| Budget Amount *help |
¥15,600,000 (Direct Cost: ¥12,000,000、Indirect Cost: ¥3,600,000)
Fiscal Year 2022: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
In this study, we investigated when cosmic rays were accelerated after the big bang of the universe and when cosmic rays began to make important contributions to various astronomical phenomena. We showed that the first cosmic rays were accelerated by collisionless shock waves generated by the explosion of the first stars hundreds of millions of years after the birth of the Universe. We then showed that the first cosmic rays generate magnetic fields and heat gas as they propagate through intergalactic space. In addition, we showed that the seed magnetic field created by the first cosmic rays could be the origin of the magnetic fields that exist in the present-day Universe, and that the heating of gas in the early Universe by cosmic rays could be verified by future 21 cm observations.
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