Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of non-vanishing dark matter pressure in the Milky Way galaxy   We consider the possibility that the Milky Way's dark matter halo possesses a
non vanishing equation of state. Consequently, we evaluate the contribution due
to the speed of sound, assuming that the dark matter content of the galaxy
behaves like a fluid with pressure. In particular, we model the dark matter
distribution via an exponential sphere profile in the galactic core, and inner
parts of the galaxy whereas we compare the exponential sphere with three
widely-used profiles for the halo, i.e. the Einasto, Burkert and Isothermal
profile. For the galactic core we also compare the effects due to a dark matter
distribution without black hole with the case of a supermassive black hole in
vacuum and show that present observations are unable to distinguish them.
Finally we investigate the expected experimental signature provided by
gravitational lensing due to the presence of dark matter in the core.

16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org