Observational constraints on Gauss-Bonnet cosmology

被引：50

作者：

Benetti, Micol ^{[1
]}

da Costa, Simony Santos ^{[1
,2
]}

Capozziello, Salvatore ^{[2
,3
,4
,5
]}

Alcaniz, Jailson S. ^{[1
,6
,7
]}

De laurentis, Mariafelicia ^{[8
,9
,10
]}

机构：

[1] Observ Nacl, Dept Astron, BR-20921400 Rio De Janeiro, RJ, Brazil

[2] Univ Napoli Federico II, Dipartimento Fis E Pancini, Via Cinthia, I-80126 Naples, Italy

[3] INFN, Sez Napoli, Via Cinthia 9, I-80126 Naples, Italy

[4] Gran Sasso Sci Inst, Via F Crispi 7, I-67100 Laquila, Italy

[5] Lepage Res Inst, Ul 17 Novembra 1, Presov 08116, Slovakia

[6] Univ Fed Rio Grande do Norte, Dept Fis, BR-59072970 Natal, RN, Brazil

[7] McGill Univ, Phys Dept, Montreal, PQ H3A 2T8, Canada

[8] Goethe Univ, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany

[9] Tomsk State Pedag Univ, Tomsk 634061, Russia

[10] Tomsk State Univ Control Syst & Radioelect TUSUR, Lab Theor Cosmol, Tomsk 634050, Russia

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2018年 / 27卷 / 08期

关键词：

Modified theories of gravity; observational cosmology; exact solutions; INFLATIONARY UNIVERSE SCENARIO; PROBE WMAP OBSERVATIONS; MODIFIED GRAVITY; PHASE-TRANSITION; POWER SPECTRUM; EXTENDED THEORIES; DYNAMICS; FLUCTUATIONS; GALAXIES; FLATNESS;

D O I：

10.1142/S0218271818500840

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze a fully geometric approach to dark energy in the framework of F(R, G) theories of gravity, where R is the Ricci curvature scalar and G is the Gauss-Bonnet topological invariant. The latter invariant naturally exhausts, together with R, the whole curvature content related to curvature invariants coming from the Riemann tensor. In particular, we study a class of F(R, G) models with power law solutions and find that, depending on the value of the geometrical parameter, a shift in the anisotropy peaks position of the temperature power spectrum is produced, as well as an increasing in the matter power spectrum amplitude. This fact could be extremely relevant to fix the form of the F(R, G) model. We also perform an MCMC analysis using both Cosmic Microwave Background data by the Planck (2015) release and the Joint Light-Curve Analysis of the SNLS-SDSS collaborative effort, combined with the current local measurements of the Hubble value, H-0, and galaxy data from the Sloan Digital Sky Survey (BOSS CMASS DR11). We show that such a model can describe the CMB data with slightly high H-0 values, and the prediction on the amplitude matter spectrum value is proved to be in accordance with the observed matter distribution of the universe. At the same time, the value constrained for the geometric parameter implies a density evolution of such a component that is growing with time.

引用

页数：14

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