The observational constraints on the flat $$\phi $$CDM models

Avsajanishvili, Olga; Huang, Yi‐Wen; Samushia, Lado; Kahniashvili, Tina

doi:10.1140/epjc/s10052-018-6233-y

Cited by 13 publications

(15 citation statements)

References 54 publications

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“…Observational constraints on scalar field cosmological models have been recently investigated in [2]. Using the Bayesian methods different models of the scalar field cosmology were analysed.…”

Section: Introductionmentioning

confidence: 99%

Bifurcations in Ratra–Peebles quintessence models and their extensions

Humieja

Szydłowski

2019

Eur. Phys. J. C

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We have used the dynamical system approach in order to investigate the dynamics of cosmological models of the flat Universe with a non-minimally coupled canonical and phantom scalar field and the Ratra-Peebles potential. Applying methods of the bifurcation theory we have found three cases for which the Universe undergoes a generic evolution emerging from either the de Sitter or the static Universe state and finishing at the de Sitter state, without the presence of the initial singularity. This generic class of solutions explains both the inflation and the late-time acceleration of the Universe. In this class inflation is an endogenous effect of dynamics itself.

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Section: Introductionmentioning

confidence: 99%

Bifurcations in Ratra–Peebles quintessence models and their extensions

Humieja

Szydłowski

2019

Eur. Phys. J. C

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“…V φ , ten different quintessence models are suggested by [36]. Here we start from Equation (12) in [37] where…”

Section: ϕCdm Cosmologymentioning

confidence: 99%

Sparse Formulae for the Distance Modulus in Cosmology

Zaninetti¹

2021

JHEPGC

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We review the distance modulus in twelve different cosmologies: the ΛCDM model, the wCDM model, the Cardassian model, the flat case, the ϕCDM cosmology, the Einstein-De Sitter model, the modified Einstein-De Sitter model, the simple GR model, the flat expanding model, the Milne model, the plasma model and the modified tired light model. The above distance moduli are processed for three different compilations of supernovae and a supernovae + GRBs compilation: Union 2.1, JLA, the Pantheon and Union 2.1 + 59 GRBs. For each of the 48 analysed cases we report the relative cosmological parameters, the chi-square, the reduced chi-square, the AIC and the Q parameter. The angular distance as function of the redshift for five cosmologies is reported in the framework of the minimax approximation.

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“…Primordial magnetic fields are the subject of research which includes main characteristics of inflational magnetic field evolution (Brandenburg et al 2017, their statistical properties and applications to cosmology (Brandenburg et al 2018). The dark energy models are studied and their testings are carried out (Avsajanishvili et al 2017, Avsajanishvili et al 2018).…”

Section: Theoretical Astrophysicsmentioning

confidence: 99%

Astronomical Research and Outreach in Georgia

Todua¹

2018

ComBAO

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Interest in astronomy has been significantly increased in Georgia. As a result, the development of astronomical research, education and public outreach are in progress. In Abastumani Astrophysical Observatory - a research institution at Ilia State University - the observational and theoretical studies comprise a wide range of topics in astronomy and adjacent fields: solar system bodies, solar physics, stellar and extragalactic astronomy, theoretical astrophysics, cosmology, atmospheric and near space physics. Georgian scientists are involved in wide international collaboration and participate in a number of networks and projects. Astronomical education at bachelor, master and doctoral levels are held at Ilia University. PhD programs are also offered at other universities. In 2018, under the financial support of the World Bank and Georgian government, the renovation of Abastumani Observatory has been started. International conferences and workshops have been carried out in Georgia. Excursions at the Observatory and public lectures in astronomy throughout the country are carried out. Amateur astronomers organize astronomical events. A private observatory is under construction near Tbilisi. All these puts better perspective for future development of astronomy in Georgia.

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The observational constraints on the flat $$\phi $$CDM models

Cited by 13 publications

References 54 publications

Bifurcations in Ratra–Peebles quintessence models and their extensions

Bifurcations in Ratra–Peebles quintessence models and their extensions

Sparse Formulae for the Distance Modulus in Cosmology

Astronomical Research and Outreach in Georgia

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