Cosmological model in modified Gauss-Bonnet gravity
In this work, the Gauss-Bonnet model of modified gravity is investigated, where some arbitrary function is added to the Einstein-Hilbert action. This theory explains the accelerated expansion of the Universe. In this work. The article proposes modified gravity, which considers two gravities and...
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| Format: | Article |
| Language: | English |
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Al-Farabi Kazakh National University
2024-12-01
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| Series: | Physical Sciences and Technology |
| Online Access: | https://phst.kaznu.kz/index.php/journal/article/view/432 |
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| author | Indira Nurat Shynaray Myrzakul Farida Belisarova |
| author_facet | Indira Nurat Shynaray Myrzakul Farida Belisarova |
| author_sort | Indira Nurat |
| collection | DOAJ |
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In this work, the Gauss-Bonnet model of modified gravity is investigated, where some arbitrary function is added to the Einstein-Hilbert action. This theory explains the accelerated expansion of the Universe. In this work. The article proposes modified gravity, which considers two gravities and , where is a function from the Ricci scalar, is a function from the Gauss-Bonnet invariant. The model is considered in a flat, isotropic and homogeneous Universe. As a result of some mathematical formalism, the dependence of the function on the scalar of curvature and on time is found. Geometric and dynamic parameters of the cosmological model were analyzed. Equations of motion and cosmological parameters, such as the Hubble parameter and scale factor, were obtained for the investigated model. Analyzing the obtained solutions of the scale factor, it was shown that the model describes the exponential acceleration of the Universe. Thus, it was found that the cosmological model under study has a similar interpretation to the de Sitter cosmological model.
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| format | Article |
| id | doaj-art-f656dc893c88444a9625f1812e1d664e |
| institution | Kabale University |
| issn | 2409-6121 2522-1361 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Al-Farabi Kazakh National University |
| record_format | Article |
| series | Physical Sciences and Technology |
| spelling | doaj-art-f656dc893c88444a9625f1812e1d664e2025-01-01T15:33:53ZengAl-Farabi Kazakh National UniversityPhysical Sciences and Technology2409-61212522-13612024-12-01113-210.26577/phst2024v11i2b011Cosmological model in modified Gauss-Bonnet gravityIndira Nurat0Shynaray Myrzakul1Farida Belisarova2L. N. Gumilyov Eurasian National University, Astana, KazakhstanL. N. Gumilyov Eurasian National University, Astana, KazakhstanAl-Farabi Kazakh National University, Almaty, Kazakhstan In this work, the Gauss-Bonnet model of modified gravity is investigated, where some arbitrary function is added to the Einstein-Hilbert action. This theory explains the accelerated expansion of the Universe. In this work. The article proposes modified gravity, which considers two gravities and , where is a function from the Ricci scalar, is a function from the Gauss-Bonnet invariant. The model is considered in a flat, isotropic and homogeneous Universe. As a result of some mathematical formalism, the dependence of the function on the scalar of curvature and on time is found. Geometric and dynamic parameters of the cosmological model were analyzed. Equations of motion and cosmological parameters, such as the Hubble parameter and scale factor, were obtained for the investigated model. Analyzing the obtained solutions of the scale factor, it was shown that the model describes the exponential acceleration of the Universe. Thus, it was found that the cosmological model under study has a similar interpretation to the de Sitter cosmological model. https://phst.kaznu.kz/index.php/journal/article/view/432 |
| spellingShingle | Indira Nurat Shynaray Myrzakul Farida Belisarova Cosmological model in modified Gauss-Bonnet gravity Physical Sciences and Technology |
| title | Cosmological model in modified Gauss-Bonnet gravity |
| title_full | Cosmological model in modified Gauss-Bonnet gravity |
| title_fullStr | Cosmological model in modified Gauss-Bonnet gravity |
| title_full_unstemmed | Cosmological model in modified Gauss-Bonnet gravity |
| title_short | Cosmological model in modified Gauss-Bonnet gravity |
| title_sort | cosmological model in modified gauss bonnet gravity |
| url | https://phst.kaznu.kz/index.php/journal/article/view/432 |
| work_keys_str_mv | AT indiranurat cosmologicalmodelinmodifiedgaussbonnetgravity AT shynaraymyrzakul cosmologicalmodelinmodifiedgaussbonnetgravity AT faridabelisarova cosmologicalmodelinmodifiedgaussbonnetgravity |