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合作团队介绍说,2021年11月,中国天问一号环绕器进入火星科学任务轨道,其搭载的能量粒子分析仪(MEPA)开始探测火星空间的粒子通量。2022年2月15日,能量粒子分析仪观测到一个流量和能量极高的太阳高能粒子事件。该事件同时被欧洲空间局的微量气体轨道飞行器(TGO)、美国航空航天局的火星大气和挥发性演化轨道器(MAVEN)以及火星表面的好奇号火星车探测到,成为火星空间首次有如此多的探测器同时探测到同一个太阳高能粒子事件。
在本项研究中,合作团队使用多个探测器数据来构建太阳高能粒子事件的相关质子能谱。其中,中低能段的质子能谱由天问一号能量粒子分析仪和火星大气和挥发性演化轨道器上的能量粒子仪提供;更高能段的质子通量是团队结合火星表面的辐射评估探测器和火星粒子传输模型仿真反演得到。他们通过对上述观测和反演的能谱进行拟合,得到此次太阳高能粒子事件在火星空间1—1000兆电子伏能量范围内的完整质子能谱。
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China and Brazil have broad prospects for cooperation in various fields, such as economic and trade exchanges, scientific and technological innovation, and people-to-people exchanges, said Cui Shoujun, professor and director of the Institute of International Development Studies at the School of International Studies at Renmin University of China, during an interview with China News Network.
The year 2024 marks the 50th anniversary of the establishment of diplomatic ties between China and Brazil. He believes that the two countries with strategic and innovative visions are expected to promote the steady development of bilateral relations, and jointly work together for the next "golden 50 years".(Gan Tian)
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