# Dynamical evolution of fermion-boson stars

**Authors:** Susana Valdez-Alvarado, Carlos Palenzuela, Daniela Alic, L. Arturo Ureña-López  
**arXiv:** [1210.2299](https://arxiv.org/abs/1210.2299)  
**Date:** 2012-10-08  
**Summary page:** https://www.summarizepaper.com/en/paper/1210.2299v1/

## Key points

- Study focuses on compact objects like neutron stars and white dwarfs as probes for dark matter
- Researchers use perfect fluid coupled to a complex scalar field to model compact stars with dark matter
- Models known as fermion-boson stars
- Objective is to analyze stability and investigate spectrum of normal modes
- Dynamical evolution simulations used to examine equilibrium configurations and determine stability
- Fermion-boson stars have similar structures to isolated fermion or boson stars
- New oscillation modes discovered in fermionic part due to coupling with bosonic component through gravity
- Study contributes to understanding of compact objects with dark matter component and their stability and behavior
- Normal modes provide insights into presence and properties of dark matter within these systems

## Summary

The study focuses on compact objects such as neutron stars and white dwarfs that can accrete dark matter and serve as sensitive probes for its presence. To model these compact stars with a dark matter component, researchers use a perfect fluid minimally coupled to a complex scalar field representing bosonic dark matter. These models are known as fermion-boson stars. The main objective is to analyze the stability of these stars and investigate their spectrum of normal modes, providing insights into the amount of dark matter present. Through dynamical evolution simulations, the team examines various equilibrium configurations and determines their stability. The analysis reveals that fermion-boson stars have similar structures to isolated fermion or boson stars. Additionally, new oscillation modes in the fermionic part are discovered due to its coupling with the bosonic component through gravity. This study contributes to our understanding of compact objects with a dark matter component and sheds light on their stability and behavior. By studying their normal modes, scientists can gain further knowledge about the presence and properties of dark matter within these systems.