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pro vyhledávání: '"Maeda, Hideki"'
Autor:
Maeda, Hideki
We present exact solutions describing a fake Schwarzschild black hole that cannot be distinguished from the Schwarzschild black hole by observations. They are constructed by attaching a spherically symmetric dynamical interior solution with a matter
Externí odkaz:
http://arxiv.org/abs/2410.11937
Autor:
Maeda, Hideki, Podolsky, Jiri
Publikováno v:
Prog. Theor. Exp. Phys. (2024) 113E03 (PTEP, Volume 2024, Issue 11)
Under the (anti-)self-dual condition for orthonormal components of the Faraday tensor, the 3D Einstein-Maxwell system with a negative cosmological constant $\Lambda$ admits a solution obtained by Kamata and Koikawa and later by Cataldo and Salgado in
Externí odkaz:
http://arxiv.org/abs/2408.16056
Autor:
Maeda, Hideki, Martinez, Cristian
Publikováno v:
Class.Quant.Grav. 41 (2024) 24, 245013
Without specifying a matter field nor imposing energy conditions, we study Killing horizons in $n(\ge 3)$-dimensional static solutions in general relativity with an $(n-2)$-dimensional Einstein base manifold. Assuming linear relations $p_{\rm r}\sime
Externí odkaz:
http://arxiv.org/abs/2402.11012
Autor:
Maeda, Hideki, Podolsky, Jiri
Publikováno v:
Class.Quant.Grav. 41 (2024) 11, 115012
We revisit the charged rotating Ba\~nados-Teitelboim-Zanelli (BTZ) solution in the three-dimensional Einstein-Maxwell-$\Lambda$ system. After the erroneous announcement of its discovery at the end of the original BTZ paper in 1992, the solution was f
Externí odkaz:
http://arxiv.org/abs/2311.07671
Autor:
Maeda, Hideki
Publikováno v:
Class.Quant.Grav. 40 (2023) 19, 195009
We study energy conditions for non-timelike thin shells in arbitrary $n(\ge 3)$ dimensions. It is shown that the induced energy-momentum tensor $t_{\mu\nu}$ on a shell $\Sigma$ is of the Hawking-Ellis type I if $\Sigma$ is spacelike and either of typ
Externí odkaz:
http://arxiv.org/abs/2306.07326
Autor:
Maeda, Hideki
Publikováno v:
Class.Quant.Grav. 40 (2023) 8, 085014
We obtain the general $n(\ge 4)$-dimensional static solution with an $(n-2)$-dimensional Einstein base manifold for a perfect fluid obeying a linear equation of state $p=-(n-3)\rho/(n+1)$. It is a generalization of Semiz's four-dimensional general so
Externí odkaz:
http://arxiv.org/abs/2210.10795
Publikováno v:
Class. Quant. Grav. 39 (2022) 21, 215011
We thoroughly investigate conformally Schwarzschild spacetimes in different coordinate systems to seek for physically reasonable models of a cosmological black hole. We assume that a conformal factor depends only on the time coordinate and that the s
Externí odkaz:
http://arxiv.org/abs/2206.10998
Autor:
Maeda, Hideki, Harada, Tomohiro
Publikováno v:
Class. Quant. Grav. 39 (2022) 19, 195002
In model building studies, it is important to check the energy conditions for the corresponding energy-momentum tensor determined by the gravitational field equations in order to single out physically reasonable models. In this process, one often enc
Externí odkaz:
http://arxiv.org/abs/2205.12993
Autor:
Maeda, Hideki
Publikováno v:
Class.Quant.Grav. 39 (2022) 7, 075027
We present a static and axisymmetric traversable wormhole spacetime with vanishing Arnowitt-Deser-Misner (ADM) mass which is characterized by a length parameter $l$ and a deformation parameter $a$ and reduces to the massless Kerr vacuum wormhole as $
Externí odkaz:
http://arxiv.org/abs/2107.07052
Autor:
Maeda, Hideki
Publikováno v:
JHEP 11 (2022) 108
We propose seven criteria to single out physically reasonable non-singular black-hole models and adopt them to four different spherically symmetric models with a regular center and their rotating counterparts. In general relativity, all such non-sing
Externí odkaz:
http://arxiv.org/abs/2107.04791