منابع مشابه
Mass Definitions for Boson Stars in Brans Dicke Gravity
We consider boson stars in Brans Dicke gravity, focusing on general ω weak field solutions and ω = −1 strong field solutions. We discuss three definitions of quasilocal mass adapted to the spherical symmetry of the solutions: the Schwarzschild mass, the Keplerian mass and the Tensor mass, and discuss how the asymptotic values of these masses may be derived from an ADM-like formula. We show that...
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According to previous work, topological defects expand exponentially without an end if the vacuum expectation value of the Higgs field is of the order of the Planck mass. We extend the study of inflating topological defects to the Brans-Dicke gravity. With the help of numerical simulation we investigate the dynamics and spacetime structure of a global monopole. Contrary to the case of the Einst...
متن کاملWiggly Strings in Linearized Brans-dicke Gravity
The metric around a wiggly cosmic string is calculated in the linear approximation of Brans-Dicke theory of gravitation. The equations of motion for relativistic and nonrelativistic particles in this metric are obtained. Light propagation is also studied and it is shown that photon trajectories can be bounded. PACS numbers: 98.80.Cq 04.50.+h 11.27.+d Electronic mail: [email protected] El...
متن کاملRenormalization in quantum Brans-Dicke gravity
In the Brans-Dicke model we treat the scalar field exactly and expand the gravitational field in a power series. A comparison with 2D sigma models and φ perturbation theory in four dimensions suggests that the perturbation series in 4D Brans-Dicke model is renormalizable.
متن کاملPrimordial and late-time inflation in Brans-Dicke cosmology
The basic motivation of this work is to attempt to explain the rapid primordial inflation and the observed slow late-time inflation by using the BransDicke theory of gravity. We show that the ratio of these two inflation parameters is proportional to the square root of the Brans-Dicke parameter ω (ω ≫ 1). We also calculate the Hubble parameter H and the time variation of the time dependent Newt...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2009
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.79.124045