Measuring baryon acoustic oscillations with angular two-point
  correlation function
  The Baryon Acoustic Oscillations (BAO) imprinted a characteristic correlation
length in the large-scale structure of the universe that can be used as a
standard ruler for mapping out the cosmic expansion history. Here, we discuss
the application of the angular two-point correlation function, $w(\theta)$, to
a sample of luminous red galaxies of the Sloan Digital Sky Survey (SDSS) and
derive two new measurements of the BAO angular scale at $z = 0.235$ and $z =
0.365$. Since noise and systematics may hinder the identification of the BAO
signature in the $w - \theta$ plane, we also introduce a potential new method
to localize the acoustic bump in a model-independent way. We use these new
measurements along with previous data to constrain cosmological parameters of
dark energy models and to derive a new estimate of the acoustic scale $r_s$.
