Compact star in noninteger power model of $f(R)$ gravity
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866909375315050496 |
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| author | Cui, Yong-Xiang Yan, Zu Numajiri, Kota Katsuragawa, Taishi Nojiri, Shin'ichi |
| author_facet | Cui, Yong-Xiang Yan, Zu Numajiri, Kota Katsuragawa, Taishi Nojiri, Shin'ichi |
| contents | We investigate compact stars in the noninteger power (NIP) model of $f(R)$ gravity theory, which includes the higher-curvature correction to the Einstein-Hilbert action. The mass-radius relation of the compact stars in the NIP model predicts large deviations from those in the general relativity in the low-mass region, potentially allowing us to test the NIP model by future astrophysical observations. We also study the nonvanishing scalar hair surrounding the compact star and demonstrate that the chameleon mechanism works efficiently. They result in distinct scalar profiles inside and outside the star, which implies screening the fifth force mediated by the scalar field. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_12301 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Compact star in noninteger power model of $f(R)$ gravity Cui, Yong-Xiang Yan, Zu Numajiri, Kota Katsuragawa, Taishi Nojiri, Shin'ichi General Relativity and Quantum Cosmology High Energy Physics - Theory We investigate compact stars in the noninteger power (NIP) model of $f(R)$ gravity theory, which includes the higher-curvature correction to the Einstein-Hilbert action. The mass-radius relation of the compact stars in the NIP model predicts large deviations from those in the general relativity in the low-mass region, potentially allowing us to test the NIP model by future astrophysical observations. We also study the nonvanishing scalar hair surrounding the compact star and demonstrate that the chameleon mechanism works efficiently. They result in distinct scalar profiles inside and outside the star, which implies screening the fifth force mediated by the scalar field. |
| title | Compact star in noninteger power model of $f(R)$ gravity |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2408.12301 |