Observational Constraints on Early Coupled Quintessence
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866916109575258112 |
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| author | Goh, Lisa W. K. Bachs-Esteban, Joan Gómez-Valent, Adrià Pettorino, Valeria Rubio, Javier |
| author_facet | Goh, Lisa W. K. Bachs-Esteban, Joan Gómez-Valent, Adrià Pettorino, Valeria Rubio, Javier |
| contents | We investigate an Early Coupled Quintessence model where a light scalar mediates a fifth force stronger than gravity among dark matter particles and leads to the growth of perturbations prior to matter-radiation equality. Using cosmological data from the $\textit{Planck}$ Cosmic Microwave Background power spectra, the Pantheon+ Type 1a Supernovae, Baryon Acoustic Oscillations, and Big Bang Nucleosynthesis, we constrain the coupling strength $β$ and the redshift $z_{\rm OFF}$ at which the interaction becomes effectively inactive, finding a firm degeneracy between these two parameters which holds true regardless of when the scaling regime begins. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_06406 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observational Constraints on Early Coupled Quintessence Goh, Lisa W. K. Bachs-Esteban, Joan Gómez-Valent, Adrià Pettorino, Valeria Rubio, Javier Cosmology and Nongalactic Astrophysics We investigate an Early Coupled Quintessence model where a light scalar mediates a fifth force stronger than gravity among dark matter particles and leads to the growth of perturbations prior to matter-radiation equality. Using cosmological data from the $\textit{Planck}$ Cosmic Microwave Background power spectra, the Pantheon+ Type 1a Supernovae, Baryon Acoustic Oscillations, and Big Bang Nucleosynthesis, we constrain the coupling strength $β$ and the redshift $z_{\rm OFF}$ at which the interaction becomes effectively inactive, finding a firm degeneracy between these two parameters which holds true regardless of when the scaling regime begins. |
| title | Observational Constraints on Early Coupled Quintessence |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2308.06406 |