Line Intensity Mapping Prediction from the Cosmic Dawn (CoDa). III. Simulation for Hα from Galaxies and the Intergalactic Medium During the Epoch of Reionization
Year: 2025
Type: article
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 Hα 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.
Source: Research Notes of the AAS
Institutions: The University of Texas at Austin, Observatoire astronomique de Strasbourg, Université de Strasbourg, Centre National de la Recherche Scientifique, Institut d'Astrophysique de Paris, Université Pierre-et-Marie-Curie, California Polytechnic State University, University of Sussex, University of Nottingham, Chosun University, University of Tsukuba, Université de Lille, Centre de Recherche en Informatique, Signal et Automatique de Lille, Centrale Lille Institut, Princeton University, Universidad Autónoma de Madrid, Leibniz Institute for Astrophysics Potsdam
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Award: G3353255799
OpenAlex ID: W4409723128