Observational constraints on freezing quintessence in a non-linear $f(R, L_m)$ gravity
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916523365367808 |
|---|---|
| author | Myrzakulov, Yerlan Koussour, M. Caliskan, A. Güdekli, E. Muminov, S. Rayimbaev, J. |
| author_facet | Myrzakulov, Yerlan Koussour, M. Caliskan, A. Güdekli, E. Muminov, S. Rayimbaev, J. |
| contents | In this paper, we investigate the freezing quintessence scenario in late-time cosmic expansion using a non-linear $f(R, L_m)$ gravity model, $f(R,L_m)=\frac{R}{2}+L_m^α$, where $α$ is a free parameter. We consider a solution for this model using an appropriate parametrization of the scale factor, and then the model is constrained by observational datasets, including CC, Pantheon+ (SN), and CC+SN+BAO. Our analysis yields results aligning closely with observational data. The Hubble parameter, deceleration parameter, matter-energy density, and EoS parameter of our model exhibit expected trends over cosmic time, supporting its physical validity. Furthermore, the model demonstrates consistency with the $Λ$CDM model in late times, displaying freezing behavior in the $ω- ω'$ plane and stability against density perturbations. Our findings suggest that the modified $f(R, L_m)$ gravity model is a credible approach to describing the universe's accelerating phase. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_10518 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Observational constraints on freezing quintessence in a non-linear $f(R, L_m)$ gravity Myrzakulov, Yerlan Koussour, M. Caliskan, A. Güdekli, E. Muminov, S. Rayimbaev, J. Cosmology and Nongalactic Astrophysics In this paper, we investigate the freezing quintessence scenario in late-time cosmic expansion using a non-linear $f(R, L_m)$ gravity model, $f(R,L_m)=\frac{R}{2}+L_m^α$, where $α$ is a free parameter. We consider a solution for this model using an appropriate parametrization of the scale factor, and then the model is constrained by observational datasets, including CC, Pantheon+ (SN), and CC+SN+BAO. Our analysis yields results aligning closely with observational data. The Hubble parameter, deceleration parameter, matter-energy density, and EoS parameter of our model exhibit expected trends over cosmic time, supporting its physical validity. Furthermore, the model demonstrates consistency with the $Λ$CDM model in late times, displaying freezing behavior in the $ω- ω'$ plane and stability against density perturbations. Our findings suggest that the modified $f(R, L_m)$ gravity model is a credible approach to describing the universe's accelerating phase. |
| title | Observational constraints on freezing quintessence in a non-linear $f(R, L_m)$ gravity |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2412.10518 |