Deep Universe explored by neutrinos

• Project Area: Unification and Development of the Neutrino Science Frontier
• Project/Area Number: 25105005
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Chiba University
• Principal Investigator: Yoshida Shigeru 千葉大学, 大学院理学研究院, 教授 (00272518)
• Co-Investigator(Kenkyū-buntansha): 石原 安野 千葉大学, 大学院理学研究院, 准教授 (40568929) ; 奥村 公宏 東京大学, 宇宙線研究所, 准教授 (70361657) ; 間瀬 圭一 千葉大学, 大学院理学研究院, 助教 (80400810)
• Project Period (FY): 2013-06-28 – 2018-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥181,740,000 (Direct Cost: ¥139,800,000、Indirect Cost: ¥41,940,000); Fiscal Year 2017: ¥30,290,000 (Direct Cost: ¥23,300,000、Indirect Cost: ¥6,990,000); Fiscal Year 2016: ¥38,740,000 (Direct Cost: ¥29,800,000、Indirect Cost: ¥8,940,000); Fiscal Year 2015: ¥33,020,000 (Direct Cost: ¥25,400,000、Indirect Cost: ¥7,620,000); Fiscal Year 2014: ¥39,910,000 (Direct Cost: ¥30,700,000、Indirect Cost: ¥9,210,000); Fiscal Year 2013: ¥39,780,000 (Direct Cost: ¥30,600,000、Indirect Cost: ¥9,180,000)
• Keywords: 宇宙線 / ニュートリノ / 南極 / 素粒子 / 素粒子実験

Outline of Final Research Achievements

High energy neutrino astronomy is now blooming as a new astronomical research frontier based on the rich amount of observational data. We conducted analyses of the data taken by the IceCube Neutrino Observatory at South Pole and revealed that there is a bulk of cosmic neutrinos at energies raging from TeV to PeV. Their major origins have been still unknown, but the present analyses has brought a convincing path toward identifying neutrino emitters by accumulating more data in near future. We have also acquired key technologies to enhance our neutrino detection capability by developing the new high-function detector called D-Egg. D-Egg has been selected as one of the major optical sensors in the up-coming upgrade of IceCube.

Academic Significance and Societal Importance of the Research Achievements

人類は宇宙を観測する手段として、ガリレオの時代から一貫して光、すなわち電磁波信号の検出に依存してきた。しかし2010年代に、重力波、そしてニュートリノという全く新たな信号を宇宙観測の手段として利用できるまでに至った。本研究成果は、それ自体未知の部分が多い素粒子ニュートリノを、活動的宇宙を観測する手段として定着させ、ニュートリノ天文学の急速な発展を実現した。

Research Products

• [Int'l Joint Research] University of Wisconsin - Madison/University of Maryland/LBNL(米国)
• [Int'l Joint Research] RWTH AACHEN UNIVERSITY/DESY/University of Wuppertal(ドイツ)
• [Int'l Joint Research] University of Uppsala/Stockholm University(スウェーデン)
• [Int'l Joint Research] University of Wisconsin, Madison/University of Maryland/University of Alabama(米国)
• [Int'l Joint Research] RWTH AACHEN UNIVERSITY/DESY/University of Mainz(ドイツ)
• [Int'l Joint Research] ULB/VUB/University of Gent(ベルギー)
• [Int'l Joint Research] Stochholm University/Uppsala University(スウェーデン)
• [Int'l Joint Research] Sungkyunkwan Unicersity(韓国)
• [Int'l Joint Research]
• [Int'l Joint Research] ウイスコンシン大学/メリーランド大学/ローレンス バークレー国立研究所(米国)
• [Int'l Joint Research] DESY/RWTH Aachen/University of Wuppertal(ドイツ)
• [Int'l Joint Research] ウイスコンシン大学(米国)
• [Int'l Joint Research] DESY(ドイツ)
• [Int'l Joint Research] ストックホルム大学/ウプサラ大学(スウェーデン)
• [Int'l Joint Research] ブリュッセル自由大学(ベルギー)
• [Int'l Joint Research] ジェネーブ大学(スイス)
• [Int'l Joint Research]
• [Journal Article] Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A (2018)
  • Author(s): The IceCube Collaboration、Fermi-LAT、MAGIC、AGILE、ASAS-SN、HAWC、H.E.S.S.、INTEGRAL、Kanata、Kiso、Kapteyn、Liverpool Telescope、Subaru、Swift/NuSTAR、VERITAS、VLA/17B-403 teams
  • Journal Title: Science Volume: 361 Issue: 6398 Pages: 1378-1378
  • DOI: 10.1126/science.aat1378
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert (2018)
  • Author(s): S. Yoshida, A. Ishihara 他（ IceCube collaboration）
  • Journal Title: Science Volume: 361 Issue: 6398 Pages: 147-151
  • DOI: 10.1126/science.aat2890
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] OBSERVATION AND CHARACTERIZATION OF A COSMIC MUON NEUTRINO FLUX FROM THE NORTHERN HEMISPHERE USING SIX YEARS OF ICECUBE DATA (2016)
  • Author(s): M.G. Aartsen et al (IceCube Collaboration)
  • Journal Title: The Astrophysical Journal Volume: 833 Issue: 1 Pages: 3-3
  • DOI: 10.3847/0004-637x/833/1/3
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Systematics for Atmospheric Neutrinos in IceCube (2016)
  • Author(s): IceCube Collaboration (Takao Kuwabara et al )
  • Journal Title: JPS Conference Proceedings Volume: 12 Pages: 010014-010014
  • DOI: 10.7566/jpscp.12.010014
  • Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Evidence for Astrophysical Muon Neutrinos from the Northern Sky with IceCube (2015)
  • Author(s): M.G. Aartsen, A.Ishihara, L.Mase, S.Yoshida et al. (IceCube Collaboration)
  • Journal Title: Physical Review Letters Volume: 115 Issue: 8 Pages: 081102-081102
  • DOI: 10.1103/physrevlett.115.081102
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data IceCube Collaboration (2014)
  • Author(s): A. Ishihara, K. Mase, S. Yoshida, et al
  • Journal Title: Phys. Rev. Lett Volume: 113 Issue: 10 Pages: 101101-101101
  • DOI: 10.1103/physrevlett.113.101101
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector (2013)
  • Author(s): IceCube Collaboration: A. Ishihara, S. Yoshida, et al.
  • Journal Title: Science Volume: 342 Issue: 6161 Pages: 1242856-1242856
  • DOI: 10.1126/science.1242856
  • Peer Reviewed / Open Access
• [Journal Article] First observation of PeV-energy neutrinos with IceCube (2013)
  • Author(s): M. G. Aartsen, A.Ishihara, K.Mase, S.Yoshida et al (IceCube Collaboration)
  • Journal Title: Physical Review Letters Volume: 111 Issue: 2 Pages: 021103-021103
  • DOI: 10.1103/physrevlett.111.021103
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Neutrino and multimessenger astrophysics with IceCube (2019)
  • Author(s): Aya Ishihara
  • Organizer: Revealing the history of the universe with underground particle and nuclear research, Sendai, Japan
  • Int'l Joint Research / Invited
• [Presentation] IceCube実験による高エネルギーニュートリノ天文学 (2019)
  • Author(s): 吉田滋
  • Organizer: 新学術「地下素研究」第5回超新星ニュートリノ研究会 (国立天文台・三鷹）
  • Invited
• [Presentation] Development of the front-end electronics for the new optical module “D-Egg or IceCube-Gen2 (2018)
  • Author(s): Ryo Nagai
  • Organizer: 5th International Workshop on New Photon-Detectors, Tokyo, Japan
  • Int'l Joint Research
• [Presentation] Atmospheric muon and electron neutrino energy spectrum measured by first year of IceCube-86 detector (2016)
  • Author(s): Takao Kuwabara
  • Organizer: Neutrino 2016, UK
  • Int'l Joint Research
• [Presentation] High Energy Neutrino Astronomy: An experimental view (2016)
  • Author(s): Aya Ishihara
  • Organizer: International workshop on Astroparticle physics at Yachay, Ecuado
  • Int'l Joint Research / Invited
• [Presentation] 次世代南極ニュートリノ望遠鏡IceCube-Gen2に向けた新型光検出器D-EGGの性能評価及び開発状況 (2016)
  • Author(s): 石原安野
  • Organizer: 日本物理学会、宮崎
• [Presentation] 次世代南極ニュートリノ望遠鏡計画 (2016)
  • Author(s): 石原安野
  • Organizer: Neutrino Frontier Workshop、加賀
• [Presentation] Dawn of high energy neutrino astrophysics, (2015)
  • Author(s): K.Mase
  • Organizer: Everything about Gravity
  • Place of Presentation: NTU, Taiwan
  • Year and Date: 2015-12-14
  • Int'l Joint Research / Invited
• [Presentation] Rapporteur Talk, (2015)
  • Author(s): A.Ishihara
  • Organizer: ICRC
  • Place of Presentation: Hague, Netherlands
  • Year and Date: 2015-07-30
  • Int'l Joint Research / Invited
• [Presentation] Dual DOM housing up and down PMT pair (2014)
  • Author(s): Shigeru Yoshida
  • Organizer: HAP workshop
  • Place of Presentation: Aachen (Germany)
  • Year and Date: 2014-12-08
  • Int'l Joint Research / Invited
• [Presentation] The latest IceCube result (2013)
  • Author(s): K. Mase
  • Organizer: RICH 2013
  • Place of Presentation: 湘南
  • Year and Date: 2013-12-02 – 2013-12-06
  • Invited
• [Presentation] IceCube実験が語るニュートリノと高エネルギー宇宙線起源のリンク (2013)
  • Author(s): 吉田滋
  • Organizer: 特別推進研究研究会「高エネルギーガンマ線でみる極限宇宙2013」
  • Place of Presentation: 東大宇宙線研究所
  • Year and Date: 2013-09-03 – 2013-09-04
  • Invited
• [Presentation] 宇宙起源ニュートリノの発見 (2013)
  • Author(s): 石原安野
  • Organizer: 新学術領域研究「ニュートリノフロンティア」研究会
  • Place of Presentation: 東京工業大学
  • Year and Date: 2013-08-31
  • Invited
• [Presentation] What can we learn about the ultra-high energy cosmic-ray origin from the present results by the IceCube Neutrino Observatory? (2013)
  • Author(s): S. Yoshida
  • Organizer: TeVPA 2013
  • Place of Presentation: カリフォルニア大学, USA
  • Year and Date: 2013-08-26 – 2013-08-29
  • Invited
• [Remarks] ハドロン宇宙国際研究センター
  • URL: http://www.icehap.chiba-u.jp/