| Full text | |
| Author(s): |
Nunes, Rafael C.
;
Yadav, Santosh K.
;
Jesus, J. F.
;
Bernui, Armando
Total Authors: 4
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 497, n. 2, p. 9-pg., 2020-09-01. |
| Abstract | |
We investigate observational constraints on cosmological parameters combining 15 measurements of the transversal BAO scale (obtained free of any fiducial cosmology) with Planck-CMB data to explore the parametric space of some cosmological models. We investigate how much Planck + transversal BAO data can constraint the minimum Lambda cold dark matter (Lambda CDM) model, and extensions, including neutrinos mass scale M-nu, and the possibility for a dynamical dark energy (DE) scenario. Assuming the Lambda CDM cosmology, we find H-0 = 69.23 +/- 0.50 km s(-1) Mpc(-1), M-nu < 0.11 eV, and r(drag) = 147.59 +/- 0.26 Mpc (the sound horizon at drag epoch) from Planck + transversal BAO data. When assuming a dynamical DE cosmology, we find that the inclusion of the BAO data can indeed break the degeneracy of the DE free parameters, improving the constraints on the full parameter space significantly. We note that the model is compatible with local measurements of H-0 and there is no tension on H-0 estimates in this dynamical DE context. Also, we discuss constraints and consequences from a joint analysis with the local H-0 measurement from SH0ES. Finally, we perform a model-independent analysis for the deceleration parameter, q(z), using only information from transversal BAO data. (AU) | |
| FAPESP's process: | 18/18036-5 - Investigating physical aspects beyond the standard model linked to the themes of dark energy, modified gravity, neutrinos and gravitational waves |
| Grantee: | Rafael da Costa Nunes |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |