Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radio Galaxy Redshift-Angular Size Data Constraints on Dark Energy   We use FRIIb radio galaxy redshift-angular size data to constrain
cosmological parameters in a dark energy scalar field model. The derived
constraints are consistent with but weaker than those determined using Type Ia
supernova redshift-magnitude data.

16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con