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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/2510.18312 |
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| _version_ | 1866915566366752768 |
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| author | Carlson, Nathan J. Bond, J. Richard Chung, Dongwoo T. Horlaville, Patrick Morrison, Thomas |
| author_facet | Carlson, Nathan J. Bond, J. Richard Chung, Dongwoo T. Horlaville, Patrick Morrison, Thomas |
| contents | We present the $\mathtt{WebSky}$ $\mathrm{[CII]}$ line-intensity mock maps and forecast the capabilities of upcoming wide-field submillimeter-wave surveys of cosmological $\mathrm{[CII]}$ emission from the epoch of reionization (EoR). Using the $\mathtt{Peak~Patch}$ algorithm to generate light-cone dark matter (DM) halo catalogues and the $\mathtt{WebSky}$ framework to forward-model the cosmological $\mathrm{[CII]}$ signal, we construct tomographic mock surveys matched to the CCAT Observatory. We investigate both astrophysical models of $\mathrm{[CII]}$ emission from interstellar gas and the potential for the study of primordial intermittent non-Gaussianity (PING) as a science case for Stage 2 line intensity mapping (LIM) surveys. The $\mathrm{[CII]}$ voxel intensity distribution (VID) is used as a summary statistic in forecasts. Additional constraints on PING are derived from a relative entropy study of $\mathtt{Peak~Patch}$ halo mass functions. We show that upcoming LIM surveys will provide insights into the way we model cosmological line emission, and next-generation surveys can place competitive bounds on novel inflationary scenarios such as PING. The $\mathtt{WebSky}$ $\mathrm{[CII]}$ mocks and corresponding $\mathtt{Peak~Patch}$ halo catalogues are publicly available at https://uoft.me/webskycii . |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_18312 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The $\mathtt{WebSky}$ $\mathrm{[CII]}$ Forecasts and the search for primordial intermittent non-Gaussianity Carlson, Nathan J. Bond, J. Richard Chung, Dongwoo T. Horlaville, Patrick Morrison, Thomas Cosmology and Nongalactic Astrophysics We present the $\mathtt{WebSky}$ $\mathrm{[CII]}$ line-intensity mock maps and forecast the capabilities of upcoming wide-field submillimeter-wave surveys of cosmological $\mathrm{[CII]}$ emission from the epoch of reionization (EoR). Using the $\mathtt{Peak~Patch}$ algorithm to generate light-cone dark matter (DM) halo catalogues and the $\mathtt{WebSky}$ framework to forward-model the cosmological $\mathrm{[CII]}$ signal, we construct tomographic mock surveys matched to the CCAT Observatory. We investigate both astrophysical models of $\mathrm{[CII]}$ emission from interstellar gas and the potential for the study of primordial intermittent non-Gaussianity (PING) as a science case for Stage 2 line intensity mapping (LIM) surveys. The $\mathrm{[CII]}$ voxel intensity distribution (VID) is used as a summary statistic in forecasts. Additional constraints on PING are derived from a relative entropy study of $\mathtt{Peak~Patch}$ halo mass functions. We show that upcoming LIM surveys will provide insights into the way we model cosmological line emission, and next-generation surveys can place competitive bounds on novel inflationary scenarios such as PING. The $\mathtt{WebSky}$ $\mathrm{[CII]}$ mocks and corresponding $\mathtt{Peak~Patch}$ halo catalogues are publicly available at https://uoft.me/webskycii . |
| title | The $\mathtt{WebSky}$ $\mathrm{[CII]}$ Forecasts and the search for primordial intermittent non-Gaussianity |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2510.18312 |