Line Intensity Mapping Prediction from the Cosmic Dawn (CoDa). III. Simulation for H<i>α</i> from Galaxies and the Intergalactic Medium During the Epoch of Reionization
Abstract The evolution of large-scale structure, galaxies and the intergalactic medium (IGM) during the Epoch of Reionization can be probed by upcoming Line Intensity Mapping (LIM) experiments, which sample in redshift and direction without needing to resolve individual galaxies. We predict the intensity and sources of hydrogen H α emission, dominated by radiative recombination following ionization by UV from the same massive stars that caused reionization, down to redshift 4.6, using the largest fully coupled, radiation-hydro simulation of galaxy formation and reionization to date, Cosmic Dawn (CoDa) III. We compute the mean intensity and VID versus redshift, including the relative contributions of galaxies and IGM. This will provide mock data to guide and interpret LIM experiments such as NASA’s SPHEREx and proposed CoDa Intensity Mapper.
Authors
- Ilian T. Iliev (ORCID: https://orcid.org/0000-0002-5174-1365)
- Dominique Aubert (ORCID: https://orcid.org/0000-0002-4966-8779)
- Gustavo Yepes (ORCID: https://orcid.org/0000-0001-5031-7936)
- Kyungjin Ahn (ORCID: https://orcid.org/0000-0003-3974-1239)
- Paul R. Shapiro (ORCID: https://orcid.org/0000-0002-0410-3045)
- Stefan Gottlöber (ORCID: https://orcid.org/0000-0003-4667-3174)
- Eugene Hyeonmin Lee (ORCID: https://orcid.org/0009-0001-8366-7606)
- Luke Conaboy (ORCID: https://orcid.org/0000-0002-6580-7177)
- Jenny G. Sorce
- Pierre Ocvirk (ORCID: https://orcid.org/0000-0002-8488-504X)
- Joohyun Lee (ORCID: https://orcid.org/0000-0001-8593-8222)
- Joseph S. W. Lewis (ORCID: https://orcid.org/0000-0001-7917-8474)
- Hyunbae Park (ORCID: https://orcid.org/0000-0002-7464-7857)
- Romain Teyssier (ORCID: https://orcid.org/0000-0001-7689-0933)
- Yohan Dubois (ORCID: https://orcid.org/0000-0003-0225-6387)
- Taha Dawoodbhoy (ORCID: https://orcid.org/0000-0002-4760-7016)
Institutions
- Centre National de la Recherche Scientifique (FR)
- University of Nottingham (GB)
- University of Tsukuba (JP)
- California Polytechnic State University (US)
- Chosun University (KR)
- University of Sussex (GB)
- Princeton University (US)
- Université de Lille (FR)
- Leibniz Institute for Astrophysics Potsdam (DE)
- Institut d'Astrophysique de Paris (FR)
- Observatoire astronomique de Strasbourg (FR)
- Sorbonne Université (FR)
- Universidad Autónoma de Madrid (ES)
- Université de Strasbourg (FR)
- École Centrale de Lille (FR)
- The University of Texas at Austin (US)
Publication Details
- Journal
- Research Notes of the AAS
- Published
- 2025-04-23
- DOI
- https://doi.org/10.3847/2515-5172/adcea7
- Citations
- 1
- Primary Topic
- Galaxies: Formation, Evolution, Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 1.15
Funders
- National Science Foundation
- U.S. Department of Energy
- National Aeronautics and Space Administration
- Nuclear Safety and Security Commission