Low-Energy Cosmic Rays and Associated MeV Gamma-Ray Emissions in the Protoplanetary System

被引：0
作者：
Sun, Xulei [1 ]
Zheng, Shuying [2 ]
Shi, Zhaodong [3 ]
Liu, Bing [3 ]
Yang, Ruizhi [3 ]
机构：
[1] Univ Sci & Technol China, Sch Gifted Young, Hefei 230026, Peoples R China
[2] Univ Sci & Technol China, Sch Phys, Dept Modern Phys, Hefei 230026, Peoples R China
[3] Univ Sci & Technol China, Sch Phys, Dept Astron, Hefei 230026, Peoples R China
来源：
UNIVERSE | 2024年 / 10卷 / 08期
关键词：
protoplanetary disk; low-energy cosmic rays; gamma rays; nuclear de-excitation lines; LINES; SPECTRUM; ICETOP;
D O I：
10.3390/universe10080310
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Low-energy cosmic rays (LECRs) play a crucial role in the formation of planetary systems, and detecting and reconstructing the properties of early LECRs is essential for understanding the mechanisms of planetary system formation. Given that LECRs interact with the surrounding medium to produce nuclear de-excitation line emissions, which are gamma-ray emissions with energy mainly within 0.1-10 MeV and are unaffected by stellar wind modulation, these emissions can accurately reflect the properties of LECRs. This study introduces an innovative method for using gamma-ray emissions to infer LECR properties. We employed the Parker transport equation to simulate the propagation and spectral evolution of LECRs in a protoplanetary disk and calculated the characteristic gamma-ray emissions resulting from interactions between LECRs and disk material. These gamma-ray emissions encapsulate the spectral information of LECRs, providing a powerful tool to reconstruct the cosmic ray environment at that time. This method, supported by further theoretical developments and observations, will fundamentally enhance our understanding of the impact of CRs on the origin and evolution of planetary systems and address significant scientific questions regarding the cosmic ray environment at the origin of life.
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页数：13
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