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• W3190696671 abstract "Abstract The cosmography method is a model-independent technique used to reconstruct the Hubble expansion of the Universe at low redshifts. In this method, using the Hubble diagrams from Type Ia Supernovae (SNIa) in Pantheon catalog, quasars and Gamma-Ray Bursts (GRB), we put observational constraints on the cosmographic parameters in holographic dark energy (HDE) and concordance $$varLambda $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>Λ</mml:mi> </mml:math> CDM models by minimizing the error function $$chi ^2$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msup> <mml:mi>χ</mml:mi> <mml:mn>2</mml:mn> </mml:msup> </mml:math> based on the statistical Markov Chain Monte Carlo (MCMC) algorithm. Then, we compare the results of the models with the results of the model-independent cosmography method. Except for the Pantheon sample, we observe that there is a big tension between standard cosmology and Hubble diagram observations, while the HDE model remains consistent in all cases. Then we use different combinations of Hubble diagram data to reconstruct the Hubble parameter of the model and compare it with the observed Hubble data. We observe that the Hubble parameter reconstructed from the model-independent cosmography method has the smallest deviation from the Hubble data and the $$varLambda $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>Λ</mml:mi> </mml:math> CDM (HDE) model has the largest (middle) deviation, especially when we keep the observational data point $$226^{+8.0}_{-0.8}$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:msubsup> <mml:mn>226</mml:mn> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>0.8</mml:mn> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> <mml:mn>8.0</mml:mn> </mml:mrow> </mml:msubsup> </mml:math> at redshift $$z=2.36$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mrow> <mml:mi>z</mml:mi> <mml:mo>=</mml:mo> <mml:mn>2.36</mml:mn> </mml:mrow> </mml:math> in the analysis. On the contrary, in the redshift $$z <1$$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mrow> <mml:mi>z</mml:mi> <mml:mo><</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:math> , we see that the compatibility of $$varLambda $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>Λ</mml:mi> </mml:math> CDM cosmology and observation is even better than the model independent cosmography method." @default.
• W3190696671 created "2021-08-16" @default.
• W3190696671 creator A5039480812 @default.
• W3190696671 creator A5048450856 @default.
• W3190696671 date "2021-07-01" @default.
• W3190696671 modified "2023-09-27" @default.
• W3190696671 title "A new comparison between holographic dark energy and standard $$varLambda $$-cosmology in the context of cosmography method" @default.
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• W3190696671 doi "https://doi.org/10.1140/epjc/s10052-021-09393-1" @default.
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