EARLY UNIVERSE AND GALAXY FORMATION

早期宇宙和星系形成

• 批准号: 61540185
• 负责人: TOMITA Kenji
• 金额: $ 1.09万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61540185/
• 关键词: Early Universe; Galaxy Formation; Cosmology; ダークマター; 銀河

In the first fiscal year (1986), we had a research seminar of the title "Gravitational Theory and the Early Universe" in which we discussed with about 20 workres about the present state and future of our cosmological problems, and started our studies on the early universe and galaxy formation which were continued in 1987 and 1988. They are divided to the following five articles:1. The appearance of quantum fluctuations and their classicalization in the early universe, especially in inflationary stages of the universe were studied. 2. Time evolution of density perturbations in a gauge-invariant formalism in a universe with baryons, photons and collisionless dark matter was numerically derived. The anisotropy of the cosmic background radiation was also derived and compared with the obsevational values. 3. Theoretical relations among observational quantities in a linear gauge-invariant formalism were derived. 4. Nonlinear evolution in an inhomogeneous universe was studied using a method of N body simulation and the large-scale structure of the universe could be simulated. 5. The propagation of light in a nonlinearly inhomogeneous model was studied using the above model of the inhomogeneous universe as a background, and it was shown that the gravitational lens effect was important in observations for remote sources.From now on we shall develop further our studies upon the basis which have so far been constructed. Especially we shall put attention to the gravitational lens effect for this purpose.

第一财年（1986年），我们举办了题为“引力理论与早期宇宙”的研究研讨会，与大约20名工作人员讨论了我们宇宙学问题的现状和未来，并开始了对宇宙学问题的研究。早期宇宙和星系形成，于1987年和1988年继续进行。分为以下五篇文章： 1．研究了早期宇宙，特别是宇宙暴胀阶段中量子涨落的出现及其经典化。 2. 数值导出了具有重子、光子和无碰撞暗物质的宇宙中规范不变形式主义中密度扰动的时间演化。还导出了宇宙背景辐射的各向异性并与观测值进行了比较。 3. 推导了线性规范不变形式中观测量之间的理论关系。 4、采用N体模拟方法研究非均匀宇宙中的非线性演化，可以模拟宇宙的大尺度结构。 5.以上述非均匀宇宙模型为背景，研究了光在非线性非均匀模型中的传播，表明引力透镜效应在远源观测中的重要作用。今后我们将进一步发展我们的研究。在此基础上进行的研究。为此我们特别要关注引力透镜效应。

项目成果

冨田憲二,杉山直: Progress of Theoretical Physics.

富田健二、杉山奈央：理论物理学进展。

Tomita, Kenji: "The Dipole Anisotropy in the Decaying-Particle Universe Models with Nonzero Cosmological Constant" Progress of Theoretical Physics. 78. 1288-1299 (1987)

富田健二：“具有非零宇宙常数的衰变粒子宇宙模型中的偶极子各向异性”理论物理进展。

冨田憲二,田光江: Physical Review. D34. 3570-3583 (1986)

Kenji Tomita，Mitsue Ta：物理评论 D34（1986）。

冨田憲二: Proceedings of Fifth Marcel Grossmann Meeting. 5. (1989)

Kenji Tomita：第五次马塞尔·格罗斯曼会议记录，5。（1989）

冨田憲二: Progress of Theoretical Physics. 79. (1988)

富田健二：理论物理学进展79。（1988）