| Project/Area Number |
25400239
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Institute of Physical and Chemical Research |
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Principal Investigator |
Sugizaki Mutsumi 国立研究開発法人理化学研究所, MAXIチーム, 研究員 (00469933)
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| Co-Investigator(Renkei-kenkyūsha) |
TOMIDA Hiroshi 宇宙航空研究開発機構, 宇宙科学研究本部, 研究員 (30399547)
NAKAHIRA Satoshi 宇宙航空研究開発機構, 宇宙科学研究本部, 研究員 (00611493)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | X線連星系 / ガス比例計数管 / 宇宙実験 / X線天体観測 |
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| Outline of Final Research Achievements |
Using unbiased X-ray data taken by the MAXI (Monitor of All-sky X-ray Image) mission on the ISS since 2009 August, we performed systematic studies of X-ray binaries in terms of their outburst activities and the population in our Galaxy. Passing through the in-orbit operation over 7 years, two main X-ray instruments, Xe-gas proportional counters and CCD imagers, began to expose performance degradation according to the charged-particle irradiation. We revised the instrument response functions implementing all the in-orbit calibration information. In these 7 years, MAXI detected outbursts from 12 Be X-ray binary pulsars. We analyzed all their light curves, and investigated the correlations with the pulse period changes observed by the Fermi/GBM pulsar project. The results reveal that the observed relation largely agree with those of the Ghosh & Lamb 1979 model assuming the canonical neutron star parameters.
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