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The Gaia-ESO Survey: the selection function of the Milky Way field stars

Stonkute, E and Koposov, SE and Howes, LM and Feltzing, S and Worley, CC and Gilmore, G and Ruchti, GR and Kordopatis, G and Randich, S and Zwitter, T and Bensby, T and Bragaglia, A and Smiljanic, R and Costado, MT and Tautvaisiene, G and Casey, AR and Korn, AJ and Lanzafame, AC and Pancino, E and Franciosini, E and Hourihane, A and Jofre, P and Lardo, C and Lewis, J and Magrini, L and Monaco, L and Morbidelli, L and Sacco, GG and Sbordone, L (2016) The Gaia-ESO Survey: the selection function of the Milky Way field stars. Monthly Notices of the Royal Astronomical Society, 460 (1). pp. 1131-1146. ISSN 0035-8711

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Abstract

The Gaia-ESO Survey was designed to target all major Galactic components (i.e. bulge, thin and thick discs, halo and clusters), with the goal of constraining the chemical and dynamical evolution of the Milky Way. This paper presents the methodology and considerations that drive the selection of the targeted, allocated and successfully observed Milky Way field stars. The detailed understanding of the survey construction, specifically the influence of target selection criteria on observed Milky Way field stars is required in order to analyse and interpret the survey data correctly. We present the target selection process for the Milky Way field stars observed with Very Large Telescope/Fibre Large Array Multi Element Spectrograph and provide the weights that characterize the survey target selection. The weights can be used to account for the selection effects in the Gaia-ESO Survey data for scientific studies. We provide a couple of simple examples to highlight the necessity of including such information in studies of the stellar populations in the Milky Way.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical And Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 01 Dec 2016 12:08
Last Modified: 13 Sep 2017 19:29
DOI or Identification number: 10.1093/mnras/stw1011
URI: http://researchonline.ljmu.ac.uk/id/eprint/4839

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