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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/2504.19422 |
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| _version_ | 1866915262457970688 |
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| author | Ma, Qing-Bo Chen, Xiao-Rong Li, Ming Guo, Qi Ciardi, Benedetta Acharya, Anshuman Wang, Xin |
| author_facet | Ma, Qing-Bo Chen, Xiao-Rong Li, Ming Guo, Qi Ciardi, Benedetta Acharya, Anshuman Wang, Xin |
| contents | We use high resolution N-body dark matter simulations and L-Galaxies semi-analytical galaxy formation models to explore the high-$z$ galaxy properties and estimate the budget of ionizing photons. The parameters within L-Galaxies are obtained using a Markov Chain Monte Carlo (MCMC) method with high-$z$ galaxy observations from JWST and other telescopes. We consider two versions of L-Galaxies with and without dust correction on galaxy UV luminosities. With the best-fit parameters, both L-Galaxies 2015 and L-Galaxies 2020 reproduce well observations of UV luminosity functions, stellar mass functions, star formation rate densities and ionizing photon emission efficiency. With the assumption of escape fraction of $20\%$, all models produce more ionizing photons than the number of Hydrogen atoms in the Universe at $z>6$. The inclusion of dust correction within MCMC results in higher star formation efficiency, which predicts $\sim 50\%$ more ionizing photons, with better consistency between the predicted stellar mass functions and observations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_19422 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Constraints on the galaxy formation models during epoch of reionization with high redshift observations Ma, Qing-Bo Chen, Xiao-Rong Li, Ming Guo, Qi Ciardi, Benedetta Acharya, Anshuman Wang, Xin Cosmology and Nongalactic Astrophysics We use high resolution N-body dark matter simulations and L-Galaxies semi-analytical galaxy formation models to explore the high-$z$ galaxy properties and estimate the budget of ionizing photons. The parameters within L-Galaxies are obtained using a Markov Chain Monte Carlo (MCMC) method with high-$z$ galaxy observations from JWST and other telescopes. We consider two versions of L-Galaxies with and without dust correction on galaxy UV luminosities. With the best-fit parameters, both L-Galaxies 2015 and L-Galaxies 2020 reproduce well observations of UV luminosity functions, stellar mass functions, star formation rate densities and ionizing photon emission efficiency. With the assumption of escape fraction of $20\%$, all models produce more ionizing photons than the number of Hydrogen atoms in the Universe at $z>6$. The inclusion of dust correction within MCMC results in higher star formation efficiency, which predicts $\sim 50\%$ more ionizing photons, with better consistency between the predicted stellar mass functions and observations. |
| title | Constraints on the galaxy formation models during epoch of reionization with high redshift observations |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2504.19422 |