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Conservation laws for collisions of branes (or shells) in general relativity
David Langlois, Kei-ichi Maeda, David Wands
We consider the collision of self-gravitating n-branes in a (n+2)-dimensional spacetime. We show that there is a geometrical constraint which can be expressed as a simple sum rule…
Hypernova Nucleosynthesis and Early Chemical Evolution
Ken'ichi Nomoto, Keiichi Maeda, Hideyuki Umeda
We review the characteristics of nucleosynthesis in 'Hypernovae', i.e., supernovae with very large explosion energies ($ \gsim 10^{52} $ ergs). The hypernova yields compared to tho…
Inhomogeneities in Newtonian Cosmology and its Backreaction to the Evolution of the Universe
Takayuki Tatekawa, Momoko Suda, Kei-ichi Maeda +1
We study an effect of inhomogeneity of density distribution of the Universe. We propose a new Lagrangian perturbation theory with a backreaction effect by inhomogeneity. The inhomo…
Density Discontinuity of a Neutron Star and Gravitational Waves
Hajime Sotani, Kazuhiro Tominaga, Kei-ichi Maeda
We calculate quasi-normal f- and g-modes of a neutron star with density discontinuity, which may appear in a phase transition at extreme high density. We find that discontinuity wi…
Quintessence in a Brane World
Shuntaro Mizuno, Kei-ichi Maeda
We reanalyze a new quintessence scenario in a brane world model, assuming that a quintessence scalar field is confined in our 3-dimensional brane world. We study three typical quin…
Internal structure of Skyrme black hole
Takashi Tamaki, Kei-ichi Maeda, Takashi Torii
We consider the internal structure of the Skyrme black hole under a static and spherically symmetric ansatz. $@u8(Be concentrate on solutions with the node number one and with the…