Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Axion Bose-Einstein Condensation: a model beyond Cold Dark Matter   Cold dark matter axions form a Bose-Einstein condensate if the axions
thermalize. Recently, it was found that they do thermalize when the photon
temperature reaches T ~ 100 eV(f/10^12GeV)^1/2 and that they continue to do so
thereafter. We discuss the differences between axion BEC and CDM in the linear
regime and the non-linear regime of evolution of density perturbations. We find
that axion BEC provides a mechanism for the production of net overall rotation
in dark matter halos, and for the alignment of cosmic microwave anisotropy
multi-poles.

17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con