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    • Plusieurs versions

    Tidal deformation of a slowly rotating black hole

    Poisson, Eric
    arXiv.org, Jan 7, 2015 [Revue évaluée par les pairs]

    • Dissertation
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    Tidal Deformations of Compact Bodies in General Relativity

    Landry, Philippe
    University of Guelph
    Disponible
    Plus…
    Titre: Tidal Deformations of Compact Bodies in General Relativity
    Auteur: Landry, Philippe
    Contributeur: Poisson, Eric
    Date: 2014
    Sujet: Gravity ; General Relativity ; Newtonian Gravity ; Tides ; Tidal Deformations ; Black Holes ; Neutron Stars ; Love Numbers ; Compact Bodies ; Higher Dimensional
    Description: In Newtonian gravity, the tidal deformability of an astronomical body is measured by its tidal Love numbers, dimensionless coupling constants which depend on the body's composition. The gravitational Love numbers characterize the body's response to the tidal field through the change in its gravitational potential; the surficial Love numbers do likewise through the deformation of its surface. The gravitational Love numbers were promoted to a relativistic setting by Damour and Nagar, and Binnington and Poisson. We present an improved computational procedure for calculating them, and place bounds on the gravitational Love numbers of perfect fluid bodies. We also provide a covariant definition of relativistic surficial Love numbers, develop a unified theory of surface deformations for material bodies and black holes, and derive a simple relation between the gravitational and surficial Love numbers in general relativity. Additionally, we formulate a theory of Newtonian tides in higher dimensions.

    • Plusieurs versions

    Nonrotating black hole in a post-Newtonian tidal environment II

    Poisson, Eric, Corrigan, Eamonn
    arXiv.org, Jun 4, 2018 [Revue évaluée par les pairs]

    • Plusieurs versions

    Gravitomagnetic response of an irrotational body to an applied tidal field

    Landry, Philippe, Poisson, Eric
    arXiv.org, Apr 24, 2015 [Revue évaluée par les pairs]

    • Plusieurs versions

    Relativistic theory of surficial Love numbers

    Landry, Philippe, Poisson, Eric
    arXiv.org, Apr 27, 2014 [Revue évaluée par les pairs]

    • Dissertation
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    Titre: The static self-force in Schwarzschild-de Sitter and Schwarzschild-Anti-de Sitter spacetimes
    Auteur: Kuchar, Joseph
    Contributeur: Poisson, Eric
    Date: 2013
    Sujet: Gravity ; Self-force ; General Relativity ; Static Charge
    Description: I investigate the self-force acting on static scalar and electric charges in Schwarzschild-de Sitter and Schwarzschild-Anti-de Sitter spacetimes. The self-force occurs when a charged particle's field interacts with the curvature of spacetime so that the particle interacts with its own field. Because the field of a point particle is singular at the location of the particle, it is necessary to decompose the field into a regular part responsible for the self-force and a singular part that does not contribute to the self-force. To do this, I use the mode-sum regularization scheme introduced by Barack and Ori, in which the field is decomposed into a sum over modes, and the singular part is removed from each mode using so-called regularization parameters. I find that the electrostatic self-force in Schwarzschild-de Sitter and Schwarzschild-Anti-de Sitter behaves similarly to Schwarzschild self-force near the black hole, but can deviate strongly at larger distances. This is especially true in Schwarzschild-Anti-de Sitter, where the self-force is seen to increase linearly with distance. I provide an explanation for this behaviour using conformal transformations. A particular feature evident in Schwarzschild-Anti-de Sitter is that the self-force can become negative (attractive) at small distances when the Schwarzschild radius and the cosmological length scale are of a similar order. I find that the scalar self-force in Schwarzschild-de Sitter can not actually be computed, and in Schwarzschild-Anti-de Sitter the asymptotic behaviour is similar to its electrostatic counterpart.

    • Plusieurs versions

    EZ gauge is singular at the event horizon

    Corrigan, Eamonn, Poisson, Eric
    arXiv.org, Jun 4, 2018 [Revue évaluée par les pairs]

    • Dissertation
    Sélectionner

    Self-force on a point particle falling into a Reissner-Nordstrom black hole

    Zimmerman, Peter
    University of Guelph
    Disponible
    Plus…
    Titre: Self-force on a point particle falling into a Reissner-Nordstrom black hole
    Auteur: Zimmerman, Peter
    Contributeur: Poisson, Eric
    Date: 2011
    Description: I investigate the electromagnetic self-force on a point charge falling radially into a Reissner-Nordstrom black hole. The self-force results from an interaction between a small piece of the radiated field emitted by the particle in its past history that has backscattered off the spacetime curvature and returns to the particle at its current location. To compute the radiation field, I first perform a multipole decomposition of the relevant components of the electromagnetic field strength tensor. I then numerically calculate the field multipoles mode-by-mode using the second-order characteristic scheme of Lousto and Price. The radiation field constructed from the summed modes still contains a local contribution that is formally divergent at the location of the particle. To split the field into divergent and non-divergent pieces, I adopt the Detweiler-Whiting singular-regular decomposition. A regularization mechanism is required to remove the singular piece of the full field in order to obtain the field responsible for the self-force. To regularize the field, I implement the mode-sum method introduced by Barack and Ori. This procedure involves computing the multipole coefficients of the singular field, which leads to the regularization parameters A, B, C, and D. The regularization parameters that represent the singular field involve acceleration terms resulting from the static electromagnetic field sourced by the charged black hole. This is the first self-force computation to incorporate acceleration terms into the regularization parameters. I compute the self-force on a particle starting from rest for a range of charge values of the black hole. This data is used to examine how the self-force behaves as a function of charge. I find that the self-force is repulsive and increases with the black hole's charge.

    • Plusieurs versions

    Self-force as a probe of global structure

    Davidson, Karl, Poisson, Eric
    arXiv.org, Jun 4, 2018 [Revue évaluée par les pairs]

    • Plusieurs versions

    Self-force as probe of internal structure

    Isoyama, Soichiro, Poisson, Eric
    arXiv.org, Jun 21, 2012 [Revue évaluée par les pairs]