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

2003 Fiscal Year Annual Research Report

宇宙初期における時空と物質の変化

Research Project

Project/Area Number 14102004
Research InstitutionThe University of Tokyo

Principal Investigator

佐藤 勝彦  東京大学, 大学院・理学系研究科, 教授 (00111914)

Co-Investigator(Kenkyū-buntansha) 佐々木 節  京都大学, 基礎物理学研究所, 教授 (70162386)
吉村 太彦  東京大学, 宇宙線研究所, 教授 (70108447)
柳田 勉  東京大学, 大学院・理学系研究科, 教授 (10125677)
須藤 靖  東京大学, 大学院・理学系研究科, 助教授 (20206569)
川崎 雅裕  東京大学, 大学院・理学系研究科, 教授 (50202031)
Keywords宇宙論 / 超新星 / 宇宙線 / 重力理論 / 素粒子的宇宙論 / 構造形成 / ニュートリノ / バリオン数生成
Research Abstract

1.ニュートリノ宇宙物理と宇宙線(佐藤・長滝)
ニュートリノ質量階層構造が電子、ミューオン、タウオンとは逆の場合の超新星背景ニュートリノのフラックスを計算し、スーパーカミオカンデで検出することにより1-3の混合角パラメータや質量の2乗差に関して制限が付けられることを示した。又、中性子星から放出される高エネルギー宇宙線は超新星残骸との相互作用により、高エネルギーニュートリノとして観測される可能性を指摘した。
2.多次元宇宙の進化とブレーン世界説(佐々木・白水)
ブレーン宇宙論におけるバルク・インフラトンモデルにおいて、密度揺らぎを解析し、低エネルギー極限で4次元理論が完全に再現されることを示した。また、ガウス・ボンネ理論では余剰次元が約10kmという大きなサイズになり得ることを示した。又、Dブレーンにもとづいたブレーン宇宙論の基礎研究を行った。特に、ブレーン上の重力理論の導出を行い、宇宙項の存在の深い示唆を得た。
3.物質・反物質の非対称性の起源とインフレーション理論(吉村・川崎・柳田)
超対称性理論に基づくSUSY Breaking機構に伴って引き起こされるレプトン非対称性を調べ、現在の宇宙に於けるレプトン非対称の程度を説明出来ることを示した。又、最近発表された宇宙背景放射のデータに基づいて、ハイブリッド・インフレーション宇宙モデルの構築、カーバトン・モデルにおける等曲率揺らぎの生成と制限、大質量星による宇宙の再イオン化を調べた。
4.観測による初期宇宙理論モデルの検証(須藤・樽家)
SDSSの銀河サーベイデータから、ミンコフスキー汎関数・3点相関関数を計算し、銀河分布の非ガウス性の存在とその性質を調べた。また、宇宙のダークバリオン探査専用衛星DIOSの提案とその科学的可能性を検討した。又、宇宙大規模構造に現れる非ガウス的な性質について解析し、質量密度ゆらぎの分布関数に現れる対数正規的な性質が、自己重力天体の密度構造と密接に関係していることを示した。

  • Research Products

    (65 results)

All Other

All Publications (65 results)

  • [Publications] K.Takahashi et al.: "Effects of neutrino oscillation on supernova neutrino : inverted mass hierarchy"Prog.Theor.Phys.. 109. 919 (2003)

  • [Publications] S.Ando et al.: "Detectability of the Supernova Relic Neutrinos and Neutrino Oscillation"Astropart.Phys.. 18. 307-318 (2003)

  • [Publications] S.Ando et al.: "Three-generation study of neutrino spin-flavor conversion in supernova and implication for neutrino magnetic moment"Phys.Lett.B. 559. 113 (2003)

  • [Publications] K.Takahashi et al.: "Shock propagation and neutrino oscillation in supernova"Phys.Rev.D. 68. 023003 (2003)

  • [Publications] K.Kohri et al.: "Upper limit on the mass of RX J1856.5-3754 as a possible quark star"Prog.Theor.Phys.. 109. 765-780 (2003)

  • [Publications] S.Ando et al.: "Resonant spin-flavor conversion of supernova neutrinos : Dependence on presupernova models and future prospects"Phys.Rev.D. 68. 023003 (2003)

  • [Publications] K.Kotake et al.: "Anisotropic Neutrino Radiation in Rotational Core Collapse"Astrophys.J.. 595. 304 (2003)

  • [Publications] K.Kotake et al.: "Gravitational Radiation from Rotational Core Collapse : Effects of Magnetic Fields and Realistic Equation of States"Phys.Rev.D.. (in press). (2004)

  • [Publications] K.Takahashi et al.: "Supernova Neutrinos, Neutrino Oscillations, and the Mass of the Progenitor Star"Phys.Rev D. 68. 113009 (2003)

  • [Publications] G.Watanabe et al.: "Structure of Cold Nuclear matter at Subnuclear densities by Quantum Molecular Dynamics"Phys.Rev C. 68. 035806 (2003)

  • [Publications] S.Ando et al.: "A comprehensive study of neutrino spin-flavor conversion in supernovae and the neutrino mass hierarchy"Journal of Cosmology and Astroparticle Physics. 10. 001 (2003)

  • [Publications] K.Kotake et al.: "Gravitational Collapse of Rotating Massive Stars"Nuclear Physics A. 718. 629c (2003)

  • [Publications] H.Yoshiguchi et al.: "Small-Scale Clustering in the Isotropic Arrival Distribution of Ultra-High-Energy Cosmic Rays"Astrophys.J.. 586. 1211 (2003)

  • [Publications] H.Yoshiguchi et al.: "Arrival Distribution of Ultra-High Energy Cosmic Rays : Prospects for the Future"Astrophys.J.. 592. 311-320 (2003)

  • [Publications] S.Nagataki et al.: "Explosive Nucleosynthesis Associated with Formation of Jet-induce GRBs in Massive Stars"Astrophys.J.. 596. 401-413 (2003)

  • [Publications] S.Nagataki: "High-Energy Neutrinos Produced by interactions of Relativistic Protons in Shocked Pulsar Winds"Astrophys.J.. 600. 883-904 (2004)

  • [Publications] H.Yoshiguchi et al.: "A New Method for Calculating Arrival Distribution of Ultra-High Energy Cosmic Rays above 10^<19> eV"Astrophys.J.. 596. 1044-1052 (2003)

  • [Publications] Y.Sendouda et al.: "Constraints on the Mass Spectrum of Primordial Black Holes and Braneworld Parameters from the Diffuse Photon Background"Phys.Rev.D.. 68. 103510 (2003)

  • [Publications] H.Yoshiguchi et al.: "Numerical Study on Propagation of Ultra-High Energy Cosmic Rays in the Galactic Magnetic Field"Astrophys.J.. (in press). (2004)

  • [Publications] N.Kogo et al.: "Reconstructing the primordial spectrum from WMAP data by the cosmic inversion method"Astrophys.J.. (in press). (2004)

  • [Publications] N.Deruelle et al.: "Newton's law on an Einstein 'Gauss-Bonnet' brane"Prog.Theor.Phys.. 110. 441 (2004)

  • [Publications] I.G.Moss et al.: "Bulk quantum effects for de Sitter branes in AdS(5)"Phys.Rev.D.. 67. 125010 (2003)

  • [Publications] Y.Himemoto et al.: "Constraints on the Mass Spectrum of Primordial Black Holes and Braneworld Parameters from the Diffuse Photon Background"Prog.Theor.Phys.Suppl.. 148. 235 (2003)

  • [Publications] D.Langlois et al.: "Massive scalar states localized on a de Sitter brane"Phys.Rev.D.. 68. 064012 (2003)

  • [Publications] T.Shiromizu et al.: "COMMENT ON SPATIAL INFINITY IN HIGHER DIMENSIONAL SPACETIMES"Phys.Rev.D. (in press). (2004)

  • [Publications] T.Uesugi et al.: "D-BRANEWORLD COSMOLOGY II : HIGHER ORDER CORRECTIONS"Phys.Rev.D. (in press). (2004)

  • [Publications] T.Shiromizu et al.: "KINEMATICAL BOUND IN ASYMPTOTICALLY TRANSLATIONALLY INVARIANT SPACE-TIMES"Phys.Rev.D. 69. 027503 (2004)

  • [Publications] T.Shiromizu et al.: "COSMOLOGICAL CONSTANT AND GRAVITATIONAL THEORY ON D-BRANE"Phys.Rev.D.. 68. 103513 (2003)

  • [Publications] T.Shiromizu et al.: "CAN WE LIVE ON A D-BRANE? EFFECTIVE THEORY ON A SELFGRAVITATING D-BRANE"Phys.Rev.D. 68. 063506 (2003)

  • [Publications] M.Sami et al.: "STEEP INFLATION FOLLOWED BY BORN-INFELD REHEATING"Phys.Lett.B. 568. 118-126 (2003)

  • [Publications] T.Shiromizu et al.: "D BRANE-WORLD COSMOLOGY"Phys.Rev.D. 67. 123517 (2003)

  • [Publications] T.Shiromizu et al.: "EFFECTIVE THEORY FOR CLOSE LIMIT OF TWO-BRANES"Phys.Rev.D. 67. 104011 (2003)

  • [Publications] T.Shiromizu et al.: "LOW-ENERGY EFFECTIVE THEORY FOR TWO BRANE SYSTEMS : COVARIANT CURVATURE FORMULATION"Phys.Rev.D. 67. 084022 (2003)

  • [Publications] T.Torii et al.: "COSMOLOGICAL CONSTANT, DILATON FIELD AND FREUND-RUBIN COMPACTIFICATION"Phys.Lett.B.. 551. 161-165 (2003)

  • [Publications] S.Hayakawa et al.: "GRAVITATION IN THE CODIMENSION TWO BRANE WORLD"Prog.Theor.Phys.Suppl.. 148. 128-135 (2003)

  • [Publications] G.Gibbons et al.: "UNIQUENESS AND NONUNIQUENESS OF STATIC VACUUM BLACK HOLES IN HIGHER DIMENSIONS"Prog.Theor.Phys.Suppl.. 148. 284-290 (2003)

  • [Publications] M.Fukugita et al.: "The Earliest Epoch of Reionisation in the Standard Lambda CDM Model"Mon.Not.Roy.Astron.Soc.. 343. L25-L28 (2003)

  • [Publications] M.Endo et al.: "Cosmic String from D-term Inflation and Curvaton"Phys.Lett.B. 569. 73-80 (2003)

  • [Publications] M.Kawasaki et al.: "Inflation with a running spectral index in supergravity"Phys.Rev.D. 68. 023508 (2003)

  • [Publications] S.Kasuya et al.: "MSSM curvaton in the gauge-mediated SUSY breaking"Phys.Lett.B.. (in press). (2004)

  • [Publications] M.Kawasaki et al.: "Inflation model with lower multipoles of the CMB suppressed"Phys.Lett.B. 570. 151-153 (2003)

  • [Publications] K.Ichikawa et al.: "Comments on the Evolution of Strongly Degenerate Neutrinos in the Early Universe"Phys.Lett.B. 570. 154-160 (2003)

  • [Publications] A.D.Dolgov et al.: "Can modified gravity explain accelerated cosmic expansion?"Phys.Lett.B. 573. 1-4 (2003)

  • [Publications] K.Hamaguchi et al.: "Curvatons in Supersymmetric Models"Phys.Rev.D. (in press). (2004)

  • [Publications] S.Kasuya et al.: "Partially ionizing the universe by decaying particles"Phys.Rev.D. (in press). (2004)

  • [Publications] M.Fujii et al.: "UPPER BOUND ON GLUINO MASS FROM THERMAL LEPTOGENESIS"Phys.Lett.B. 579. 6-12 (2004)

  • [Publications] M.Fujii et al.: "THERMAL LEPTOGENESIS AND GAUGE MEDIATION"Phys.Rev.D. 69. 015006 (2004)

  • [Publications] J.R.Ellis et al.: "SNEUTRINO INFLATION in the LIGHT of WMAP : REHEATING LEPTOGENESIS and FLAVOR VIOLATING LEPTON DECAYS"Phys.Lett.B. 581. 9-18 (2004)

  • [Publications] M.Fukugita et al.: "PREDICTIONS FROM THE FRITZSCH TYPE LEPTON MASS MATRICES"Phys.Lett.B. 562. 273-278 (2003)

  • [Publications] J.Lee et al.: "Modeling Intra-Cluster Gas in Triaxial Dark Halos : An Analytic Approach"Astrophys.J.. 585. 151-160 (2003)

  • [Publications] C.Hikage et al.: "Biasing and Genus Statistics of Dark Matter Halos in the Hubble Volume Simulation"Publ.Astron.Soc. of Japan. 55. 335-344 (2003)

  • [Publications] M.Shimizu et al.: "Mass-temperature relation of galaxy clusters"Astrophys.J.. 590. 197-206 (2003)

  • [Publications] T.Hamana et al.: "Modeling peculiar velocities of dark matter halos"Mon.Not.Roy.Astron.Soc.. 343. 1312-1318 (2004)

  • [Publications] K.Yoshikawa et al.: "Detectability of the Warm/Hot Intergalactic Medium Through Emission Lines of OVII and OVIII"Publ.Astron.Soc.Japan. 55. 911-931 (2003)

  • [Publications] C.Hikage et al.: "Minkowski Functionals of SDSS galaxies I : Analysis of Excursion Sets"Publ.Astron.Soc.Japan. 55. 911-931 (2003)

  • [Publications] M.Oguri et al.: "Arc Statistics in Triaxial Dark Matter Halos : Testing the Collisionless Cold Dark Matter Paradigm"Astrophys.J.. 599. 7-23 (2003)

  • [Publications] N.Inada et al.: "A gravitationally lensed quasar with quadruple images separated by 14.62 arcseconds"Nature. 426. 810-812 (2003)

  • [Publications] T.Hamana et al.: "Properties of host haloes of Lyman-break galaxies and Lyman-alpha Emitters from their number densities and angular clustering"Mon.Not.Roy.Astron.Soc.. 347. 813-823 (2003)

  • [Publications] C.Hikage et al.: "The Distribution function of the Phase sum as a Signature of Phase Correlations Induced by Nonlinear Gravitational Clustering"Astrophys.J.. 600. 553-563 (2004)

  • [Publications] J.Lee et al.: "Reconstructing Three-dimensional Structure of Underlying Triaxial Dark Halos From X-ray and Sunyaev-Zel'dovich Effect"Astrophys.J.. 601. 599-609 (2004)

  • [Publications] A.Taruya et al.: "Gravothermal Catastrophe and Tsallis' Generalized Entropy of Self-Gravitating Systems II"Phyisca A. 318. 387-413 (2003)

  • [Publications] A.Taruya et al.: "Long-term Evolution of Stellar Self-Gravitating System away from the Thermal Equilibrium : connection with non-extensive statistics"Phys.Rev.Lett.. 90. 181101 (2003)

  • [Publications] A.Taruya et al.: "Non-Gaussian Tails of Cosmological Density Distribution Function from Dark Halo Approach"Mon.Not.Roy.Astron.Soc.. 339. 495-504 (2003)

  • [Publications] Y.Ohta et al.: "Evolution of Cosmological Density Distribution Function from the Local Collapse Model"Astrophys.J.. 589. 1-16 (2003)

  • [Publications] A.Taruya et al.: "Gravothermal Catastrophe and Tsallis' Generalized Entropy of Self-Gravitating Systems III"Physica A. 322. 285-312 (2003)

URL: 

Published: 2005-04-18   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi