Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Pristine survey -- XV. A CFHT ESPaDOnS view on the Milky Way halo
  and disc populations   We present a one-dimensional, local thermodynamic equilibrium (1D-LTE)
homogeneous analysis of 132 stars observed at high-resolution with ESPaDOnS.
This represents the largest sample observed at high resolution (R$\sim$40,000)
from the Pristine survey. This sample is based on the first version of the
Pristine catalog and covers the full range of metallicities from [Fe/H]$\sim
-3$ to $\sim +0.25$, with nearly half of our sample (58 stars) composed of very
metal-poor stars ([Fe/H] $\le$ $-$2). This wide range of metallicities provides
the opportunity of a new detailed study of the Milky Way stellar population.
Because it includes both dwarf and giant stars, it also enables the analysis of
any potential bias induced by the Pristine selection process. Based on Gaia
EDR3, the orbital analysis of this Pristine$-$Espadons sample shows that it is
composed of 65 halo stars and 67 disc stars. After a general assessment of the
sample chemical properties with the $\alpha$-elements Mg and Ca, we focus on
the abundance of carbon and the neutron capture elements Ba and Sr. While most
of our very metal-poor subsample is carbon normal, we also find that 14 stars
out of the 38 stars with [Fe/H] $\leq$ $-$2 and measured carbon abundances turn
out to be carbon enhanced metal-poor (CEMP) stars. We show that these CEMP
stars are nearly exclusively (i.e. 12 stars out of 14) in the regime of low
luminosity, unevolved, dwarf stars, which we interpret as the consequence of
bias of the Pristine filter against C-rich giants. Among the very metal-poor
(VMP) stars, we identify 2 CEMP stars with no enhancement in neutron-capture
process elements (CEMP-no) and another one enriched in s-process element
(CEMP-s). Finally, one VMP star is found with a very low [Sr/Fe] abundance
ratio for its metallicity, as expected if it had been accreted from an
ultra-faint dwarf galaxy.

18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
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The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph