RT info:eu-repo/semantics/bachelorThesis
T1 Emisión y propagación de ondas gravitacionales en fusiones de sistemas binarios
A1 Revilla Peña, Alberto
A2 Universidad de Valladolid. Facultad de Ciencias
K1 Ondas gravitacionales
K1 Sistemas binarios
K1 Relatividad general
K1 Formalismo post-newtoniano
K1 Teoría perturbativa
AB We analyze the phenomena of emission of Gravitational Waves focusing on a binary system of compact objects. This cutting edge topic has experienced a lot of advances on the recent years. The firstobservation of Gravitational Waves on 2015 opened a window to obtain new information from our universe. Multi-messenger astronomy let us receive signals from electromagnetic radiation, neutrinos,cosmic rays and now Gravitational Waves are added to the list. But, building accurate detectors is notenough. To separate the signal of Gravitational Waves from the noise it is necessary to rely on a goodprediction of the wavefront. This is not an easy task due to the non-linearity of General Relativity.We will focus on the first phase of the collision of compact objects where the objects follow an inspiral orbit.As a first approximation, we use the multipole expansion on the typical velocities of the source, working on linearized theory. We compute the wavefront and the power carried by the Gravitational Waves for a binary system taking only the leading term on the multipole expansion (mass quadrupole). The nextstep would be to apply the Post-Newtonian formalism, which is valid for self-gravitating systems inthe region near the source. This is an expansion on low velocities and weak gravitational field thattakes into account the non-linearity of General Relativity. We analyze how this expansion works and compute the general expression of the metric tensor components up to 1PN order in terms of staticpotentials. Finally, we provide some information about the other phases of black holes mergers andabout the signal emitted.
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/63341
UL https://uvadoc.uva.es/handle/10324/63341
LA spa
NO Departamento de Física Teórica, Atómica y Óptica
DS UVaDOC
RD 11-jul-2024