| Project/Area Number |
04640312
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
核・宇宙線・素粒子
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|---|
| Research Institution | Waseda University |
|---|
Principal Investigator |
MAEDA Keiichi Waseda Univ, Physics, Professor, 理工学部, 教授 (70199610)
|
|---|
| Project Period (FY) |
1992 – 1993
|
| Project Status |
Completed (Fiscal Year 1993)
|
| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1993: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1992: ¥900,000 (Direct Cost: ¥900,000)
|
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| Keywords | cosmological constant / inhomogeneous spacetime / inflation / superradiance / non-linear physics / Einstein equations / vacuum energy |
|---|
| Research Abstract |
We investigate dynamics of inhomogeneous spacetime with a cosmological constant and find a universal picture : There is a critical value of the Abbott-Deser mass, beyond which localized inhomogeneities do not collapse into black holes. Consequently, black holes with large mass cannot be formed in the asymptotically de Sitter space-time, unless a naked singularity is formed. This result suggests a possible inflationary scenario for inhomogeneous universes.
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