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- Waseda UniversityJP9 papers
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6 papers · 1 filter
Asymptotically Friedmann self-similar scalar field solutions with potential
Masanori Kyo, Tomohiro Harada, Hideki Maeda
We investigate self-similar solutions which are asymptotic to the Friedmann universe at spatial infinity and contain a scalar field with potential. The potential is required to be…
Static and symmetric wormholes respecting energy conditions in Einstein-Gauss-Bonnet gravity
Hideki Maeda, Masato Nozawa
Properties of -dimensional static wormhole solutions are investigated in Einstein-Gauss-Bonnet gravity with or without a cosmological constant . We assume that the spa…
Dynamical black holes with symmetry in Einstein-Gauss-Bonnet gravity
Masato Nozawa, Hideki Maeda
We explore various aspects of dynamical black holes defined by a future outer trapping horizon in -dimensional Einstein-Gauss-Bonnet gravity. In the present paper, we ass…
Self-similar cosmological solutions with dark energy. II: black holes, naked singularities and wormholes
Hideki Maeda, Tomohiro Harada, B. J. Carr
We use a combination of numerical and analytical methods, exploiting the equations derived in a preceding paper, to classify all spherically symmetric self-similar solutions which…
Self-similar cosmological solutions with dark energy. I: formulation and asymptotic analysis
Tomohiro Harada, Hideki Maeda, B. J. Carr
Based on the asymptotic analysis of ordinary differential equations, we classify all spherically symmetric self-similar solutions to the Einstein equations which are asymptotically…
Black Hole Evaporation in an Expanding Universe
Hiromi Saida, Tomohiro Harada, Hideki Maeda
We calculate the quantum radiation power of black holes which are asymptotic to the Einstein-de Sitter universe at spatial and null infinities. We consider two limiting mass accret…