Exploring the cosmic dawn and epoch of reionization with the 21 cm line

被引：6
作者：
Shimabukuro, Hayato [1 ]
Hasegawa, Kenji [2 ]
Kuchinomachi, Akira [3 ]
Yajima, Hidenobu [4 ]
Yoshiura, Shintaro [5 ,6 ]
机构：
[1] Yunnan Univ, SWIFAR, 2 North Green Lake Rd, Kunming 650500, Yunnan, Peoples R China
[2] Nagoya Univ, Dept Phys & Astrophys, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648602, Japan
[3] Kumamoto Univ, Fac Adv Sci & Technol, Kumamoto, Kumamoto 8608555, Japan
[4] Univ Tsukuba, Ctr Computat Sci, 1-1-1 Ten-Nodai, Tsukuba, Ibaraki 3058577, Japan
[5] Natl Astron Observ Japan, Mizusawa VLBI Observ, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
[6] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia
来源：
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2023年 / 75卷
基金：
中国国家自然科学基金;
关键词：
cosmology: theory; dark ages reionization first stars; diffuse radiation; CROSS-POWER SPECTRUM; LY-ALPHA EMITTERS; RADIATION-HYDRODYNAMICS SIMULATION; SPIN-TEMPERATURE-FLUCTUATIONS; REDSHIFTED 21-CM BISPECTRUM; LARGE-SCALE SIMULATIONS; X-RAY; GALAXY FORMATION; INTERGALACTIC MEDIUM; NEUTRAL HYDROGEN;
D O I：
10.1093/pasj/psac042
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The dark age of the Universe, when no luminous object existed, ended with the birth of the first stars, galaxies, and black holes. This epoch is called cosmic dawn. Cosmic reionization is the major transition of the intergalactic medium in the Universe driven by ionizing photons emitted from luminous objects. Although the epoch through the dark ages to reionization is a milestone in the Universe, our knowledge of it is not yet sufficient. The cosmic 21 cm signal, which is emitted from neutral hydrogen, is expected to open a new window into this epoch. In this review paper, we first introduce the basic physics of the 21 cm line and how the first stars impact on the 21 cm line signal. Next, we briefly summarize how we extract astrophysical information from the 21 cm line signal by means of statistical and machine-learning approaches. We also discuss the synergy between the 21 cm line signal and other emission lines. Finally, we summarize the current status of 21 cm experiments.
引用
收藏
页码：S1 / S32
页数：32
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