## Video URL

https://pirsa.org/24010094# Boson stars through the prism of numerical relativity

### APA

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

### MLA

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

### BibTex

@misc{ scivideos_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 for Theoretical Physics}, year = {2024}, month = {jan}, note = {PIRSA:24010094 see, \url{https://scivideos.org/pirsa/24010094}} }

Tamara Evstafyeva University of Cambridge

**Source Repository**PIRSA

**Collection**

**Talk Type**Scientific Series

## Abstract

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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