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Observational constraints on the dark energy models base on modified gravitational theories at large/small distances

Research Project

Project/Area Number 15H06635
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionTokyo University of Science

Principal Investigator

Ryotaro Kase  東京理科大学, 理学部第二部物理学科, 助教 (10756406)

Project Period (FY) 2015-08-28 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords暗黒エネルギー / 修正重力理論 / 宇宙の大規模構造 / 密度ゆらぎの成長率 / 局所重力実験 / 第五の力の遮蔽機構 / ダークエネルギー / インフレーション / プロカ場 / 宇宙物理 / 宇宙論
Outline of Final Research Achievements

In 1998, the late-time cosmic acceleration is discovered from the observations of supernovae. The origin of the source for this acceleration, dubbed dark energy, has not been identified yet. One of the candidates that can explain the late-time cosmic acceleration is a modification of gravity at large distances. For the models based on modified gravitational theories, I revealed the theoretical conditions to avoid instabilities, theoretical prediction of the evolutions of the matter perturbations and its effect to the observables at large distances. I also studied the screening mechanism of the fifth forth at short distances such as the solar system, and clarified the conditions for the models to satisfy local gravity experiments. These studies make a large contribution to distinguish between theoretical models of dark energy based on modified gravity.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Annual Research Report
  • Research Products

    (19 results)

All 2017 2016 2015 Other

All Journal Article (9 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 9 results,  Acknowledgement Compliant: 9 results,  Open Access: 3 results) Presentation (8 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results) Remarks (2 results)

  • [Journal Article] Instabilities in Horndeski-Yang-Mills inflation2017

    • Author(s)
      Jose Beltran Jimenez, Lavinia Heisenberg, Ryotaro Kase, Ryo Namba, Shinji Tsujikawa
    • Journal Title

      Physical Review D

      Volume: 95 Issue: 6 Pages: 063533-063533

    • DOI

      10.1103/physrevd.95.063533

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Absence of solid angle deficit singularities in beyond-generalized Proca theories2016

    • Author(s)
      Lavinia Heisenberg, Ryotaro Kase, and Shinji Tsujikawa
    • Journal Title

      Physical Review D

      Volume: 94 Issue: 12 Pages: 123513-123513

    • DOI

      10.1103/physrevd.94.123513

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Anisotropic cosmological solutions in massive vector theories2016

    • Author(s)
      Lavinia Heisenberg, Ryotaro Kase, Shinji Tsujikawa
    • Journal Title

      Journal of cosmology and astroparticle physics

      Volume: 11 Issue: 11 Pages: 008-008

    • DOI

      10.1088/1475-7516/2016/11/008

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Effective gravitational couplings for cosmological perturbations in generalized Proca theories2016

    • Author(s)
      Antonio De Felice, Lavinia Heisenberg, Ryotaro Kase, Shinji Mukohyama, Shinji Tsujikawa, Ying-li Zhang
    • Journal Title

      Physical Review D

      Volume: 94 Issue: 4 Pages: 044024-044024

    • DOI

      10.1103/physrevd.94.044024

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Beyond generalized Proca theories2016

    • Author(s)
      Lavinia Heisenberg, Ryotaro Kase, Shinji Tsujikawa
    • Journal Title

      Physics Letters B

      Volume: 760 Pages: 617-626

    • DOI

      10.1016/j.physletb.2016.07.052

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Cosmology in generalized Proca theories2016

    • Author(s)
      Antonio De Felice, Lavinia Heisenberg, Ryotaro Kase, Shinji Mukohyama, Shinji Tsujikawa, Ying-li Zhang
    • Journal Title

      Journal of cosmology and astroparticle physics

      Volume: 06 Issue: 06 Pages: 048-048

    • DOI

      10.1088/1475-7516/2016/06/048

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Screening fifth forces in generalized Proca theories2016

    • Author(s)
      Antonio De Felice, Lavinia Heisenberg, Ryotaro Kase, Shinji Tsujikawa, Ying-li Zhang, Gong-Bo Zhao
    • Journal Title

      Physical Review D

      Volume: 93 Issue: 10 Pages: 104016-104016

    • DOI

      10.1103/physrevd.93.104016

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Cosmology with a successful Vainshtein screening in theories beyond Horndeski2016

    • Author(s)
      Ryotaro Kase, Shinji Tsujikawa, Antonio De Felice
    • Journal Title

      Physical Review D

      Volume: 93 Issue: 2 Pages: 024007-024007

    • DOI

      10.1103/physrevd.93.024007

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Conical singularities and the Vainshtein screening in full GLPV theories2016

    • Author(s)
      Ryotaro Kase, Shinji Tsujikawa, Antonio De Felice
    • Journal Title

      JCAP

      Volume: 1603 Issue: 03 Pages: 003-003

    • DOI

      10.1088/1475-7516/2016/03/003

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Absence of conical singularities in beyond-generalized Proca theories2017

    • Author(s)
      加瀬竜太郎
    • 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 Annual Research Report
  • [Presentation] Absence of conical singularities in beyond-generalized Proca theories2016

    • Author(s)
      加瀬竜太郎
    • Organizer
      The 26th Workshop on General Relativity and Gravitation in Japan
    • Place of Presentation
      大阪市立大学
    • Year and Date
      2016-10-26
    • Related Report
      2016 Annual Research Report
  • [Presentation] Cosmology with a successful Vainshtein screening in theories beyond Horndeski2016

    • Author(s)
      加瀬竜太郎
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大学 泉キャンパス
    • Year and Date
      2016-03-21
    • Related Report
      2015 Annual Research Report
  • [Presentation] Effective gravitational couplings for cosmological perturbations in generalized Proca theories2016

    • Author(s)
      加瀬竜太郎
    • Organizer
      Varying Constants and Fundamental Cosmology, VARCOSMOFUN’16
    • Place of Presentation
      Szczecin, Poland
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] Screening fifth forces in generalized Proca theories2016

    • Author(s)
      加瀬竜太郎
    • Organizer
      IF-YITP GR+HEP+Cosmo International Symposium VI
    • Place of Presentation
      Phitsanulok, Thailand
    • Related Report
      2016 Annual Research Report
  • [Presentation] Conical singularities and the Vainshtein screening in full GLPV theories2016

    • Author(s)
      加瀬竜太郎
    • Organizer
      3rd Korea-Japan Workshop on Dark Energy
    • Place of Presentation
      大田 (韓国)
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] Existence and disappearance of conical singularities in GLPV theories2015

    • Author(s)
      加瀬竜太郎
    • Organizer
      JGRG25
    • Place of Presentation
      京都大学 基礎物理学研究所
    • Year and Date
      2015-12-09
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 拡張されたホルンデスキ理論(GLPV理論)におけるヴァインシュタイン機構と局所重力実験からの制限2015

    • Author(s)
      加瀬竜太郎
    • Organizer
      日本物理学会2015年秋季大会
    • Place of Presentation
      大阪市立大学 杉本キャンパス
    • Year and Date
      2015-09-27
    • Related Report
      2015 Annual Research Report
  • [Remarks] 東京理科大学 研究者情報データベース

    • URL

      https://www.tus.ac.jp/ridai/doc/ji/RIJIA01User.php?act=nam&kin=pap&kbn=g&diu=6bb5

    • Related Report
      2016 Annual Research Report
  • [Remarks] 東京理科大学 研究者情報データベース

    • URL

      https://www.tus.ac.jp/ridai/doc/ji/RIJIA01User.php?act=nam&kin=soc&diu=6bb5

    • Related Report
      2016 Annual Research Report

URL: 

Published: 2015-08-26   Modified: 2018-03-22  

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