https://doi.org/10.1140/epjc/s10052-019-7508-7
Regular Article - Theoretical Physics
Reconstruction of the cosmic equation of state for high redshift
1
Departamento de Física, Nucleo Cosmo-ufes, Universidade Federal do Espirito Santo, Vitǿria, ES, 29075-910, Brasil
2
National Research Nuclear University MEPhI, Kashirskoe sh. 31, Moscow, 115409, Russia
* e-mail: alan.toribio@ufes.br
Received:
14
May
2019
Accepted:
23
November
2019
Published online:
13
December
2019
We investigate the possibilities of reconstructing the cosmic equation of state (EoS) for high redshift. In order to obtain general results, we use two model-independent approaches. The first reconstructs the EoS using comoving distance and the second makes use of the Hubble parameter data. To implement the first method, we use a recent set of Gamma-Ray Bursts (GRBs) measures. To implement the second method, we generate simulated data using the Sandage–Loeb (SL) effect; for the fiducial model, we use the 
model. In both cases, the statistical analysis is conducted through the Gaussian processes (non-parametric). In general, we demonstrate that this methodology for reconstructing the EoS using a non-parametric method plus a model-independent approach works appropriately due to the feasibility of calculation and the ease of introducing a priori information (
and 
). In the near future, following this methodology with a higher number of high quality data will help obtain strong restrictions for the EoS.
© The Author(s), 2019
