| Project/Area Number |
22KF0178
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| Project/Area Number (Other) |
21F21318 (2021-2022)
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Multi-year Fund (2023)
Single-year Grants (2021-2022) |
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| Section | 外国 |
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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 | Kyoto University |
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Principal Investigator |
向山 信治 京都大学, 基礎物理学研究所, 教授 (40396809)
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| Co-Investigator(Kenkyū-buntansha) |
DI FILIPPO FRANCESCO 京都大学, 基礎物理学研究所, 外国人特別研究員
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| Project Period (FY) |
2023-03-08 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2023: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2022: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2021: ¥300,000 (Direct Cost: ¥300,000)
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| Keywords | gravitation / cosmology / gravitational waves |
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| Outline of Research at the Start |
The research proposal focuses on the analysis of several aspects of physics beyond general relativity to gain as much information as possible on the fundamental theory of gravity. Namely, it focuses on theory and phenomenology of non-singular black holes; tidal Love numbers and quasi-normal modes; information loss problem; minimally modified theories of gravity. The research will be of interest to theorists and experimentalists working in the fields of astrophysics, general relativity, and quantum gravity.
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| Outline of Annual Research Achievements |
The research focused on aspects related to theory and phenomenology and non-singular black holes and the information loss paradox.
Regarding non-singular black holes, Dr. Di Filippo have obtained a constrain regarding the possible presence of a surface for ultracompact objects mimicking supermassive black holes based on the absence of an outgoing thermal flux of radiation. He has also established a connection between regular black holes and ultracompact stars. Finally, he has discussed some aspect concerning the stability of regular black holes.
Regarding the information paradox, the research focused on the introduction of a new techniques to study the quantum states of Hawking radiation. This should be regarded as a first step toward understanding the connection between soft hair and the information paradox.
Finally, Dr. Di Filippo contributed to a book on regular black holes by co-writing a chapter.
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