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The accelerating universe: nature and tests of dark energy and dark matter

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)

Scientific publications (11)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
VALENTIM, R.; JESUS, J. F. Thermodynamic constraints on matter creation models. EUROPEAN PHYSICAL JOURNAL C, v. 80, n. 11 NOV 9 2020. Web of Science Citations: 0.
PEREIRA, S. H.; LIMA, R. DE C.; ALVES, M. E. S.; GUIMARAES, T. M.; JESUS, J. F.; SOUZA, A. P. S. Cosmology with mass dimension one fields: recent developments. European Physical Journal-Special Topics, v. 229, n. 11, SI, p. 2079-2116, SEP 2020. Web of Science Citations: 1.
JESUS, J. F.; VALENTIM, R.; ESCOBAL, A. A.; PEREIRA, S. H. Gaussian process estimation of transition redshift. Journal of Cosmology and Astroparticle Physics, n. 4 APR 2020. Web of Science Citations: 0.
PEREIRA, S. H.; LIMA, R. DE C.; JESUS, J. F.; HOLANDA, R. F. L. Acceleration in Friedmann cosmology with torsion. EUROPEAN PHYSICAL JOURNAL C, v. 79, n. 11 NOV 2019. Web of Science Citations: 0.
JESUS, J. F. EXACT SOLUTION FOR FLAT SCALE-INVARIANT COSMOLOGY. REVISTA MEXICANA DE ASTRONOMIA Y ASTROFISICA, v. 55, n. 1, p. 17-19, APR 2019. Web of Science Citations: 0.
BARANOV, IURI P. R.; JESUS, JOSE F.; LIMA, JOSE A. S. Testing creation cold dark matter cosmology with the radiation temperature-redshift relation. GENERAL RELATIVITY AND GRAVITATION, v. 51, n. 2 FEB 2019. Web of Science Citations: 0.
VALENTIM, R.; JESUS, J. F. Entropy and creation cold dark matter models. ASTRONOMISCHE NACHRICHTEN, v. 340, n. 1-3, SI, p. 105-107, JAN-MAR 2019. Web of Science Citations: 0.
JESUS, J. F.; GREGORIO, T. M.; ANDRADE-OLIVEIRA, F.; VALENTIM, R.; MATOS, C. A. O. Bayesian correction of H(z) data uncertainties. Monthly Notices of the Royal Astronomical Society, v. 477, n. 3, p. 2867-2873, JUL 2018. Web of Science Citations: 5.
JESUS, J. F.; HOLANDA, R. F. L.; PEREIRA, S. H. Model independent constraints on transition redshift. Journal of Cosmology and Astroparticle Physics, n. 5 MAY 2018. Web of Science Citations: 8.
JESUS, J. F.; HOLANDA, R. F. L.; DANTAS, M. A. Testing the cosmic conservation of photon number with type Ia supernovae and ages of old objects. GENERAL RELATIVITY AND GRAVITATION, v. 49, n. 12 DEC 2017. Web of Science Citations: 5.
JESUS, J. F.; VALENTIM, R.; ANDRADE-OLIVERA, F. Bayesian analysis of CCDM models. Journal of Cosmology and Astroparticle Physics, n. 9 SEP 2017. Web of Science Citations: 1.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.