| Full text | |
| Author(s): |
Avila, Felipe
[1]
;
Bernui, Armando
[1]
;
Nunes, Rafael C.
[2]
;
de Carvalho, Edilson
[3]
;
Novaes, Camila P.
[2]
Total Authors: 5
|
| Affiliation: | [1] Observ Nacl, Rua Gen Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ - Brazil
[2] Inst Nacl Pesquisas Espaciais, Av Astronautas 1758, Sao Jose Dos Campos, SP - Brazil
[3] Univ Estado Amazonas, Ctr Estudos Super Tabatinga, BR-69640000 Tabatinga, AM - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 509, n. 2, p. 2994-3003, JAN 2022. |
| Web of Science Citations: | 0 |
| Abstract | |
We propose a novel approach to obtain the growth rate of cosmic structures, f(z), from the evolution of the cosmic homogeneity scale, R-H(z). Ourmethodology needs two ingredients in a specific functional form: R-H(z) data and thematter two-point correlation function today, i.e. xi (r, z = 0). We use a Gaussian Process approach to reconstruct the function R-H. In the absence of suitable observational information of the matter correlation function in the local Universe, z similar or equal to 0, we assume a fiducial cosmology to obtain. (r, z = 0). For this reason, our final result turns out to be a consistency test of the cosmological model assumed. Our results show a good agreement between: (i) the growth rate f(RH) (z) obtained through our approach, (ii) the f(Lambda CDM)(z) expected in the fiducial model, and (iii) the best-fitting f(z) from data compiled in the literature. Moreover, using this data compilation, we perform a Gaussian Process to reconstruct the growth rate function f(data)(z) and compare it with the function f(RH)(z) finding a concordance of < 2 sigma, a good result considering the few data available for both reconstruction processes. With more accurate R-H(z) data, from forthcoming surveys, the homogeneity scale function might be better determined and would have the potential to discriminate between Lambda CDM and alternative scenarios as a new cosmological observable. (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 |