On the Evidence of Dynamical Dark Energy
To elucidate the robustness of the baryon acoustic oscillation (BAO) data measured by the dark energy spectroscopic instrument (DESI) in capturing the dynamical behavior of dark energy, we assess the model dependence of the evidence for dynamical dark energy inferred from the DESI BAO data. While th...
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MDPI AG
2024-12-01
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| author | Qing Gao Zhiqian Peng Shengqing Gao Yungui Gong |
| author_facet | Qing Gao Zhiqian Peng Shengqing Gao Yungui Gong |
| author_sort | Qing Gao |
| collection | DOAJ |
| description | To elucidate the robustness of the baryon acoustic oscillation (BAO) data measured by the dark energy spectroscopic instrument (DESI) in capturing the dynamical behavior of dark energy, we assess the model dependence of the evidence for dynamical dark energy inferred from the DESI BAO data. While the DESI BAO data slightly tightens the constraints on model parameters and increases the tension between the Chevallier–Polarski–Linder (CPL) model and the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mo>Λ</mo></semantics></math></inline-formula>CDM model, we find that the influence of DESI BAO data on the constraint of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>w</mi><mn>0</mn></msub></semantics></math></inline-formula> is small in the SSLCPL model. In comparison to the CPL model, the tension with the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mo>Λ</mo></semantics></math></inline-formula>CDM model is reduced for the SSLCPL model, suggesting that the evidence for dynamical dark energy from DESI BAO data is dependent on cosmological models. The inclusion of spatial curvature has little impact on the results in the SSLCPL model. |
| format | Article |
| id | doaj-art-7473d5f2b55f49dfbfd53d3745556b0b |
| institution | Kabale University |
| issn | 2218-1997 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Universe |
| spelling | doaj-art-7473d5f2b55f49dfbfd53d3745556b0b2025-01-24T13:51:28ZengMDPI AGUniverse2218-19972024-12-011111010.3390/universe11010010On the Evidence of Dynamical Dark EnergyQing Gao0Zhiqian Peng1Shengqing Gao2Yungui Gong3School of Physical Science and Technology, Southwest University, Chongqing 400715, ChinaSchool of Physical Science and Technology, Southwest University, Chongqing 400715, ChinaSchool of Physics, Huazhong University of Science and Technology, 1037 LuoYu Rd, Wuhan 430074, ChinaInstitute of Fundamental Physics and Quantum Technology, Department of Physics, School of Physical Science and Technology, Ningbo University, Ningbo 315211, ChinaTo elucidate the robustness of the baryon acoustic oscillation (BAO) data measured by the dark energy spectroscopic instrument (DESI) in capturing the dynamical behavior of dark energy, we assess the model dependence of the evidence for dynamical dark energy inferred from the DESI BAO data. While the DESI BAO data slightly tightens the constraints on model parameters and increases the tension between the Chevallier–Polarski–Linder (CPL) model and the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mo>Λ</mo></semantics></math></inline-formula>CDM model, we find that the influence of DESI BAO data on the constraint of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>w</mi><mn>0</mn></msub></semantics></math></inline-formula> is small in the SSLCPL model. In comparison to the CPL model, the tension with the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mo>Λ</mo></semantics></math></inline-formula>CDM model is reduced for the SSLCPL model, suggesting that the evidence for dynamical dark energy from DESI BAO data is dependent on cosmological models. The inclusion of spatial curvature has little impact on the results in the SSLCPL model.https://www.mdpi.com/2218-1997/11/1/10DESI BAO dataΛCDM modelCPL modelSSLCPL model |
| spellingShingle | Qing Gao Zhiqian Peng Shengqing Gao Yungui Gong On the Evidence of Dynamical Dark Energy Universe DESI BAO data ΛCDM model CPL model SSLCPL model |
| title | On the Evidence of Dynamical Dark Energy |
| title_full | On the Evidence of Dynamical Dark Energy |
| title_fullStr | On the Evidence of Dynamical Dark Energy |
| title_full_unstemmed | On the Evidence of Dynamical Dark Energy |
| title_short | On the Evidence of Dynamical Dark Energy |
| title_sort | on the evidence of dynamical dark energy |
| topic | DESI BAO data ΛCDM model CPL model SSLCPL model |
| url | https://www.mdpi.com/2218-1997/11/1/10 |
| work_keys_str_mv | AT qinggao ontheevidenceofdynamicaldarkenergy AT zhiqianpeng ontheevidenceofdynamicaldarkenergy AT shengqinggao ontheevidenceofdynamicaldarkenergy AT yunguigong ontheevidenceofdynamicaldarkenergy |