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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2507.22191 |
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| _version_ | 1866908490585341952 |
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| author | Dhankar, Praveen Kumar Munyeshyaka, Albert Sanyal, Aritra Islam, Safiqul Rahaman, Farook |
| author_facet | Dhankar, Praveen Kumar Munyeshyaka, Albert Sanyal, Aritra Islam, Safiqul Rahaman, Farook |
| contents | In the present work, we incorporate redshift-space distortion measurement to investigate the growth of large scale structure within the framework of multi-fluid cosmology in the context of modified Gauss-Bonnet gravity. Using three different modified Gauss-Bonnet gravity models, we compare the predictions of modified Gauss-Bonnet gravity expansion history-through the Friedmann equation with Hubble and BAO data sets and constrain models parameters. Within the context of multi-fluid cosmology in modified Gauss-Bonnet gravity, we obtain the structure growth equation. This equation is then combined with Sigma_8 to get f_Sigma_8 predictions-which is compared with redshift-space distortion data to constrain models parameters to obtain best-fit values including Sigma_8. This involves performing a Markov Chain Monte Carlo (MCMC) analysis for these specific forms of modified Gauss-Bonnet models. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_22191 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Constraints on multi-fluid cosmology in modified Gauss-Bonnet gravity models with different observational data sets Dhankar, Praveen Kumar Munyeshyaka, Albert Sanyal, Aritra Islam, Safiqul Rahaman, Farook General Relativity and Quantum Cosmology In the present work, we incorporate redshift-space distortion measurement to investigate the growth of large scale structure within the framework of multi-fluid cosmology in the context of modified Gauss-Bonnet gravity. Using three different modified Gauss-Bonnet gravity models, we compare the predictions of modified Gauss-Bonnet gravity expansion history-through the Friedmann equation with Hubble and BAO data sets and constrain models parameters. Within the context of multi-fluid cosmology in modified Gauss-Bonnet gravity, we obtain the structure growth equation. This equation is then combined with Sigma_8 to get f_Sigma_8 predictions-which is compared with redshift-space distortion data to constrain models parameters to obtain best-fit values including Sigma_8. This involves performing a Markov Chain Monte Carlo (MCMC) analysis for these specific forms of modified Gauss-Bonnet models. |
| title | Constraints on multi-fluid cosmology in modified Gauss-Bonnet gravity models with different observational data sets |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2507.22191 |