Galaxy Formation in the Early Universe
Fuente:
arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866913597833084928 |
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| author | Moffat, J. W. |
| author_facet | Moffat, J. W. |
| contents | Recent observations by the James Webb Space Telescope (JWST) have revealed the presence of bright and well-formed galaxies at high redshifts, challenging the predictions of the standard Lambda-Cold Dark Matter (LCDM) cosmological model. This paper explores the potential of Modified Gravity (MOG), specifically Scalar-Tensor-Vector Gravity (STVG), to account for the rapid formation of these galaxies in the early universe. By enhancing the gravitational constant through a dimensionless parameter $α$ and incorporating a massive vector field $ϕ_μ$, MOG predicts deeper gravitational wells that can accelerate the collapse of baryonic matter. We present theoretical insights demonstrating how MOG can facilitate the increase in star formation rate and early formation of galaxies, offering a compelling alternative to LCDM. Our findings suggest that MOG provides a viable framework for understanding the rapid growth of galaxies observed by JWST. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_03534 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Galaxy Formation in the Early Universe Moffat, J. W. Astrophysics of Galaxies General Relativity and Quantum Cosmology Recent observations by the James Webb Space Telescope (JWST) have revealed the presence of bright and well-formed galaxies at high redshifts, challenging the predictions of the standard Lambda-Cold Dark Matter (LCDM) cosmological model. This paper explores the potential of Modified Gravity (MOG), specifically Scalar-Tensor-Vector Gravity (STVG), to account for the rapid formation of these galaxies in the early universe. By enhancing the gravitational constant through a dimensionless parameter $α$ and incorporating a massive vector field $ϕ_μ$, MOG predicts deeper gravitational wells that can accelerate the collapse of baryonic matter. We present theoretical insights demonstrating how MOG can facilitate the increase in star formation rate and early formation of galaxies, offering a compelling alternative to LCDM. Our findings suggest that MOG provides a viable framework for understanding the rapid growth of galaxies observed by JWST. |
| title | Galaxy Formation in the Early Universe |
| topic | Astrophysics of Galaxies General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2412.03534 |