Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of dark energy models: A perspective from the latest
  observational data   In this paper, we compare some popular dark energy models under the
assumption of a flat universe by using the latest observational data including
the type Ia supernovae Constitution compilation, the baryon acoustic
oscillation measurement from the Sloan Digital Sky Survey, the cosmic microwave
background measurement given by the seven-year Wilkinson Microwave Anisotropy
Probe observations and the determination of $H_0$ from the Hubble Space
Telescope. Model comparison statistics such as the Bayesian and Akaike
information criteria are applied to assess the worth of the models. These
statistics favor models that give a good fit with fewer parameters. Based on
this analysis, we find that the simplest cosmological constant model that has
only one free parameter is still preferred by the current data. For other
dynamical dark energy models, we find that some of them, such as the $\alpha$
dark energy, constant $w$, generalized Chaplygin gas,
Chevalliear-Polarski-Linder parametrization, and holographic dark energy
models, can provide good fits to the current data, and three of them, namely,
the Ricci dark energy, agegraphic dark energy, and Dvali-Gabadadze-Porrati
models, are clearly disfavored by the data.

30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin