Boson stars through the prism of numerical relativity


Evstafyeva, T. (2024). Boson stars through the prism of numerical relativity. Perimeter Institute. https://pirsa.org/24010094


Evstafyeva, Tamara. Boson stars through the prism of numerical relativity. Perimeter Institute, Jan. 25, 2024, https://pirsa.org/24010094


          @misc{ pirsa_PIRSA:24010094,
            doi = {10.48660/24010094},
            url = {https://pirsa.org/24010094},
            author = {Evstafyeva, Tamara},
            keywords = {Strong Gravity},
            language = {en},
            title = {Boson stars through the prism of numerical relativity},
            publisher = {Perimeter Institute},
            year = {2024},
            month = {jan},
            note = {PIRSA:24010094 see, \url{https://pirsa.org}}

Tamara Evstafyeva University of Cambridge

Talk Type Scientific Series


The existence of fermionic compact objects, such as neutron stars, is supported by a plethora of observational evidence — an intriguing idea is whether one can construct stars made up of the bosonic counterparts. Such theoretical objects are called boson stars, proposed to make up a fraction of the dark matter in our Universe and claimed to be promising horizonless black hole mimickers. In this talk I will discuss the state-of-the-art of numerical evolutions of boson star models in spherical symmetry. In particular, I will discuss how improper initial data construction can lead to spurious physical effects in the evolution of boson star mergers and introduce methods, necessary to remedy such spurious features. I will present our results on boson star head-on collisions of various mass ratios, highlighting the differences from the black hole mergers. Lastly, I will discuss our recent results on the high-precision numerical relativity simulations of quasi-circular boson star inspirals in pursuit of understanding the implications of boson star signatures on the LIGO-Virgo-KAGRA observations.


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