ABSTRACT We evaluate the rotational velocity of stars observed by the Pristine survey towards the Galactic anticentre spanning a wide range of metallicities from the extremely metal-poor regime ([Fe/H] < −3) to nearly solar metallicity. In the Galactic anticentre direction, the rotational velocity (Vϕ) is similar to the tangential velocity in...
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November 5, 2021 (v1)Journal articleUploaded on: December 4, 2022
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July 1, 2021 (v1)Journal article
The most metal-deficient stars hold important clues about the early buildup and chemical evolution of the Milky Way, and carbon-enhanced metal-poor (CEMP) stars are of special interest. However, little is known about CEMP stars in the Galactic bulge. In this paper, we use the large spectroscopic sample of metal-poor stars from the Pristine...
Uploaded on: December 4, 2022 -
September 14, 2021 (v1)Journal article
High-resolution optical spectra of 30 metal-poor stars selected from the Pristine survey are presented, based on observations taken with the Gemini Observatory GRACES spectrograph. Stellar parameters Teff and log g are determined using a Gaia DR2 colour–temperature calibration and surface gravity from the Stefan–Boltzmann equation. GRACES...
Uploaded on: December 3, 2022 -
August 21, 2020 (v1)Journal article
Metal-poor stars are important tools for tracing the early history of the Milky Way, and for learning about the first generations of stars. Simulations suggest that the oldest metal-poor stars are to be found in the inner Galaxy. Typical bulge surveys, however, lack low metallicity ([Fe/H]<−1.0) stars because the inner Galaxy is predominantly...
Uploaded on: December 4, 2022 -
December 11, 2018 (v1)Journal article
International audience
Uploaded on: December 4, 2022