Testing nonstandard cosmological models with SNLS3 supernova data and
  other cosmological probes
  We investigate the implications for some nonstandard cosmological models
using data from the first three years of the Supernova Legacy Survey (SNLS3),
assuming a spatially flat universe. A comparison between the constraints from
the SNLS3 and those from other SN Ia samples, such as the ESSENCE, Union2,
SDSS-II and Constitution samples, is given and the effects of different
light-curve fitters are considered. We find that SN Ia with SALT2 or SALT or
SIFTO can give consistent results and the tensions between different data sets
and different light-curve fitters are obvious for fewer-free-parameters models.
At the same time, we also study the constraints from the SNLS3 along with data
from the cosmic microwave background and the baryonic acoustic oscillations
(CMB/BAO), and the latest Hubble parameter versus redshift (H(z)). Using model
selection criteria such as $\chi^2$/dof, GoF, AIC and BIC, we find that, among
all the cosmological models considered here ($\Lambda$CDM, constant $w$,
varying $w$, DGP, modified polytropic Cardassian, and the generalized Chaplygin
gas), the flat DGP is favored by the SNLS3 alone. However, when additional
CMB/BAO or H(z) constraints are included, this is no longer the case, and the
flat $\Lambda$CDM becomes preferred.
