Erlangen 2026 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

GR: Fachverband Gravitation, Relativistische Astrophysik und Kosmologie

GR 14: Relativistic Astrophysics IV

GR 14.1: Vortrag

Donnerstag, 19. März 2026, 16:15–16:30, KH 01.016

Neutron stars under the influence of dark matter — •Sarah Louisa Pitz and Jürgen Schaffner-Bielich — Max-von-Laue-Str. 1 60438 Frankfurt am Main

Neutron stars represent ideal laboratories to test different kinds of matter under the influence of strong gravity and high magnetic fields. Due to their age and their strong gravitational field neutron stars could capture dark matter particles and thus serve indirectly as dark matter detectors. We include bosonic, self-interacting dark matter with a sufficiently stiff self-interaction potential in the form of V ∝ φⁿ and find that these neutron stars become ultra-compact. They are compact enough to have a stable photon orbit at their surface or even above, a property that is otherwise exclusively attributed to black holes or hypothetical boson stars. These ultra-compact neutron stars could be formed by a boson star accreting ordinary matter. We will present results on how a high compactness of the boson star affects the accretion rate and thus the mass of the resulting neutron star.

This work is supported by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through the CRC-TR 211 Strong-interaction matter under extreme conditions project number 315477589 TRR 211.

Keywords: Neutron stars; Dark matter; Equation of state; Boson stars