Cuceu, A;
Farr, J;
Lemos, P;
Font-Ribera, A;
(2019)
Baryon Acoustic Oscillations and the Hubble constant: past, present and future.
Journal of Cosmology and Astroparticle Physics
(10)
, Article 44. 10.1088/1475-7516/2019/10/044.
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Abstract
We investigate constraints on the Hubble constant (H_{0}) using Baryon Acoustic Oscillations (BAO) and baryon density measurements from Big Bang Nucleosynthesis (BBN). We start by investigating the tension between galaxy BAO measurements and those using the Lyman-α forest, within a Bayesian framework. Using the latest results from eBOSS DR14 we find that the probability of this tension being statistical is sime6.3% assuming flat ΛCDM. We measure H_{0} = 67.6±1.1 km s^{−1} Mpc^{−1}, with a weak dependence on the BBN prior used, in agreement with results from Planck Cosmic Microwave Background (CMB) results and in strong tension with distance ladder results. Finally, we forecast the future of BAO + BBN measurements of H^{0}, using the Dark Energy Spectroscopic Instrument (DESI). We find that the choice of BBN prior will have a significant impact when considering future BAO measurements from DESI.
| Type: | Article |
|---|---|
| Title: | Baryon Acoustic Oscillations and the Hubble constant: past, present and future |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/1475-7516/2019/10/044 |
| Publisher version: | https://doi.org/10.1088/1475-7516/2019/10/044 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | baryon acoustic oscillations, cosmological parameters from LSS, Lyman alpha forest |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10089018 |
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