2023 Fiscal Year Final Research Report
Testing gravitational theories on cosmologically large scales and small scales around the compact object
| Project/Area Number |
20K14471
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
Kase Ryotaro 東京理科大学, 理学部第二部物理学科, 准教授 (10756406)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | 暗黒エネルギー / ブラックホール / 中性子星 / 重力波 / 修正重力理論 |
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| Outline of Final Research Achievements |
This research project aims to tackle unresolved cosmological problems based on modified gravitational theories that extends general relativity, and at the same time to study the nature of black holes and neutron stars that possess strong gravitational fields, and to test the gravitational theories in the two completely different scales: the cosmologically large scale and the small scale of compact objects. The results obtained by carrying out this research project were summarized in the eight papers published in international journals.
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| Free Research Field |
宇宙論，宇宙物理学，重力理論
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| Academic Significance and Societal Importance of the Research Achievements |
本研究課題で得られた成果を特徴付ける学術的意義は，暗黒エネルギーの効果が顕著にあらわれる宇宙論的な大スケールと，ブラックホールや中性子星といった強い重力場をもつコンパクト天体周の小スケールという，異なる二つのスケールから多角的に拡張重力理論の検証を行った点にある．また，一般性を保った理論に基づいて解析を行い，現存する様々な理論模型に対する統一的な検証のための枠組みを提供することで，宇宙論的なスケールにおいては勿論，今後激化する重力波観測を通じた強重力場における重力理論の検証においても土台を成す重要な成果となりうる点で意義深い．
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