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Volume 7
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10.3390/universe7030057
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Article

Cosmological Constraints on the Coupling Model from Observational Hubble Parameter and Baryon Acoustic Oscillation Measurements

by
Shulei Cao
1,2,
Tong-Jie Zhang
1,3,*,
Xinya Wang
4 and
Tingting Zhang
5
1
Department of Astronomy, Beijing Normal University, Beijing 100875, China
2
Department of Physics, Kansas State University, 116 Cardwell Hall, Manhattan, KS 66502, USA
3
Institute for Astronomical Science, Dezhou University, Dezhou 253023, China
4
Department of Industrial and Manufacturing Systems Engineering, Kansas State University, Manhattan, KS 66506, USA
5
PLA Army Engineering University, Nanjing 210017, China
*
Author to whom correspondence should be addressed.
Universe 2021, 7(3), 57; https://doi.org/10.3390/universe7030057
Submission received: 29 January 2021 / Revised: 26 February 2021 / Accepted: 2 March 2021 / Published: 5 March 2021
(This article belongs to the Section Cosmology)
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Abstract

In the paper, we consider two models in which dark energy is coupled with either dust matter or dark matter, and discuss the conditions that allow more time for structure formation to take place at high redshifts. These models are expected to have a larger age of the universe than that of ΛCDM [universe consists of cold dark matter (CDM) and dark energy (a cosmological constant, Λ)], so it can explain the formation of high redshift gravitationally bound systems which the ΛCDM model cannot interpret. We use the observational Hubble parameter data (OHD) and Hubble parameter obtained from cosmic chronometers method (H(z)) in combination with baryon acoustic oscillation (BAO) data to constrain these models. With the best-fitting parameters, we discuss how the age, the deceleration parameter, and the energy density parameters evolve in the new universes, and compare them with that of ΛCDM.
Keywords: dark energy; cosmological parameters; cosmology: observations dark energy; cosmological parameters; cosmology: observations

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MDPI and ACS Style

Cao, S.; Zhang, T.-J.; Wang, X.; Zhang, T. Cosmological Constraints on the Coupling Model from Observational Hubble Parameter and Baryon Acoustic Oscillation Measurements. Universe 2021, 7, 57. https://doi.org/10.3390/universe7030057

AMA Style

Cao S, Zhang T-J, Wang X, Zhang T. Cosmological Constraints on the Coupling Model from Observational Hubble Parameter and Baryon Acoustic Oscillation Measurements. Universe. 2021; 7(3):57. https://doi.org/10.3390/universe7030057

Chicago/Turabian Style

Cao, Shulei, Tong-Jie Zhang, Xinya Wang, and Tingting Zhang. 2021. "Cosmological Constraints on the Coupling Model from Observational Hubble Parameter and Baryon Acoustic Oscillation Measurements" Universe 7, no. 3: 57. https://doi.org/10.3390/universe7030057

APA Style

Cao, S., Zhang, T.-J., Wang, X., & Zhang, T. (2021). Cosmological Constraints on the Coupling Model from Observational Hubble Parameter and Baryon Acoustic Oscillation Measurements. Universe, 7(3), 57. https://doi.org/10.3390/universe7030057

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