Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two flavor color superconductivity and compact stars   Baryonic matter at high density and low temperature is a color
superconductor. In real world, this state of matter may naturally appear inside
compact stars. A construction of a hybrid compact star with two flavor color
superconducting quark matter in its interior is presented.

7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
1
The categories of this paper are: cs
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas