• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Modified Gravity and the Accelerated Expansion of the Universe

Research Project

Project/Area Number 22840011
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeSingle-year Grants
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionKyoto University

Principal Investigator

KOBAYASHI Tsutomu  京都大学, 次世代研究者育成センター, 特定助教 (40580212)

Project Period (FY) 2010 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2011: ¥1,495,000 (Direct Cost: ¥1,150,000、Indirect Cost: ¥345,000)
Fiscal Year 2010: ¥1,625,000 (Direct Cost: ¥1,250,000、Indirect Cost: ¥375,000)
Keywordsダークエネルギー / 修正重力理論 / 密度揺らぎ / 重力理論 / 宇宙論 / 初期密度揺らぎ
Research Abstract

We have explored modified theories of gravity as an alternative to dark energy that would be the origin of the current cosmic acceleration. We have studied observational and experimental consequences of modified gravity, and considered how one can distinguish different theories of gravitation. We have also proposed the most general model of inflation in the early Universe, based upon some generic class of modified gravity theories.

Report

(3 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report
  • Research Products

    (48 results)

All 2012 2011 2010 Other

All Journal Article (21 results) (of which Peer Reviewed: 20 results) Presentation (27 results)

  • [Journal Article] Black hole perturbation in the most general scalar-tensor theory with second-order field equations I : the odd-parity sector2012

    • Author(s)
      T. Kobayashi, H. Motohashi and T. Suyama
    • Journal Title

      Phys. Rev.

      Volume: D 85 Pages: 84025-84025

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Vainshtein screening in a cosmological background in the most general second-order scalar-tensor theory2012

    • Author(s)
      R. Kimura, T. Kobayashi and K. Yamamoto
    • Journal Title

      Phys. Rev

      Volume: D 85 Pages: 24023-24023

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Black hole perturbation in the most general scalar-tensor theory with second-order field equations I : the odd-parity sector2012

    • Author(s)
      T.Kobayashi, H.Motohashi, T.Suyama
    • Journal Title

      Physical Review

      Volume: (掲載確定)(未定)

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Vainshtein screening in a cosmological background in the most general second- order scalar tensor theory2012

    • Author(s)
      R. Kimura, T. Kobayashi, K. Yamamoto
    • Journal Title

      Phys. Rev. D

      Volume: 85 Issue: 2 Pages: 24023-24023

    • DOI

      10.1103/physrevd.85.024023

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effective gravitational couplings for cosmological perturbations in the most general scalar-tensor theories with second-order field equations2011

    • Author(s)
      A. De Felice, T. Kobayashi and S. Tsujikawa
    • Journal Title

      Phys. Lett

      Volume: B 706 Pages: 123-123

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] The Music of the Aetherwave-B-mode Polarization in Einstein-Aether Theory2011

    • Author(s)
      M. Nakashima and T. Kobayashi
    • Journal Title

      Phys. Rev

      Volume: D 84 Pages: 8451-8451

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Primordial non-Gaussianities of gravitational waves in the most general single-field inflation model2011

    • Author(s)
      X. Gao, T. Kobayashi, M. Yamaguchi and J.' i. Yokoyama
    • Journal Title

      Phys. Rev

      Volume: 107 Pages: 211301-211301

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Generalized G-inflation : Inflation with the most general second-order field equations2011

    • Author(s)
      T. Kobayashi, M. Yamaguchi and J.' i. Yokoyama
    • Journal Title

      Prog. Theor. Phys

      Volume: 126 Pages: 511-511

    • NAID

      110008790436

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Primordial non-Gaussianity from G-inflation2011

    • Author(s)
      T. Kobayashi, M. Yamaguchi, J. Yokoyama
    • Journal Title

      Phys. Rev

      Volume: D 83 Pages: 103524-103524

    • NAID

      120003338844

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Higgs G-inflation2011

    • Author(s)
      K. Kamada, T. Kobayashi, M. Yamaguchi and J. Yokoyama
    • Journal Title

      Phys. Rev

      Volume: D 83 Pages: 83515-83515

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Effective gravitational couplings for cosmological perturbations in the most general scalar-tensor theories2011

    • Author(s)
      A.De Felice, T.Kobayashi, S.Tsujikawa
    • Journal Title

      Physics Letters B

      Volume: 706 Issue: 2-3 Pages: 123-133

    • DOI

      10.1016/j.physletb.2011.11.028

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Primordial non-Gaussianities of gravitational waves in the most general single-field inflation model2011

    • Author(s)
      X. Gao, T. Kobayashi, M. Yamaguchi and J. Yokoyama
    • Journal Title

      Physical Review Letter

      Volume: 107 Issue: 21 Pages: 211301-211301

    • DOI

      10.1103/physrevlett.107.211301

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Generalized G-inflation : Inflation with the most general second-order field equations2011

    • Author(s)
      Tsutomu Kobayashi, Masahide Yamaguchi, Jun'ichi Yokoyama
    • Journal Title

      Prog. Theor. Phys

      Volume: 126 Issue: 3 Pages: 511-529

    • DOI

      10.1143/ptp.126.511

    • NAID

      110008790436

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Oscillating Bianchi IX Universe in Horava-Lifshitz Gravity2011

    • Author(s)
      Y.Misonoh, K.Maeda, T.Kobayashi
    • Journal Title

      Physical Review

      Volume: D84 Issue: 6 Pages: 0640301-18

    • DOI

      10.1103/physrevd.84.064030

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Higgs G-inflation2011

    • Author(s)
      Kohei Kamada, 他
    • Journal Title

      Phys.Rev.D

      Volume: (掲載決定済)

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] G-inflation : inflation driven by the Galileon field2010

    • Author(s)
      T. Kobayashi, M. Yamaguchi and J. Yokoyama
    • Journal Title

      Phys. Rev. Lett

      Volume: 105 Pages: 231302-231302

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Oscillating Universe in Horava-Lifshitz Gravity2010

    • Author(s)
      K. i. Maeda, Y. Misonoh and T. Kobayashi
    • Journal Title

      Phys. Rev

      Volume: D 82 Pages: 64024-64024

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Oscillating Universe in Horava-Iifshitz Gravity2010

    • Author(s)
      Kei-ichi Maeda, 他
    • Journal Title

      Phys.Rev.D

      Volume: D82

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] G-inflation : Inflation driven by the Galileon field2010

    • Author(s)
      Tsutomu Kobayashi, 他
    • Journal Title

      Phys.Rev.Lett.

      Volume: 105

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] CMB Polarization in Einstein-Aether Theory2010

    • Author(s)
      Masahiro Nakashima, 他
    • Journal Title

      Proceedings of JGRG20 (arXiv:1012.5348)

    • Related Report
      2010 Annual Research Report
  • [Journal Article] Oscillating Bianchi IX Universe in Horava-Lifshitz Gravity

    • Author(s)
      Y. Misonoh, K. i. Maeda and T. Kobayashi
    • Journal Title

      Phys. Rev. D

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Presentation] 拡張された重力理論の宇宙論、高密度天体における観測可能性の研究2012

    • Author(s)
      小林努
    • Organizer
      日本物理学会年次大会
    • Place of Presentation
      関西学院大学
    • Year and Date
      2012-03-25
    • Related Report
      2011 Annual Research Report
  • [Presentation] ダークエネルギーか修正重力か2012

    • Author(s)
      小林努
    • Organizer
      日本物理学会年次大会
    • Place of Presentation
      関西学院大学
    • Year and Date
      2012-03-24
    • Related Report
      2011 Annual Research Report
  • [Presentation] Vainshtein screening in a cosmological background in the most general second-order scalar-tensor theory2012

    • Author(s)
      小林努
    • Organizer
      Testing Gravity with Astrophysical and Cosmological Observations
    • Place of Presentation
      東京大学IPMU
    • Year and Date
      2012-01-25
    • Related Report
      2011 Annual Research Report
  • [Presentation] 拡張された重力理論の宇宙論、高密度天体における観測可能性の研究2012

    • Author(s)
      小林努
    • Organizer
      日本物理学会年次大会
    • Place of Presentation
      関西学院大学,西宮市
    • Related Report
      2011 Final Research Report
  • [Presentation] ダークエネルギーか修正重力か2012

    • Author(s)
      小林努
    • Organizer
      日本物理学会年次大会
    • Place of Presentation
      関西学院大学,西宮市
    • Related Report
      2011 Final Research Report
  • [Presentation] Vainshtein screening in a cosmological background in the most general second-order scalar-tensor theory2012

    • Author(s)
      T. Kobayashi
    • Organizer
      Testing Gravity with Astrophysical and Cosmological Observations
    • Place of Presentation
      IPMU,柏
    • Related Report
      2011 Final Research Report
  • [Presentation] G-inflation and generalized G-inflation2011

    • Author(s)
      小林努
    • Organizer
      The ECTP international conference on primordial QCD Matter in LHC Era
    • Place of Presentation
      カイロ、エジプト
    • Year and Date
      2011-12-06
    • Related Report
      2011 Annual Research Report
  • [Presentation] G-inflation and generalized G-inflation2011

    • Author(s)
      小林努
    • Organizer
      日本・エジプト二国間交流事業「素粒子天体物理学でさぐる初期宇宙の進化」
    • Place of Presentation
      MTI大学、エジプト
    • Year and Date
      2011-12-01
    • Related Report
      2011 Annual Research Report
  • [Presentation] 一般化されたカ〓リレオン場とインフレーション2011

    • Author(s)
      小林努
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      弘前大学
    • Year and Date
      2011-09-16
    • Related Report
      2011 Annual Research Report
  • [Presentation] Galileon Cosmology2011

    • Author(s)
      小林努
    • Organizer
      Summer Institute 2011
    • Place of Presentation
      セミナーハウスFuji Calm、富士吉田(招待講演)
    • Year and Date
      2011-08-03
    • Related Report
      2011 Annual Research Report
  • [Presentation] Generalized Galileons and inflation2011

    • Author(s)
      小林努
    • Organizer
      第11回宇宙における時空・物質・構造の進化
    • Place of Presentation
      熊本県阿蘇郡三愛高原ホテル
    • Year and Date
      2011-07-27
    • Related Report
      2011 Annual Research Report
  • [Presentation] Primordial non-Gaussianity from G-inflation2011

    • Author(s)
      小林努
    • Organizer
      PASCOS2011
    • Place of Presentation
      ケンブリッジ大学、イギリス
    • Year and Date
      2011-07-06
    • Related Report
      2011 Annual Research Report
  • [Presentation] G-inflation and generalized G-inflation2011

    • Author(s)
      T. Kobayashi
    • Organizer
      The ECTP international conference on primordial QCD Matter in LHC Era
    • Place of Presentation
      カイロ,エジプト
    • Related Report
      2011 Final Research Report
  • [Presentation] G-inflation and generalized G-inflation2011

    • Author(s)
      T. Kobayashi
    • Organizer
      日本・エジプト二国間交流事業「素粒子天体物理学でさく.る初期宇宙の進化
    • Place of Presentation
      Egyptian Center for Theoretical Physics, MTI University
    • Related Report
      2011 Final Research Report
  • [Presentation] Generalized G-inflation2011

    • Author(s)
      T. Kobayashi
    • Organizer
      JGRG21
    • Place of Presentation
      東北大学
    • Related Report
      2011 Annual Research Report 2011 Final Research Report
  • [Presentation] 一般化されたガリレオン場とインフレーション2011

    • Author(s)
      小林努
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      弘前大学,弘前市
    • Related Report
      2011 Final Research Report
  • [Presentation] Galileon Cosmology2011

    • Author(s)
      T. Kobayashi
    • Organizer
      ummer Institute 2011(Cosmology & String)
    • Place of Presentation
      Seminar House"Fuji Calm",富士吉田
    • Related Report
      2011 Final Research Report
  • [Presentation] Generalized Galileons and inflation2011

    • Author(s)
      小林努
    • Organizer
      「第11回宇宙における時空・物質・構造の進化」研究会
    • Place of Presentation
      Dark Energy in the Universe'サマースクール(熊本県阿蘇郡三愛高原ホテル)
    • Related Report
      2011 Final Research Report
  • [Presentation] Primordial non-Gaussianity from G-inflation2011

    • Author(s)
      T. Kobayashi
    • Organizer
      PASCOS 2011
    • Place of Presentation
      ケンフ.リッジ大学,イギリス
    • Related Report
      2011 Final Research Report
  • [Presentation] G-inflation2010

    • Author(s)
      小林努
    • Organizer
      COSMO/CosPA 2010
    • Place of Presentation
      東京大学
    • Year and Date
      2010-09-30
    • Related Report
      2010 Annual Research Report
  • [Presentation] Galileon scalar-tensor models of dark energy2010

    • Author(s)
      小林努
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      九州工業大学
    • Year and Date
      2010-09-12
    • Related Report
      2010 Annual Research Report
  • [Presentation] G-inflation2010

    • Author(s)
      小林努
    • Organizer
      第10回宇宙における時空・物質・構造の進化研究会
    • Place of Presentation
      高知工科大学
    • Year and Date
      2010-08-31
    • Related Report
      2010 Annual Research Report
  • [Presentation] G-inflation2010

    • Author(s)
      小林努
    • Organizer
      Summer Institute 2010 (Cosmology & String)
    • Place of Presentation
      セミナーハウス富士Calm
    • Year and Date
      2010-08-09
    • Related Report
      2010 Annual Research Report
  • [Presentation] G-inflation2010

    • Author(s)
      T. Kobayashi
    • Organizer
      Summer Institute 2010(Cosmology & String)
    • Place of Presentation
      Seminar House"Fuji Calm",富士吉田
    • Related Report
      2011 Final Research Report
  • [Presentation] G-inflation2010

    • Author(s)
      T. Kobayashi
    • Organizer
      COSMO/CosPA 2010
    • Place of Presentation
      東京大学本郷キャンパス,日本
    • Related Report
      2011 Final Research Report
  • [Presentation] Galileon scalar-tensor models of dark energy2010

    • Author(s)
      小林努
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      九州工業大学戸畑キャンパス,北九州市
    • Related Report
      2011 Final Research Report
  • [Presentation] G-inflation2010

    • Author(s)
      T. Kobayashi
    • Organizer
      「第10回宇宙における時空・物質・構造の進化」研究会
    • Place of Presentation
      高知パレスホテル/高知工科大学
    • Related Report
      2011 Final Research Report

URL: 

Published: 2010-08-27   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi