With the aim of probing the properties of the bright end of the Pristine survey and its effectiveness in selecting metal-poor stars, we selected a sample of bright candidate metal-poor stars combining Pristine CaHK photometry with APASS gi photometry, before the Gaia second data release became available. These stars were observed with the...
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2019 (v1)Journal articleUploaded on: December 4, 2022
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March 11, 2020 (v1)Journal article
The Pristine survey uses narrow-band photometry to derive precise metallicities down to the extremely metal-poor regime ( [Fe/H] < -3), and currently consists of over 4 million FGK-type stars over a sky area of ˜ 2500 deg^2. We focus our analysis on a subsample of ˜80 000 main-sequence turn-off stars with heliocentric distances between 6 and 20...
Uploaded on: December 3, 2022 -
June 27, 2010 (v1)Conference paper
We present the scientific motivations for GYES: a high multiplex (of the order of several hundred), high resolution (about 20 000), spectrograph to be placed at the prime focus of the CFHT. The main purpose of such an instrument is to conduct a spectroscopic survey complementary to the Gaia mission. The final Gaia catalogue (expected around...
Uploaded on: December 4, 2022 -
2010 (v1)Conference paper
We have chosen the name of GYES, one of the mythological giants with one hundred arms, offspring of Gaia and Uranus, for our instrument study of a multifibre spectrograph for the prime focus of the Canada-France-Hawaii Telescope. Such an instrument could provide an excellent ground-based complement for the Gaia mission and a northern complement...
Uploaded on: December 4, 2022