Regular Article – Theoretical Physics
BAO signatures in the 2-point angular correlations and the Hubble tension
Divisão de Astrofísica, Instituto Nacional de Pesquisas Espaciais, Avenida dos Astronautas 1758, 12227-010, São José dos Campos, SP, Brazil
2 Observatório Nacional, Rua General José Cristino 77, São Cristóvão, 20921-400, Rio de Janeiro, RJ, Brazil
Accepted: 24 October 2020
Published online: 5 November 2020
An observational tension on estimates of the Hubble parameter, , using early and late Universe information, is being of intense discussion in the literature. Additionally, it is of great importance to measure independently of CMB data and local distance ladder method. In this sense, we analyze 15 measurements of the transversal BAO scale, , obtained in a weakly model-dependent approach, in combination with other data sets obtained in a model-independent way, namely, Big Bang Nucleosynthesis (BBN) information, 6 gravitationally lensed quasars with measured time delays by the H0LiCOW team, and measures of cosmic chronometers (CC). We find km s Mpc and km s Mpc from +BBN+H0LiCOW and +BBN+CC, respectively, in fully accordance with local measurements. Moreover, we estimate the sound horizon at drag epoch, , independent of CMB data, and find Mpc (from +BBN+H0LiCOW) and Mpc (from +BBN+CC). In a second round of analysis, we test how the presence of a possible spatial curvature, , can influence the main results. We compare our constraints on and with other reported values. Our results show that it is possible to use a robust compilation of transversal BAO data, , jointly with other model-independent measurements, in such a way that the tension on the Hubble parameter can be alleviated.
© The Author(s) 2020
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