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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2407.10845 |
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| _version_ | 1866917901288603648 |
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| author | Mukhopadhyay, Upala Haridasu, Sandeep Sen, Anjan A Dhawan, Suhail |
| author_facet | Mukhopadhyay, Upala Haridasu, Sandeep Sen, Anjan A Dhawan, Suhail |
| contents | We propose and implement a novel test to assess deviations from well-established concordance $Λ$CDM cosmology while inferring dark energy properties. In contrast to the commonly implemented parametric forms of the dark energy equation-of-state (EoS), we test the validity of the cosmological constant on the more fundamental scale factor [$a(t)$] which determines the expansion rate of the Universe. We constrain our extended `general model' using the late-time observables. The posterior of the dark energy EoS is mainly constrained to be quintessence-like naturally excluding physically unviable regions such as phantom crossings or exponential growth. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_10845 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Inferring dark energy properties from the scale factor parametrisation Mukhopadhyay, Upala Haridasu, Sandeep Sen, Anjan A Dhawan, Suhail Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology We propose and implement a novel test to assess deviations from well-established concordance $Λ$CDM cosmology while inferring dark energy properties. In contrast to the commonly implemented parametric forms of the dark energy equation-of-state (EoS), we test the validity of the cosmological constant on the more fundamental scale factor [$a(t)$] which determines the expansion rate of the Universe. We constrain our extended `general model' using the late-time observables. The posterior of the dark energy EoS is mainly constrained to be quintessence-like naturally excluding physically unviable regions such as phantom crossings or exponential growth. |
| title | Inferring dark energy properties from the scale factor parametrisation |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2407.10845 |