Zobrazeno 1 - 10
of 170
pro vyhledávání: '"Tattersall, P J"'
Autor:
Aurrekoetxea, Josu C., Ferreira, Pedro G., Clough, Katy, Lim, Eugene A., Tattersall, Oliver J.
We study the generation and propagation of gravitational waves in scalar-tensor gravity using numerical relativity simulations of scalar field collapses beyond spherical symmetry. This allows us to compare the tensor and additional massive scalar wav
Externí odkaz:
http://arxiv.org/abs/2205.15878
Publikováno v:
Phys. Rev. D 103, 124013 (2021)
The ringdown of a perturbed black hole contains fundamental information about space-time in the form of Quasi Normal Modes (QNM). Modifications to general relativity, or extended profiles of other fields surrounding the black hole, so called "black h
Externí odkaz:
http://arxiv.org/abs/2103.00026
Publikováno v:
Phys. Rev. D 101, 084018 (2020)
The decay timescales of the quasinormal modes of a massive scalar field have an intriguing behavior: they either grow or decay with increasing angular harmonic numbers $\ell$, depending on whether the mass of the scalar field is small or large. We id
Externí odkaz:
http://arxiv.org/abs/2002.01897
Autor:
Tattersall, Oliver J.
The odd parity gravitational Quasi-Normal Mode spectrum of black holes with non-trivial scalar hair in Horndeski gravity is investigated. We study `almost' Schwarzschild black holes such that any modifications to the spacetime geometry (including the
Externí odkaz:
http://arxiv.org/abs/1911.07593
Akademický článek
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Publikováno v:
Phys. Rev. D 101, 024011 (2020)
Scale invariant theories of gravity give a compelling explanation to the early and late time acceleration of the Universe. Unlike most scalar-tensor theories, fifth forces are absent and it would therefore seem impossible to distinguish scale invaria
Externí odkaz:
http://arxiv.org/abs/1910.04480
Publikováno v:
Phys. Rev. D 99, 104082 (2019)
We investigate the prospect of using black hole spectroscopy to constrain the parameters of Horndeski gravity through observations of gravitational waves from perturbed black holes. We study the gravitational waves emitted during ringdown from black
Externí odkaz:
http://arxiv.org/abs/1904.05112
Akademický článek
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Autor:
Tattersall, Oliver J.
Publikováno v:
Phys. Rev. D 98, 104013 (2018)
We study the perturbations of scalar, vector, and tensor fields in a slowly rotating Kerr-(Anti-)de Sitter black hole spacetime, presenting new and existing Schr\"odinger style master equations for each type of perturbation up to linear order in blac
Externí odkaz:
http://arxiv.org/abs/1808.10758
Publikováno v:
Phys. Rev. D 97, 104047 (2018)
We study the perturbations to General Relativistic black holes (i.e. those without scalar hair) in Horndeski scalar-tensor gravity. First, we derive the equations of odd and even parity perturbations of both the metric and scalar field in the case of
Externí odkaz:
http://arxiv.org/abs/1804.08950