Spanish and Portuguese Relativity Meeting

Session

Parallel session 2 (Numerical Relativity)

Jul 22, 2024, 2:30 PM

Conveners

Parallel session 2 (Numerical Relativity)

• Session convener: Óscar Dias

28. A preliminary study of PN1 cross terms contribution in the evolution of EMRIs

Prof. Màrius Josep Fullana i Alfonso (Institut Universitari de Matemàtica Multidisciplinària. Universitat Politècnica de València.)

7/22/24, 2:30 PM

1 Abstract

The study of sources of gravitational waves, which includes the capture of a compact object by a supermassive black hole (an "extreme-mass ratio inspiral, EMRI"), has been approached in relativistic astrophysics with a post-Newtonian treatment (see for example [1] for a complete description). Nevertheless, such estimation is only valid in the two-body problem. From an...

80. Black-hole ringdown and their progenitors: from numerical Relativity to tests of GR

Costantino Pacilio

7/22/24, 2:45 PM

Black-hole ringdowns from binary coalescences encode information about the final state of the remnant through their modes of oscillation, and about their progenitors through the degree of excitation of different modes. We present novel surrogate fits for the excitation amplitudes of black-hole ringdowns from quasi-circular binaries. They are calibrated to numerical relativity simulations and...

17. Improved Binary Black Hole Initial Data

João Rebelo

7/22/24, 3:00 PM

Numerical Relativity stands as a crucial tool in the identification of gravitational wave signals by constructing most of the signal templates used in the Matched Filtering Method. But this simulated collisions are still far from being perfectly realistic. In order to ensure more realistic templates I implement initial data with radiative content, utilizing Post-Newtonian descriptions of the...

77. Reference metrics on hyperboloidal slices for free evolution

Alex Vano-Vinuales (GRIT, CENTRA, IST, University of Lisbon)

7/22/24, 3:15 PM

Gravitational wave radiation is only unambiguously defined at future null infinity - the location in spacetime where light rays arrive and where global properties of spacetimes can be measured. Reaching future null infinity is thus very important for extracting correct waveforms. A convenient way to include it in numerical relativity simulations is via hyperboloidal foliations, which can be...

56. Electrically charged numerical simulations on hyperboloidal slices

João Álvares

7/22/24, 3:30 PM

Gravitational wave radiation is only unambiguously defined at future null infinity: the location in spacetime where light rays arrive and where global properties of spacetimes can be measured. Within the context of numerical relativity we set up simulations reaching future null infinity by using hyperboloidal slices, as opposed to traditional Cauchy slices that reach spacelike infinity....

82. Hyperboloidal evolution in Numerical Relativity: the case of Generalized Harmonic Gauge

Christian Peterson Bórquez

7/22/24, 3:45 PM

In this talk I will discuss the implementation of hyperboloidal coordinates in the Generalized Harmonic Gauge (GHG) formulation of General Relativity within the Dual-Foliation formalism. This approach allows us to include future null infinity in the computational domain, while keeping standard methods for the evolution of the strong field region. First I will mention the asymptotic properties...