Astrofyzikální výzvy obecné relativitě
| Thesis title in Czech: | Astrofyzikální výzvy obecné relativitě |
|---|---|
| Thesis title in English: | Challenging General Relativity with astrophysics |
| Academic year of topic announcement: | 2024/2025 |
| Thesis type: | diploma thesis |
| Thesis language: | |
| Department: | Institute of Theoretical Physics (32-UTF) |
| Supervisor: | Ippocratis Saltas |
| Author: |
| Guidelines |
| This project can take various broad directions, either theoretical or numerical depending on the student’s inclination. The common theme underlying the project will be the investigation of the consistency and predictions of general theories of gravity at astrophysical scales. In particular, the implications of new gravitational degrees of freedom for the structure and stability of relativistic compact objects such as neutron stars, the physics of gravitational waves from binary mergers, or the effects of fifth forces on the dynamics of galaxy clusters.
The student will first familiarise with the necessary theoretical tools depending on the particular physical system to be studied, such as the equations governing the dynamics of the astrophysical system and their solution, towards making observable predictions testable with current and future surveys (e.g the LISA gravitational-wave interferometer). A component of this project may investigate the development of novel numerical methods based on machine learning for the analysis of gravitational waves or observations of stars. |
| References |
| [1] LISA Cosmology Working Group (2022) — arXiv: 2203.00566
[2] I.D. Saltas et al (2018) — arXiv: 1812.03969 [3] E. Barausse et al (2020) — arXiv: 2001.09793 [4] L. Pizzuti, I.D. Saltas et al (2021) — arXiv: 2112.12139 |
| Preliminary scope of work in English |
| Various puzzling theoretical and observational hints suggest that General Relativity (GR) is not the ultimate theory of gravity. In particular, the need to explain the problem of dark energy at the current stage of the Universe, or to model the initial conditions of the Big Bang, has given rise to a multitude of extensions of Einstein’s General Relativity. This project can take various broad directions, either theoretical or numerical depending on the student’s inclination. The common theme underlying the project will be the investigation of the consistency and predictions of general theories of gravity at astrophysical scales. |