An Improved Fit for Linear Halo Bias at High Redshift
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866911596650954752 |
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| author | Wang, Kuan Muñoz, Julian B. Yung, L. Y. Aaron |
| author_facet | Wang, Kuan Muñoz, Julian B. Yung, L. Y. Aaron |
| contents | High- to ultrahigh-redshift clustering of halos provides a powerful tool to understand cosmology and galaxy formation. However, theoretical predictions are not firmly established in the first billion years, where current and upcoming surveys are beginning to reach percent-level precision. Here we measure dark matter halo biases at $z=6$ - 19 from simulation data, and find they are $\sim$ 3 - 4$\%$ higher than canonical results calibrated at low $z$. We provide an updated linear-bias fit at these early times, reducing the mean systematic offset to $< 1\%$. These results will enable robust interpretation of early-Universe galaxy clustering from JWST, Roman, and intensity-mapping surveys. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_14312 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | An Improved Fit for Linear Halo Bias at High Redshift Wang, Kuan Muñoz, Julian B. Yung, L. Y. Aaron Cosmology and Nongalactic Astrophysics High- to ultrahigh-redshift clustering of halos provides a powerful tool to understand cosmology and galaxy formation. However, theoretical predictions are not firmly established in the first billion years, where current and upcoming surveys are beginning to reach percent-level precision. Here we measure dark matter halo biases at $z=6$ - 19 from simulation data, and find they are $\sim$ 3 - 4$\%$ higher than canonical results calibrated at low $z$. We provide an updated linear-bias fit at these early times, reducing the mean systematic offset to $< 1\%$. These results will enable robust interpretation of early-Universe galaxy clustering from JWST, Roman, and intensity-mapping surveys. |
| title | An Improved Fit for Linear Halo Bias at High Redshift |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2604.14312 |