BAO angular scale at z_eff = 0.11 with the SDSS blue galaxies
  We measure the transverse baryon acoustic oscillations (BAO) signal in the
local Universe using a sample of blue galaxies from the Sloan Digital Sky
Survey (SDSS) survey as a cosmological tracer. The method is weakly dependent
on a cosmological model and is suitable for 2D analyses in thin redshift bins
to investigate the SDSS data in the interval $z {\in} [0.105, 0.115]$. We
detect the transverse BAO signal ${\theta}_{BAO} = 19.8^{\deg} {\pm}
1.05^{\deg}$ at $z_{eff} = 0.11$, with a statistical significance of $2.2
{\sigma}$. Additionally, we perform tests that confirm the robustness of this
angular BAO signature. Supported by a large set of log-normal simulations, our
error analyses include statistical and systematic contributions. In addition,
considering the sound horizon scale calculated by the Planck Collaboration,
$r_{s}^{Planck}$, and the ${\theta}_{BAO}$ value obtained here, we obtain a
measurement of the angular diameter distance $D_{A}(0.11) = 258.31 {\pm} 13.71
\,Mpc/h$. Moreover, combining this ${\theta}_{BAO}$ measurement at low redshift
with other BAO angular scale data reported in the literature, we perform
statistical analyses for the cosmological parameters of some Lambda cold dark
matter (${\Lambda}$CDM) type models.
