BAO angular scale at z_eff = 0.11 with the SDSS blue galaxies. (arXiv:2103.14121v1 [astro-ph.CO])

BAO angular scale at z_eff = 0.11 with the SDSS blue galaxies. (arXiv:2103.14121v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Carvalho_E/0/1/0/all/0/1">E. de Carvalho</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Bernui_A/0/1/0/all/0/1">A. Bernui</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Avila_F/0/1/0/all/0/1">F. Avila</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Novaes_C/0/1/0/all/0/1">C. P. Novaes</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Nogueira_Cavalcante_J/0/1/0/all/0/1">J. P. Nogueira-Cavalcante</a>

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.

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