Cosmology with voids from the Nancy Grace Roman Space Telescope
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909897043476480 |
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| author | Verza, Giovanni Degni, Giulia Pisani, Alice Hamaus, Nico Massara, Elena Benson, Andrew Escoffier, Stéphanie Wang, Yun Zhai, Zhongxu Doré, Olivier |
| author_facet | Verza, Giovanni Degni, Giulia Pisani, Alice Hamaus, Nico Massara, Elena Benson, Andrew Escoffier, Stéphanie Wang, Yun Zhai, Zhongxu Doré, Olivier |
| contents | We provide an accurate forecast of the expected constraining power from the main void statistics -- the void size function and the void-galaxy cross-correlation function -- to be measured by the Roman reference High Latitude Spectroscopic Survey from the Nancy Grace Roman Space Telescope. Relying on a realistic galaxy mock lightcone, covering 2000 square degrees, we find more than $8\times 10^4 $ voids and explore their constraining power in the framework of three different cosmological models: $Λ$CDM, $w$CDM, and $w_0 w_{\rm a}$CDM. This work confirms the strong complementarity of different void statistics and showcases the constraining power to be expected from Roman voids thanks to the combination of its high tracer density and large observed volume. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_19713 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Cosmology with voids from the Nancy Grace Roman Space Telescope Verza, Giovanni Degni, Giulia Pisani, Alice Hamaus, Nico Massara, Elena Benson, Andrew Escoffier, Stéphanie Wang, Yun Zhai, Zhongxu Doré, Olivier Cosmology and Nongalactic Astrophysics We provide an accurate forecast of the expected constraining power from the main void statistics -- the void size function and the void-galaxy cross-correlation function -- to be measured by the Roman reference High Latitude Spectroscopic Survey from the Nancy Grace Roman Space Telescope. Relying on a realistic galaxy mock lightcone, covering 2000 square degrees, we find more than $8\times 10^4 $ voids and explore their constraining power in the framework of three different cosmological models: $Λ$CDM, $w$CDM, and $w_0 w_{\rm a}$CDM. This work confirms the strong complementarity of different void statistics and showcases the constraining power to be expected from Roman voids thanks to the combination of its high tracer density and large observed volume. |
| title | Cosmology with voids from the Nancy Grace Roman Space Telescope |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2410.19713 |