21厘米线天文学与约束新物理学
21 cm Line Astronomy and Constraining New Physics
摘要：
21厘米的信号似乎是一个宝库，可以让我们深入了解第一代发光物体在宇宙中形成的时期。氢是宇宙黎明（CD）期间重子物质的主要部分。因此，使用21 cm信号在CD期间研究物理是方便和有利的。任何外来能源的存在都可以将能量注入星系际介质（IGM）并加热气体。随后，它可以修改全局21 cm信号中的吸收幅度。该特征可以提供对注入IGM气体中的这种能量源的稳健约束。
英文摘要：
The 21 cm signal appears to be a treasure trove to provide an insight into the period when the first generation of luminous objects formed in the Universe. Hydrogen is the predominating fraction of the total baryonic matter during cosmic dawn (CD). Therefore, it is convenient and advantageous to study physics during CD using the 21 cm signal. The presence of any exotic source of energy can inject energy into the intergalactic medium (IGM) and heat the gas. Subsequently, it can modify the absorption amplitude in the global 21 cm signal. This feature can provide a robust bound on such sources of energy injection into the IGM gas.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
