Research Project
Grant-in-Aid for Young Scientists (B)
Acceleration mechanism of cosmic rays is one of the biggest issues in modern astrophysics. Supernova remnants (SNRs) have revealed much attention as cosmic-ray accelerators. Our research team of Nagoya University revealed that the interstellar medium has a significant affect on the origin of cosmic rays and their high-energy radiation in the Galactic SNRs by focusing on the shock-cloud interaction. This research project aims to extend them to 25 SNRs in the Large Magellanic Clouds, in order to reveal the shock-cloud interaction. As a result, at least ten of them were shown to have molecular clouds that have good spatial correspondence with X-rays. Follow-up observations using ALMA revealed a strong connection between the cosmic-ray acceleration and shock-cloud interactions in the Magellanic SNRs for the first time.
宇宙線の起源は天文学100年来の謎であり研究意義が極めて大きい。なぜなら宇宙線は星の材料である星間雲の電離/加熱を促すため、その起源解明は「銀河や宇宙の進化」の理解に欠かせないからだ。本研究では、大マゼラン雲の超新星残骸 (SNR) に着目し、宇宙線の起源やその高エネルギー放射と周辺環境との関係を世界で初めて明らかにした。大マゼラン雲のSNRに着目した研究は前例がなく学術的意義は大きい。本研究によって得られた知見は、SNRに付随する星間雲が、銀河系以外でも宇宙線やX線・ガンマ線の発生に重要な役割を果たしていること示したものであり、人類の宇宙に対する理解を促進したという点で社会的意義も大きい。
All 2019 2018 2017 2016 Other
All Int'l Joint Research (5 results) Journal Article (20 results) (of which Int'l Joint Research: 18 results, Peer Reviewed: 18 results, Open Access: 19 results, Acknowledgement Compliant: 1 results) Presentation (38 results) (of which Int'l Joint Research: 22 results, Invited: 12 results) Book (1 results) Funded Workshop (2 results)
The Astrophysical Journal
Volume: 873 Issue: 1 Pages: 40-40
10.3847/1538-4357/ab02fd
Volume: 871 Issue: 1 Pages: 44-64
10.3847/1538-4357/aaf4fb
Publications of the Astronomical Society of Australia
Volume: 36 Pages: 1-29
10.1017/pasa.2019.7
Volume: 867 Issue: 1 Pages: 7-7
10.3847/1538-4357/aae07c
Monthly Notices of the Royal Astronomical Society
Volume: 479 Issue: 2 Pages: 1800-1806
10.1093/mnras/sty1196
Volume: 863 Issue: 1 Pages: 55-70
10.3847/1538-4357/aacfff
Volume: 864 Issue: 1 Pages: 12-12
10.3847/1538-4357/aad6a1
Volume: 480 Issue: 1 Pages: 134-148
10.1093/mnras/sty1797
Volume: 864 Issue: 2 Pages: 161-170
10.3847/1538-4357/aad7be
Volume: 866 Issue: 2 Pages: 76-84
10.3847/1538-4357/aae082
Astronomy & Astrophysics
Volume: 612 Pages: 8-30
10.1051/0004-6361/201730737
Volume: 842 Issue: 1 Pages: 22-30
10.3847/1538-4357/aa72ee
Publications of the Astronomical Society of Japan
Volume: 69 Issue: 3 Pages: 5-10
10.1093/pasj/psx032
Volume: 850 Issue: 1 Pages: 71-89
10.3847/1538-4357/aa9219
Volume: 474 Issue: 1 Pages: 662-676
10.1093/mnras/stx2727
Volume: 843 Issue: 1 Pages: 61-67
10.3847/1538-4357/aa73e0
Volume: 840 Issue: 2 Pages: 74-74
10.3847/1538-4357/aa6d67
Journal of High Energy Astrophysics
Volume: 15 Pages: 1-18
10.1016/j.jheap.2017.04.002
AIP Conference Proceedings
Volume: 1792 Pages: 1-6
10.1063/1.4968942
Proceedings of the IAU
Volume: 29B Issue: A29B Pages: 737-737
10.1017/s1743921316006608