Line Intensity Mapping Prediction from the Cosmic Dawn (CoDa) III Simulation for H$\alpha$ from Galaxies and the Intergalactic Medium during the Epoch of Reionization
Line Intensity Mapping Prediction from the Cosmic Dawn (CoDa) III Simulation for H$\alpha$ from Galaxies and the Intergalactic Medium during the Epoch of Reionization
The evolution of large-scale structure, galaxies and the intergalactic medium (IGM) during the Epoch of Reionization (EoR) 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$\alpha$ 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 Voxel Intensity Distribution (VID) vs. 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 Cosmic Dawn Intensity Mapper (CDIM).
Eugene Hyeonmin Lee、Joohyun Lee、Paul R. Shapiro、Pierre Ocvirk、Joseph S. W. Lewis、Taha Dawoodbhoy、Ilian T. Iliev、Luke Conaboy、Kyungjin Ahn、Hyunbae Park、Jenny G. Sorce、Dominique Aubert、Romain Teyssier、Gustavo Yepes、Yohan Dubois、Stefan Gottl?ber
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Eugene Hyeonmin Lee,Joohyun Lee,Paul R. Shapiro,Pierre Ocvirk,Joseph S. W. Lewis,Taha Dawoodbhoy,Ilian T. Iliev,Luke Conaboy,Kyungjin Ahn,Hyunbae Park,Jenny G. Sorce,Dominique Aubert,Romain Teyssier,Gustavo Yepes,Yohan Dubois,Stefan Gottl?ber.Line Intensity Mapping Prediction from the Cosmic Dawn (CoDa) III Simulation for H$\alpha$ from Galaxies and the Intergalactic Medium during the Epoch of Reionization[EB/OL].(2025-04-19)[2025-05-28].https://arxiv.org/abs/2504.15821.点此复制
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