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Verification of the black-hole dark-matter scenario in the light of high-energy cosmic-ray observations and high-energy accelerator experiments

Research Project

Project/Area Number 16K17675
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionHirosaki University

Principal Investigator

Sendouda Yuuiti  弘前大学, 理工学研究科, 准教授 (80606111)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywordsブラックホール / 暗黒物質 / 宇宙線 / 宇宙物理 / 理論天文学
Outline of Final Research Achievements

In order to verify a hypothesis that light, primordial black holes (PBHs) constitute some portion of the dark matter in the universe, we have numerically studied the spectra of emitted particles from PBHs due to the Hawking effect and the subsequent propagation to the earth. The numerical calculations have been carried out using up-to-date parameters and a public code PYTHIA 8 that take into account the newest experimental data from the recent hadron collider experiments such as LHC. Comparing the calculated cosmic-ray spectra of high-energy photons and antiprotons with the recent observational results from Fermi LAT, AMS-02 and so on, we put a strict upper bound on the abundance of PBHs with mass around five times ten to the fourteenth grams.

Academic Significance and Societal Importance of the Research Achievements

宇宙には質量を持つという性質しか明らかになっていない暗黒物質が存在していると言われ、その正体の解明は宇宙物理学の最大の目標の一つである。本研究では、宇宙初期から存在する原始ブラックホールがその正体であるとする仮説の部分的な検証を試みた。原始ブラックホールのうち比較的軽いものはHawking効果と呼ばれる現象によって様々な粒子を放射すると考えられ、それらが宇宙空間を伝播して地球に到達し、宇宙線として観測される可能性がある。最近の観測データとの比較から、着目した質量範囲にある軽い原始ブラックホールの量だけでは暗黒物質の全体を担うには十分ではなく、他の候補に目を向けていく必要があることが分かった。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (20 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (4 results) Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 2 results,  Acknowledgement Compliant: 3 results) Presentation (12 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results)

  • [Int'l Joint Research] Queen Mary University London(英国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] CNRS/Universite Paris Diderot(フランス)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Queen Mary University of London(英国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Queen Mary University of London(英国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] A quantisation procedure in the presence of an initial Kasner singularity: primordial gravitational waves from triaxially anisotropic pre-inflation2019

    • Author(s)
      Yu Furuya, Yuki Niiyama, Yuuiti Sendouda
    • Journal Title

      Classical and Quantum Gravity

      Volume: 36 Issue: 8 Pages: 085007-085007

    • DOI

      10.1088/1361-6382/ab0ca9

    • NAID

      130008153379

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Probing pre-inflationary anisotropy with directional variations in the gravitational wave background2017

    • Author(s)
      Yu Furuya, Yuki Niiyama, Yuuiti Sendouda
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2017(01) Issue: 01 Pages: 009-009

    • DOI

      10.1088/1475-7516/2017/01/009

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Rapid merger of binary primordial black holes: An implication for GW1509142016

    • Author(s)
      K. Hayasaki, K. Takahashi, Y. Sendouda, S. Nagataki
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 68 Issue: 4 Pages: 66-66

    • DOI

      10.1093/pasj/psw065

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Constraints on primordial black holes from the Galactic gamma-ray background2016

    • Author(s)
      B.J. Carr, Kazunori Kohri, Yuuiti Sendouda, Jun'ichi Yokoyama
    • Journal Title

      Phys.Rev. D

      Volume: 94 Issue: 4 Pages: 044029-044029

    • DOI

      10.1103/physrevd.94.044029

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Primordial Gravitational Waves Originating from an Anisotropic Pre-inflationary Stage2018

    • Author(s)
      Yu Furuya, Yuki Niiyama, Yuuiti Sendouda
    • Organizer
      Fifteenth Marcel Grossmann Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Einstein-Weyl重力におけるテンソル摂動のエネルギー密度とその原始重力波への応用2018

    • Author(s)
      新山優樹, Nathalie Deruelle, 古谷有, 仙洞田雄一
    • Organizer
      日本物理学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Energy density of tensor perturbations in Einstein-Weyl gravity and its application to primordial gravitational waves2018

    • Author(s)
      Yuki Niiyama, Nathalie Deruelle, Yu Furuya, Yuuiti Sendouda
    • Organizer
      The 28th Workshop on General Relativity and Gravitation in Japan
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bianchi I型非等方プレインフレーションからの原始背景重力波2018

    • Author(s)
      古谷有, 新山優樹, 仙洞田雄一
    • Organizer
      第31回理論天文学宇宙物理学懇談会シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 5×10^14g付近の質量を持つPBHへの宇宙ガンマ線観測からの制限2017

    • Author(s)
      仙洞田雄一
    • Organizer
      相対論宇宙論 東北研究会 2017
    • Related Report
      2017 Research-status Report
  • [Presentation] 5×10^14g付近の質量を持つPBHへの宇宙ガンマ線観測からの制限2017

    • Author(s)
      仙洞田雄一
    • Organizer
      第6回観測的宇宙論ワークショップ
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 原始ブラックホールの観測的制限2017

    • Author(s)
      仙洞田雄一
    • Organizer
      第30回理論天文学宇宙物理学懇談会シンポジウム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Gamma-ray constraints on the primordial black hole mass function around and above 5×10^{14} grams2017

    • Author(s)
      Yuuiti Sendouda
    • Organizer
      Workshop on Primordial Black Holes
    • Place of Presentation
      Institute of Physics, Academia Sinica, Taipei, R.O.C.
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Einstein-Weyl重力理論に対するインフレーション起源ベクトル摂動からの制限II2017

    • Author(s)
      新山優樹, 古谷有, 仙洞田雄一
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学 豊中キャンパス
    • Related Report
      2016 Research-status Report
  • [Presentation] Bianchi I型の初期非等方性を持つ宇宙での原始重力波の量子化2017

    • Author(s)
      古谷有, 新山優樹, 仙洞田雄一
    • Organizer
      日本物理学会第72回年次大会
    • Place of Presentation
      大阪大学 豊中キャンパス
    • Related Report
      2016 Research-status Report
  • [Presentation] Einstein-Weyl重力理論に対するインフレーション起源ベクトル摂動からの制限2016

    • Author(s)
      新山優樹, 古谷有, 仙洞田雄一
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      宮崎大学 木花キャンパス
    • Related Report
      2016 Research-status Report
  • [Presentation] Kasner-de Sitterインフレーションでの原始背景重力波:初期非等方性に対する観測的制限2016

    • Author(s)
      古谷有, 新山優樹, 仙洞田雄一
    • Organizer
      日本物理学会2016年秋季大会
    • Place of Presentation
      宮崎大学 木花キャンパス
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2022-02-22  

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