Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chemical Abundances of Seven Outer Halo M31 Globular Clusters from the
  Pan-Andromeda Archaeological Survey   Observations of stellar streams in M31's outer halo suggest that M31 is
actively accreting several dwarf galaxies and their globular clusters (GCs).
Detailed abundances can chemically link clusters to their birth environments,
establishing whether or not a GC has been accreted from a satellite dwarf
galaxy. This talk presents the detailed chemical abundances of seven M31 outer
halo GCs (with projected distances from M31 greater than 30 kpc), as derived
from high-resolution integrated-light spectra taken with the Hobby Eberly
Telescope. Five of these clusters were recently discovered in the Pan-Andromeda
Archaeological Survey (PAndAS)---this talk presents the first determinations of
integrated Fe, Na, Mg, Ca, Ti, Ni, Ba, and Eu abundances for these clusters.
Four of the target clusters (PA06, PA53, PA54, and PA56) are metal-poor
($[\rm{Fe/H}] < -1.5$), $\alpha$-enhanced (though they are possibly less
alpha-enhanced than Milky Way stars at the 1 sigma level), and show signs of
star-to-star Na and Mg variations. The other three GCs (H10, H23, and PA17) are
more metal-rich, with metallicities ranging from [Fe/H] = -1.4 to -0.9. While
H23 is chemically similar to Milky Way field stars, Milky Way GCs, and other
M31 clusters, H10 and PA17 have moderately-low [Ca/Fe], compared to Milky Way
field stars and clusters. Additionally, PA17's high [Mg/Ca] and [Ba/Eu] ratios
are distinct from Milky Way stars, and are in better agreement with the stars
and clusters in the Large Magellanic Cloud (LMC). None of the clusters studied
here can be conclusively linked to any of the identified streams from PAndAS;
however, based on their locations, kinematics, metallicities, and detailed
abundances, the most metal-rich PAndAS clusters H23 and PA17 may be associated
with the progenitor of the Giant Stellar Stream, H10 may be associated with the
SW Cloud, and PA53 and PA56 may be associated with the Eastern Cloud.

35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci