Studies of X-ray Emissions in High Magnetic Fields based on Magnetar Observations
Project/Area Number |
24540309
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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Research Institution | Japan Aerospace Exploration Agency (2013-2014) Waseda University (2012) |
Principal Investigator |
NAKAGAWA Yujin 独立行政法人宇宙航空研究開発機構, 宇宙科学研究所, 宇宙航空プロジェクト研究員 (50513454)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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Keywords | マグネター / 超強磁場中性子星 / パルサー |
Outline of Final Research Achievements |
Magnetars, which are highly magnetized neutron stars with field strengths of ~10**14 G, show persistent X-ray emission as well as sporadic bursts. I have been proposing a model that the persistent emission consists of numerous micro bursts of various sizes. In our model, intensity variations of the persistent emission should be larger than the values expected from the Poisson distribution. I thus quantitatively calculated intensity RMS variations for 11 magnetars (21 observations) observed by the Suzaku satellite. As a result, the RMS variations are significantly greater than the values expected from the Poisson distribution.
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Report
(4 results)
Research Products
(19 results)
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[Journal Article] Wide-band spectra of magnetar burst and persistent emission2013
Author(s)
Nakagawa Y. E., Makishima K., Enoto T., Sakamoto T., Mihara T., Sugizaki M., Yamaoka K., Hurley K., Yoshida A., Gandhi P., Tashiro M., Morii M.
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Journal Title
Memorie della Societa Astronomica Italiana
Volume: v.84
Pages: 560-563
Related Report
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[Journal Article] All-sky observations by Suzaku wide-band all-sky monitor2013
Author(s)
Ohno M., Hanabata Y., Kawano T., Takaki K., Nakamura R., Tanaka Y., Fukazawa Y., Ueno H., Tashiro M., Terada Y., Iwakiri W., Yasuda T., Asahina M., Kobayashi S., Sakamoto A., Ishida Y., Sugimoto S., Akiyama M., Ohmori N., Yamauchi M., Nakagawa Y. E., Sugita S., Yamaoka K., Kokubun M., Takahashi T., Urata Y., et al.
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Journal Title
Memorie della Societa Astronomica Italiana
Volume: v.84
Pages: 735-736
Related Report
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