Studies on general-relativistic astrophysical phenomena

广义相对论天体物理现象的研究

• 批准号: 12440063
• 负责人: TOMITA Kenji
• 金额: $ 9.47万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12440063/
• 关键词: general ralativity; cosmology; gravitational waves; gravitational lens; space-time singularity; black hole; dark matter; cosmic background radiation; ダークスター; 時空の特異点; 一般相対理論

In this study project we covered the general-relativistic astrophysical phenomena on all space-and-time scales of the Universe and tried to clarify their mutual connections. The studies were performed for 4 years from 2000 to 2003 fiscal year, and many valuable results were obtained. They are classified into three groups : (1) the space-time structure at the very early stages in the neighborhood of the big-bang, (2) phenomena on spatially small scales (gravitational waves, high density stars and black holes), and (3) phenomena on spatially large scales (the non-uniformity, large-scale structures and gravitational lensing). In each of them, the remarkable results are that (1) theories on the multidimensional brane world and our Universe as its four-dimensional section were introduced and studied extensively, (2) the framework of gravitational-wave astrophysics was constructed and the formation mechanism of gamma-ray bursts began to be clarified, and (3) various cosmological observations (like WMAP, SDSS etc) were executed, the cosmological model parameters were determined assuming the cosmological principle and the existence of dark energy was clarified. Many of these results were reported in the Workshops of General Relativity and Gravitation held in Osaka University, Waseda University, University of Tokyo and Osaka City University, and in Workshop of "Frontiers of Cosmology and Gravitation" as well as the other international conferences. These Workshops and conferences were useful for the international communications and the education of young physists in our field.

在这个研究项目中，我们涵盖了宇宙所有时空尺度上的广义相对论天体物理现象，并试图澄清它们之间的相互联系。从2000年到2003年的4年时间里，研究取得了许多有价值的结果。它们被分为三类：（1）大爆炸附近非常早期阶段的时空结构，（2）空间小尺度的现象（引力波，高密度星和黑洞），（3）空间大尺度的现象（非均匀性，大尺度结构和引力透镜）。在这三个阶段中，取得了以下显著的成果：（1）提出并广泛研究了多维膜世界和作为四维截面的我们的宇宙的理论;（2）建立了引力波天体物理学框架，并开始阐明γ射线暴的形成机制;（3）进行了各种宇宙学观测（如WMAP，SDSS等），在假设宇宙学原理的前提下确定了宇宙学模型参数，阐明了暗能量的存在。其中许多结果在大坂大学、早稻田大学、东京大学和大坂市立大学举行的广义相对论和引力研讨会、“宇宙学和引力前沿”研讨会以及其他国际会议上作了报告。这些研讨会和会议对我们领域的国际交流和年轻物理学家的教育很有用。

项目成果

K.Nakao, K.Nakamura, T.Mishima: "Hoop conjecture and cosmic censorship in the brane-world"Phys.Lett B. 564. 143-148 (2003)

K.Nakao、K.Nakamura、T.Mishima：“Hoop 猜想和膜世界中的宇宙审查制度”Phys.Lett B. 564. 143-148 (2003)

K.Ioka, T.Nakamura: "A Possible Origin of Lognormarl Distributions in Gamma-Ray Bursts"Astrophys. J.Letters.. 570. L21-L24 (2002)

K.Ioka，T.Nakamura：“伽马射线爆发中对数正态分布的可能起源”天体物理学。

R.Yamazaki, K.Ioka, T.Nakamura: "X-ray Flashes from Off-axis Gamma-Ray Bursts"Astrophys. J. Letters.. 571. L31-L35 (2002)

R.Yamazaki、K.Ioka、T.Nakamura：“离轴伽马射线暴的 X 射线闪光”天体物理学。

H.Kodama: "Rigidity theorems in the braneworld model"Prog.Theor.Phys.Supplement. 148(印刷中). (2003)

H.Kodama：“膜世界模型中的刚性定理”Prog.Theor.Phys.Suplement 148（印刷中）。

A.Ishibashi, A.Hosoya: "Naked Singularity and Thunderbolt"Phys. Rev.. D66. 104016(6) (2002)

A.Ishibashi、A.Hosoya：“赤裸奇点与雷电”物理。