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2015 Fiscal Year Final Research Report

Radio wave propagation and diffraction in relativistic pulsar winds

Research Project

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Project/Area Number 24540258
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionThe University of Tokyo

Principal Investigator

Terasawa Toshio  東京大学, 宇宙線研究所, 教授 (30134662)

Co-Investigator(Kenkyū-buntansha) ASANO Katsuaki  東京大学, 宇宙線研究所, 助教 (80399279)
Co-Investigator(Renkei-kenkyūsha) SEKIDO Mamoru  独立行政法人情報通信研究機構, 電磁波計測研究所, 主任研究員 (60359057)
TAKEFUJI Kazuhiro  独立行政法人情報通信研究機構, 電磁波計測研究所, 研究員 (70534121)
TAKEUCHI Hiroshi  独立行政法人宇宙航空研究開発機構, 助教 (90329029)
KAMEYA Osamu  国立天文台, 水沢VLBI観測所, 助教 (70202025)
MISAWA Hiroaki  東北大学, 理学研究科, 准教授 (90219618)
SHIBATA Shimpei  山形大学, 理学研究科, 教授 (90187401)
Research Collaborator TANAKA Yasuyuki  
MIKAMI Ryo  
KISAKA Shota  
TANAKA Shuta  
Project Period (FY) 2012-04-01 – 2016-03-31
Keywords中性子星 / かにパルサー / 巨大電波パルス / 相対論的粒子加速
Outline of Final Research Achievements

One of the most famous neutron stars, the Crab pulsar, emits enigmatic giant radio pulses (GRP) which are more than several thousands stronger than normal radio pulses.
In this reseach project, we study the GRP phenomenon both observationally and theoretically. Observationally, we have obtained the world's first example of wide-frequency GRPs extending from 325MHz to 8GHz. Further, from the statistical study of many GRP observed below 2.3GHz, we discovered that about the half of GRP follows single power law frequency spectrum. Theoretically, we have quantitatively shown that transfer of wave energy toward the lower frequency region occurs via induced-Compoton scattering process along with the propagation of high-intensity radio waves, such as GRP.

Free Research Field

宇宙線物理学

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Published: 2017-05-10  

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