwitter, …

Monthly notices of the Royal Astronomical Society, Vol.449(3), pp.2604-2617

05/21/2015

DOI: 10.1093/mnras/stv327

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Abstract

The Galactic Archaeology with HERMES (GALAH) survey is a large high-resolution spectroscopic survey using the newly commissioned High Efficiency and Resolution Multi-Element Spectrograph (HERMES) on the Anglo-Australian Telescope. The HERMES spectrograph provides high-resolution (R similar to 28 000) spectra in four passbands for 392 stars simultaneously over a 2 deg field of view. The goal of the survey is to unravel the formation and evolutionary history of the Milky Way, using fossil remnants of ancient star formation events which have been disrupted and are now dispersed throughout the Galaxy. Chemical tagging seeks to identify such dispersed remnants solely from their common and unique chemical signatures; these groups are unidentifiable from their spatial, photometric or kinematic properties. To carry out chemical tagging, the GALAH survey will acquire spectra for a million stars down to V similar to 14. The HERMES spectra of FGK stars contain absorption lines from 29 elements including light proton-capture elements, alpha-elements, odd-Z elements, iron-peak elements and n-capture elements from the light and heavy s-process and the r-process. This paper describes the motivation and planned execution of the GALAH survey, and presents some results on the first-light performance of HERMES.

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Title: Subtitle: The GALAH survey: scientific motivation
Creators: G. M. De Silva - University of Sydney
K. C. Freeman - Australian National University
J. Bland-Hawthorn - University of Sydney
S. Martell - UNSW Sydney
E. Wylie de Boer - Australian National University
M. Asplund - Australian National University
S. Keller - Australian National University
S. Sharma - University of Sydney
D. B. Zucker - Macquarie University
T. Zwitter - University of Ljubljana
B. Anguiano - Macquarie University
C. Bacigalupo - Macquarie University
D. Bayliss - Australian National University
M. A. Beavis - University of Southern Queensland
M. Bergemann - Max Planck Institute for Astronomy
S. Campbell - Monash University
R. Cannon - Australian Astronomical Observatory
D. Carollo - Macquarie University
L. Casagrande - Australian National University
A. R. Casey - University of Cambridge
G. Da Costa - Australian National University
V. D'Orazi - Macquarie University
A. Dotter - Australian National University
L. Duong - Australian National University
A. Heger - Joint Institute for Nuclear Astrophysics
M. J. Ireland - Australian National University
P. R. Kafle - University of Western Australia
J. Kos - University of Ljubljana
J. Lattanzio - Monash University
G. F. Lewis - University of Sydney
J. Lin - Australian National University
K. Lind - Uppsala University
U. Munari - Osservatorio Astronomico di Padova
D. M. Nataf - Australian National University
S. O'Toole - Australian Astron Observ, N Ryde, NSW 1670, Australia
Q. Parker - Macquarie University
W. Reid - Macquarie University
K. J. Schlesinger - Australian National University
A. Sheinis - Australian Astronomical Observatory
J. D. Simpson - Macquarie University
D. Stello - University of Sydney
Y. -S. Ting - Center for Astrophysics Harvard & Smithsonian
G. Traven - University of Ljubljana
F. Watson - Australian Astronomical Observatory
R. Wittenmyer - UNSW Sydney
D. Yong - Australian National University
M. Zerjal - University of Ljubljana
Resource Type: Journal article
Publication Details: Monthly notices of the Royal Astronomical Society, Vol.449(3), pp.2604-2617
Publisher: Oxford Univ Press
DOI: 10.1093/mnras/stv327
ISSN: 0035-8711
eISSN: 1365-2966
Number of pages: 14
Grant note: FL110100012 / ARC; Australian Research Council DP1095368; DP120101815; DP120101237; DP120104562; FS110200035; FL110100012 / Australian Research Council (ARC); Australian Research Council National Science Foundation; National Science Foundation (NSF) 1430152 / Direct For Mathematical & Physical Scien; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) National Aeronautics and Space Administration; National Aeronautics & Space Administration (NASA) DE140100598 / ARC DECRA; Australian Research Council FT120100363 / ARC Future Fellowship; Australian Research Council
Language: English
Date published: 05/21/2015
Academic Unit: Physics and Astronomy
Record Identifier: 9984701823602771

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