Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1997-12-15
Phys.Rev. D58 (1998) 044016
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
13 pages by RevTeX, epsf.sty, 16 figures, comments added, refs updated, to appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.58.044016
We study the dynamics of a self-gravitating scalar field solitonic object (boson star) in the Jordan-Brans-Dicke (BD) theory of gravity. We show dynamical processes of this system such as (i) black hole formation of perturbed equilibrium configuration on an unstable branch; (ii) migration of perturbed equilibrium configuration from the unstable branch to stable branch; (iii) transition from excited state to a ground state. We find that the dynamical behavior of boson stars in BD theory is quite similar to that in general relativity (GR), with comparable scalar wave emission. We also demonstrate the formation of a stable boson star from a Gaussian scalar field packet with flat gravitational scalar field initial data. This suggests that boson stars can be formed in the BD theory in much the same way as in GR.
Balakrishna Jayashree
Shinkai Hisa-aki
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