27–29 Jul 2022
Europe/Zurich timezone

​Effect of dark matter on observable neutron star's properties and it's discrimination from the strongly interacting matter equation of state

28 Jul 2022, 15:05
25m
Oral presentation Session

Speaker

Violetta Sagun (University of Coimbra)

Description

We study the impact of asymmetric fermionic and bosonic dark matter on neutron star properties,
including tidal deformability, maximum masses, radii, etc. The conditions at which dark matter
particles tend to condensate in the core of the star or create an extended halo are presented. We
show that dark matter condensed in a core leads to a decrease of the total gravitational mass
and tidal deformability compared to a pure baryonic star, which we will perceive as an effective
softening of the equation of state. On the other hand, the presence of a dark matter halo increases
those observable quantities. Thus, observational data on compact stars could be affected by an
accumulated dark matter and, consequently, constraints we put on strongly interacting matter at
high densities. We will discuss how the ongoing and future X-ray, radio and GW observations
could shed light on dark matter admixed compact stars and put multi-messenger constraints on
its effect

Presentation materials