Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Detecting Dark Matter Substructures around the Milky Way with Gaia   Cold Dark Matter (CDM) theory, a pillar of modern cosmology and astrophysics,
predicts the existence of a large number of starless dark matter halos
surrounding the Milky Way (MW). However, clear observational evidence of these
"dark" substructures remains elusive. Here, we present a detection method based
on the small, but detectable, velocity changes that an orbiting substructure
imposes on the stars in the MW disk. Using high-resolution numerical
simulations we estimate that the new space telescope Gaia should detect the
kinematic signatures of a few starless substructures provided the CDM paradigm
holds. Such a measurement will provide unprecedented constraints on the
primordial matter power spectrum at low-mass scales and offer a new handle onto
the particle physics properties of dark matter.

1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ