| Grant number: | 17/05859-0 |
| Support type: | Regular Research Grants |
| Duration: | July 01, 2017 - June 30, 2019 |
| Field of knowledge: | Physical Sciences and Mathematics - Astronomy - Extragalactic Astrophysics |
| Principal Investigator: | José Fernando de Jesus |
| Grantee: | José Fernando de Jesus |
| Home Institution: | Universidade Estadual Paulista (UNESP). Campus Experimental de Itapeva. Itapeva , SP, Brazil |
Abstract
In current Cosmology, the flat LCDM model has obtained a considerable success in reconciling observations of different natures, like cosmic expansion acceleration (as suggested from Supernova Ia observations), the Cosmic Microwave Background Power Spectrum, Structure Formation, Matter Power Spectrum, Baryon Acoustic Oscillations, and Total Age of Universe. However, such model suffers from some observational problems, like ages of old objects at high redshifts, predicted quantity of satellite galaxies and, mainly, two big theoretical problems, namely, the Cosmological Constant Problem and the Cosmic Coincidence Problem. Such problems have stimulated cosmologists and astronomers to propose alternative scenarios to the cosmic concordance model (LCDM).In this project we will perform a comparative study (of statistical character) among LCDM and the various alternative cosmologies existing in literature. We intend to compare the alternative cosmologies (XCDM, Scalar fields, Spinorial fields, Matter creation models etc.) not only by the light of the so called background observational tests, but also with tests involving higher orders of density perturbations. (AU)