Structure Formation due to Spatial Curvature Perturbations in the Universe

宇宙空间曲率扰动导致的结构形成

• 批准号: 04804010
• 负责人: TOMITA Kenji
• 金额: $ 0.77万
• 依托单位: KYOTO 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: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04804010/
• 关键词: Cosmology; Galaxy Formation; Gravitational Instability; 動力不安定性; 構造形成

It is one of the most important works to study the mutual relation between the theories of structure formation (for galaxies and clusters of galaxies) and the observation of anisotropy of the cosmic background radiation. After the detection of the temperature fluctuation by the COBE measurement, this study has reached the stage of new development. In the present study project I engaged in the following articles. In the 1992 fiscal year I put attention to the secondary density perturbations caused by the first-order irregular spatial curvature and analyzed their behaviors, to avoid the contradiction between the theories and observation. This result and the other studies on the temperature fluctuation showed us that this perturbations play a role in the small-scale irregularities.In the 1993 fiscal year, I studied continuously the above density perturbations and the derivation of inhomogeneous cosmological models in the Anti-Newtoninan approximation. In addition, I had the following two activities :1. Studies on the observational implications of the above density perturbations, the gravitaional lens effect associated with the large-scale clustering of high-redshift QSOs, and the masking effect and dust obscuration due to foreground galaxies for the background high-redshift QSOs.2. The Colloquium on High-Redshift Objects and Gravitational Lens Effect (held in the Uji Research Center in Yukawa Institute for Theoretical Physics, on Dec.6 - 8th, 1993). We had about 25 participants. As it was held just after the discovery of MACHO(new gravitationally lensed objects), participants were much exited and earnestly discussed. This colloquium was very significant.

它是研究结构形成理论（用于星系的星系和星系簇）与观察宇宙背景辐射各向异性的最重要关系之一。通过COBE测量检测温度波动后，这项研究已达到新发展的阶段。在本研究项目中，我从事以下文章。在1992财政年度，我将注意力集中在一阶不规则空间曲率引起的二级密度扰动并分析其行为，以避免理论与观察之间的矛盾。这一结果以及对温度波动的其他研究表明，这种扰动在小尺度的不规则性中起作用。在1993财政年度，我不断地研究了抗Newtoninan的上述密度扰动和不均匀宇宙学模型的推导近似。此外，我进行了以下两个活动：1。对上述密度扰动的观察意义的研究，与高红移QSO的大规模聚类相关的引力透镜效应，以及由于背景高降低QSOS.2的前景星系而引起的掩蔽效应和灰尘遮挡。高红移对象和重力镜头效应的座谈会（在Yukawa理论物理学研究所的UJI研究中心举行，于1993年12月6日至8日）。我们有大约25名参与者。在发现男子气概（新的重力镜头对象）之后举行的那样，参与者大大退出并认真讨论了。这个座谈会非常重要。

项目成果

冨田憲二: "Density Perturbations Driven by the Irregular Spatial Curvature in Inhomogeneous Cosmological Models" Astrophysical Journal. 394. 401-408 (1992)

Kenji Tomita：“非均匀宇宙学模型中不规则空间曲率驱动的密度扰动”《天体物理学杂志》394. 401-408 (1992)。

Kenji Tomita: "Homogenization of Inhomogeneous Cosmological Models" Phys.Rev.D. Vol.48, No.12. 5634-5641 (1993)

Kenji Tomita：“非均匀宇宙学模型的均质化”Phys.Rev.D。

冨田憲二: "Image Deformation due to Gravitational Lensing Associated with High-Redshift Quasar Clustering" Proceedings of 3lst Liege International Astrophysical Conference. 31. 587-592 (1993)

Kenji Tomita：“与高红移类星体聚类相关的引力透镜引起的图像变形”第三届列日国际天体物理学会议记录31. 587-592 (1993)。

Kenji Tomita, Kazuya Watanabe, and Hideyuki Tagoshi: "Masking Effect on High-Redshift QSOs due to Foreground Galaxies" Publications of Astronomical Society of Japan. Vol.45, No.4. 487-495 (1993)

Kenji Tomita、Kazuya Watanabe 和 Hideyuki Tagoshi：“前景星系对高红移 QSO 的掩蔽效应”，日本天文学会出版物。

冨田憲二: "Homogenization of Inhomogeneous Cosmological Models" Phys.Rev.D. 48. 5634-5641 (1993)

Kenji Tomita：“非均匀宇宙学模型的均质化”Phys.Rev.D 48. 5634-5641 (1993)