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The GALAH survey : Scientific motivation

De Silva, G. M. ; Freeman, K. C. ; Bland-Hawthorn, J. ; Martell, S. LU ; Wylie de Boer, E. ; Asplund, M. LU ; Keller, S. ; Sharma, S. LU ; Zucker, D. B. and Zwitter, T. , et al. (2015) In Monthly Notices of the Royal Astronomical Society 449(3).
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 ~ 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... (More)

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 ~ 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 ~ 14. The HERMES spectra of FGK stars contain absorption lines from 29 elements including light proton-capture elements, α-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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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Galaxy, Stellar content
in
Monthly Notices of the Royal Astronomical Society
volume
449
issue
3
article number
stv327
publisher
Oxford University Press
external identifiers
  • scopus:84938397753
ISSN
0035-8711
DOI
10.1093/mnras/stv327
language
English
LU publication?
yes
id
ea2e5ed1-8b9d-490d-af68-842cb2814690
date added to LUP
2019-05-29 19:35:54
date last changed
2022-12-07 21:25:38
@article{ea2e5ed1-8b9d-490d-af68-842cb2814690,
  abstract     = {{<p>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 ~ 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 ~ 14. The HERMES spectra of FGK stars contain absorption lines from 29 elements including light proton-capture elements, α-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.</p>}},
  author       = {{De Silva, G. M. and Freeman, K. C. and Bland-Hawthorn, J. and Martell, S. and Wylie de Boer, E. and Asplund, M. and Keller, S. and Sharma, S. and Zucker, D. B. and Zwitter, T. and Anguiano, B. and Bacigalupo, C. and Bayliss, D. and Beavis, M. A. and Bergemann, M. and Campbell, S. and Cannon, R. and Carollo, D. and Casagrande, L. and Casey, A. R. and Da Costa, G. and D'Orazi, V. and Dotter, A. and Duong, L. and Heger, A. and Ireland, M. J. and Kafle, P. R. and Kos, J. and Lattanzio, J. and Lewis, G. F. and Lin, J. and Lind, K. and Munari, U. and Nataf, D. M. and O'Toole, S. and Parker, Q. and Reid, W. and Schlesinger, K. J. and Sheinis, A. and Simpson, J. D. and Stello, D. and Ting, Y. S. and Traven, G. and Watson, F. and Wittenmyer, R. and Yong, D. and Žerjal, M.}},
  issn         = {{0035-8711}},
  keywords     = {{Galaxy; Stellar content}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{3}},
  publisher    = {{Oxford University Press}},
  series       = {{Monthly Notices of the Royal Astronomical Society}},
  title        = {{The GALAH survey : Scientific motivation}},
  url          = {{http://dx.doi.org/10.1093/mnras/stv327}},
  doi          = {{10.1093/mnras/stv327}},
  volume       = {{449}},
  year         = {{2015}},
}