Stable wormholes in scalar-tensor theories
Sign Up to like & getrecommendations! Published in 2019 at "Journal of High Energy Physics"
DOI: 10.1007/jhep01(2019)221
Abstract: A bstractWe reconsider the issue of whether scalar-tensor theories can admit stable wormhole configurations supported by a non-trivial radial profile for the scalar field. Using a recently proposed effective theory for perturbations around static, spherically… read more here.
Keywords: stable wormholes; scalar tensor; tensor theories; wormholes scalar ... See more keywords
Probing observational bounds on scalar-tensor theories from standard sirens
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.044041
Abstract: Standard sirens are the gravitational wave (GW) analog of the astronomical standard candles, and can provide powerful information about the dynamics of the Universe. In this work, we simulate a catalog with 1000 standard siren… read more here.
Keywords: probing observational; scalar tensor; standard sirens; tensor theories ... See more keywords
Disformal transformation of stationary and axisymmetric solutions in modified gravity
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DOI: 10.1103/physrevd.102.124017
Abstract: The extended scalar-tensor and vector-tensor theories admit black hole solutions with the nontrivial profiles of the scalar and vector fields, respectively. The disformal transformation maps a solution in a class of the scalar-tensor or vector-tensor… read more here.
Keywords: tensor; scalar tensor; stationary axisymmetric; tensor theories ... See more keywords
Dynamics of compact binary systems in scalar-tensor theories: Equations of motion to the third post-Newtonian order
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DOI: 10.1103/physrevd.98.044004
Abstract: Scalar-tensor theories are one of the most natural and well-constrained alternative theories of gravity, while still allowing for significant deviations from general relativity. We present the equations of motion of nonspinning compact binary systems at… read more here.
Keywords: compact binary; order; binary systems; equations motion ... See more keywords
On the evolution and stability of cosmological perturbations in higher order scalar–tensor theories of gravity
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DOI: 10.1139/cjp-2017-0495
Abstract: We study a new type of extended theory of gravity in the framework of general scalar–tensor theories in which the higher order terms of curvature are coupled with a scalar field and its derivatives. We… read more here.
Keywords: scalar tensor; stability; higher order; evolution ... See more keywords