# Dynamical evolution of dark matter admixed neutron stars

**Authors:** Troy Gleason, Ben Brown, Ben Kain  
**arXiv:** [2201.02274](https://arxiv.org/abs/2201.02274)  
**Date:** 2022-01-06  
**Summary page:** https://www.summarizepaper.com/en/arxiv-id/2201.02274v1/

## Key points

- Study explores dynamical evolution of dark matter admixed neutron stars
- Neutron stars are composed of a mixture of ordinary nuclear matter and dark matter
- Authors derive equations of motion for spherically symmetric systems with multiple fluids
- Utilize finite volume and high-resolution shock-capturing methods for dynamic evolution
- Investigate aspects such as nonlinear stability, oscillation frequencies, and formation process
- Provides insights into the interplay between ordinary nuclear matter and dark matter within neutron stars
- Demonstrates effectiveness of numerical techniques in studying complex systems with multiple fluids
- Expands understanding of neutron stars by considering presence of dark matter
- Opens up new avenues for future research in astrophysics and cosmology

## Summary

The study conducted by Gleason, Brown, and Kain delves into the dynamical evolution of dark matter admixed neutron stars for the first time. These unique astrophysical objects are composed of a mixture of ordinary nuclear matter and dark matter. To analyze their behavior and properties, the authors derive equations of motion in conservation form for spherically symmetric systems with an arbitrary number of perfect fluids. They utilize finite volume and high-resolution shock-capturing methods to dynamically evolve the two-fluid case, where one fluid represents ordinary matter while the other models dark matter. Through their dynamic solutions, they investigate aspects such as nonlinear stability, radial oscillation frequencies, and the formation process. This study provides valuable insights into these enigmatic objects and sheds light on the interplay between ordinary nuclear matter and dark matter within them. It also showcases the effectiveness of numerical techniques in studying complex systems involving multiple fluids. Overall, this work expands our understanding of neutron stars by considering the presence of dark matter and opens up new avenues for future research in astrophysics and cosmology.