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6 papers · 2 filters
Black Holes in an Expanding Universe
Gary W. Gibbons, Kei-ichi Maeda
An exact solution representing black holes in an expanding universe is found. The black holes are maximally charged and the universe is expanding with arbitrary equation of state.…
Physics of the interior of a black hole with an exotic scalar matter
Andrey Doroshkevich, Jakob Hansen, Dmitriy Novikov +3
We use a numerical code to consider the nonlinear processes arising when a Reissner-Nordstrom black hole is irradiated by an exotic scalar field (modelled as a free massless scalar…
Dynamics of false vacuum bubbles: beyond the thin shell approximation
Jakob Hansen, Dong-il Hwang, Dong-han Yeom
We numerically study the dynamics of false vacuum bubbles which are inside an almost flat background; we assumed spherical symmetry and the size of the bubble is smaller than the s…
Longterm general relativistic simulation of binary neutron stars collapsing to a black hole
Kenta Kiuchi, Yuichiro Sekiguchi, Masaru Shibata +1
General relativistic simulations for the merger of binary neutron stars are performed as an extension of a previous work\cite{Shibata:2006nm}. We prepare binary neutron stars with…
Passage of radiation through wormholes
Andrey Doroshkevich, Jakob Hansen, Igor Novikov +1
We investigate numerically the process of the passage of a radiation pulse through a wormhole and the subsequent evolution of the wormhole that is caused by the gravitational actio…
Chameleon scalar fields in relativistic gravitational backgrounds
Shinji Tsujikawa, Takashi Tamaki, Reza Tavakol
We study the field profile of a scalar field that couples to a matter fluid (dubbed a chameleon field) in the relativistic gravitational background of a spherically symmetric s…