Probing the Early Universe with Transient Objects
| Project/Area Number |
15K05018
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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 | The University of Tokyo |
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Principal Investigator |
Totani Tomonori 東京大学, 大学院理学系研究科(理学部), 教授 (90321588)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 高速電波バースト / ガンマ線バースト / 連星中性子星 / 宇宙再電離 / 突発天体 |
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| Outline of Final Research Achievements |
We theoretically examined the possibility that fast radio bursts (FRBs) are produced by binary neutron star mergers. Using a numerical merger simulation, we found that ejecta is expelled a few ms after the merger, and there is a time window for a FRB radio signal to escape to an observer. On the other hand, following the discovery of a repeating FRB 121102, we proposed a scenario that a long-lived surviving neutron star after the merger becomes such a repeater FRB. As observational studies, we performed follow-up observations using Subaru Telescope for some FRBs. We found a host galaxy candidate for FRB 150418, and set the deepest optical upper limit of possible optical afterglow to FRB 151230.
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Report
(4 results)
Research Products
(20 results)
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[Journal Article] The SUrvey for Pulsars and Extragalactic Radio Bursts - II. New FRB discoveries and their follow-up2017
Author(s)
Bh,ari S , Keane E F , Barr E D , Jameson A , Petroff E , Johnston S , Bailes M , Bhat N D R , Burgay M , Burke-Spolaor S , et al.
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Journal Title
Monthly Notices of the Royal Astronomical Society
Volume: 475
Issue: 2
Pages: 1427-1446
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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