Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stellar orbital properties as diagnostics of the origin of the stellar
  halo   We examine metallicities, ages and orbital properties of halo stars in a
Milky-Way like disk galaxy formed in the cosmological hydrodynamical MaGICC
simulations. Halo stars were either accreted from satellites or they formed in
situ in the disk or bulge of the galaxy and were then kicked up into the halo
("in situ/ kicked-up" stars). Regardless of where they formed both types show
surprisingly similar orbital properties: the majority of stars of both types
are on short-axis tubes with the same sense of rotation as the disk -- implying
that a large fraction of satellites are accreted onto the halo with the same
sense of angular momentum as the disk.

1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph