BAO angular scale at z_eff = 0.11 with the SDSS blue galaxies

Understand

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.