Galactic Diffuse Emission from Radio to Ultra-high-energy γ-Rays in Light of Up-to-date Cosmic-Ray Measurements

被引：1
作者：
He, Xin-Yu [1 ,2 ,3 ]
Zhang, Pei-Pei [1 ,2 ,3 ]
Yuan, Qiang [1 ,2 ]
Guo, Yi-Qing [3 ,4 ]
机构：
[1] Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210023, Peoples R China
[2] Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Peoples R China
[3] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing, Peoples R China
[4] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
ASTROPHYSICAL JOURNAL | 2024年 / 964卷 / 01期
基金：
中国国家自然科学基金;
关键词：
MILKY-WAY; DEPENDENT PROPAGATION; COMPTON-SCATTERING; MOLECULAR CLOUDS; CONTINUUM SURVEY; SKY; ANISOTROPY; RADIATION; PROTON; PLANE;
D O I：
10.3847/1538-4357/ad2a4e
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Cosmic rays (CRs) travel throughout the Galaxy, leaving traces from radio to ultra-high-energy gamma-rays due to interactions with the interstellar gas, radiation field, and magnetic field. Therefore, it is necessary to utilize multiwavelength investigations on the Galactic diffuse emission to shed light on the physics of CR production and propagation. In this work, we present a spatially dependent propagation scenario, taking account of a local source contribution, while making allowances for an additional CR component freshly accelerated near their sources. In this picture, after reproducing the particle measurements at the solar system, we calculated the intensity and compared the spectral energy distribution to observations from Fermi-LAT and LHAASO-KM2A in the gamma-ray band, and from WMAP and Planck among other radio surveys at lower energies. Multiband data considered in conjunction, the former comparison exhibits sufficiently good consistency in favor of our model, while the latter calls for improvement in data subtraction and processing. From this standpoint, there remains potential for advanced observations at energies from milli-eVs to MeVs toward the Galactic plane, in order to evaluate our model further and more comprehensively in the future.
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页数：10
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