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The Minimum Mass of the First Stars and the Anthropic Principle
Takashi Nakamura, Hideya Uehara, Takeshi Chiba
The lower limit of the mass of the first stars suggested recently may imply the formation of massive stars of mass greater than 8 solar mass irrespective of the details of the init…
Scalar gravitational wave from Oppenheimer-Snyder collapse in scalar- tensor theories of gravity
Tomohiro Harada, Takeshi Chiba, Ken-ichi Nakao +1
Unlike general relativity, scalar-tensor theories of gravity predict scalar gravitational waves even from a spherically symmetric gravitational collapse. We solve numerically the g…
Critical Behavior in the Brans-Dicke Theory of Gravitation
Takeshi Chiba, Jiro Soda
The collapse of a massless scalar field in the Brans-Dicke theory of gravitation is studied in the analysis of both analytical solution and numerical one. By conformally transformi…