Study of Dark Energy and Neutrino mass by near future large scale observations

• Project/Area Number: 20K03937
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
• Research Institution: Kyoto Sangyo University
• Principal Investigator: Futamase Toshifumi 京都産業大学, 理学部, 教授 (20209141)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 大規模銀河サーベイ / 超新星 / 弱い重力レンズ / 赤方偏移と虚栄関係 / すばる望遠鏡 / ハッブルテンション / 非一様時空 / ハッブル定数 / 宇宙の非一様性 / アインシュタイン方程式 / 暗黒エネルギー / 重力波 / ハッブルパラメータ / ニュートリノ質量 / 大規模データ

Outline of Research at the Start

近い将来実現されることがすでに決定している近未来の超大規模銀河サーベイ、超新星サーベイの観測データを用いて、ニュートリノ質量の上限、暗黒エネルギーの時間変化の可能性を調べる。ニュートリノ質量の情報は素粒子の統一理論の可能性にとって重要な上方となる。暗黒エネルギーの時間変化の有無は、その起源についての本質的な情報を与えることで非常に重要である。

Outline of Final Research Achievements

It is known that Dark matterand dark energy occupy about 95% of the energy density of the present universe. I studied the observational method to study these dark side of the universe. In particularwe develope a new method to study weak lesing which is actively used in the observation of dark matter and dark energy.
We show that our method does improve the accuracy of the dark matter distribution compared with the previous method. Also we pointed out that the lensing dispersion in the magnitude-redshift relation obtained from the combination of the observation future supenovae and gravitational wave from merging neutron stars
may be used to observe accurately the natore of dark energy.

Academic Significance and Societal Importance of the Research Achievements

天文学の観測装置、および観測技術は現在進行形で発展し、従来の観測方法ではデータに含まれる化学的状を十分引き出すことはできない。本研究では将来的な観測データが含んでいる科学的情報を十分引き出すための方法を提示し実際に実現可能であることを示した点に学術的意義がある。

Research Products

• [Int'l Joint Research] 中国西南天文研究所(中国)
• [Int'l Joint Research] 台湾中央研究院(その他の国・地域)
• [Journal Article] The gauge invariant formulation of the local expansion rate driven by the local average density in an inhomogeneous universe (2023)
  • Author(s): M.Tomonaga, M. Kasai, T. Futamase
  • Journal Title: Progress of THeoretical and EXperimental Physics Volume: 2023 Issue: 3
  • DOI: 10.1093/ptep/ptad020
  • Peer Reviewed / Open Access
• [Journal Article] New highky precise weak gravitational lensing flexion measurement method based on ERA method (2022)
  • Author(s): Y.Okura and T.Futamase
  • Journal Title: MOnthly Notices of Riyal atronimical Society Volume: 56 Pages: 668-692
  • Peer Reviewed / Open Access
• [Journal Article] A comment on the averaging in an inhomogeneous cosmology anfd Hubble constant problem. (2021)
  • Author(s): T. Tomonaga and T. Futamase
  • Journal Title: Progress of Threoretical and Experimental Physics Volume: 2021 Issue: 10 Pages: 103-103
  • DOI: 10.1093/ptep/ptab117
  • Peer Reviewed / Open Access
• [Journal Article] Detection of cosmic magnification via galaxy shear-galaxy number density correlation from HSC survey data (2021)
  • Author(s): X.Liu, D. Liu, Z. Gao, C. Wei, G. Li, L. Fu,T. Futamase, Z. Fun
  • Journal Title: Physical Review D Volume: 103 Issue: 12 Pages: 123504-123504
  • DOI: 10.1103/physrevd.103.123504
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Current status of space gravitational wave antenna DECIGO and B-DECIGO (2021)
  • Author(s): S. Kawamura, H. Shinkai, DECIGO collaboration
  • Journal Title: Progress of Theoretical Experimental Physics Volume: ptab019 Issue: 5 Pages: 103-103
  • DOI: 10.1093/ptep/ptab019
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Standard Candles and Sirens Rescue H_0 (2020)
  • Author(s): A. Aniket, T. Okumura, T. Futamase
  • Journal Title: Astrophysical Journal Volume: 904 Issue: 2 Pages: 169-169
  • DOI: 10.3847/1538-4357/abbffc
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Survey of Gravitationally lensed Objects in HSC Imaging (SuGOHI) ? V. Group-to-cluster scale lens search from the HSC?SSP Survey (2020)
  • Author(s): Jaelani Anton T、More Anupreeta、Oguri Masamune、Sonnenfeld Alessandro、Suyu Sherry H、Rusu Cristian E、Wong Kenneth C、Chan James H H、Kayo Issha、Lee Chien-Hsiu、Chao Dani C-Y、Coupon Jean、Inoue Kaiki T、Futamase Toshifumi
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 495 Issue: 1 Pages: 1291-1310
  • DOI: 10.1093/mnras/staa1062
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Book] ピーブルス先生の量子力学 (2022)
  • Author(s): 二間瀬敏史
  • Total Pages: 376
  • Publisher: 丸善書店
  • ISBN: 9784621307076
• [Book] ブラックホール (2022)
  • Author(s): 二間瀬敏史
  • Total Pages: 224
  • Publisher: 中央公論社
  • ISBN: 9784121026859
• [Book] 相対性理論 基礎と応用 (2020)
  • Author(s): 二間瀬敏史
  • Total Pages: 209
  • Publisher: 朝倉書店
  • ISBN: 9784254131376