22–26 Jul 2024
Europe/Lisbon timezone

Numerical Relativity Simulations of Dark Matter Admixed Neutron Star Mergers: Unveiling Effects on Gravitational Waves and Ejecta

23 Jul 2024, 14:45
15m
Auditorium E10A

Auditorium E10A

Department of Physics (University of Coimbra)

Speaker

Edoardo Giangrandi (University of Coimbra, University of Potsdam)

Description

We present a novel study of the impact of asymmetric dark matter (DM) on the dynamics of binary neutron star (BNS) mergers and the associated gravitational wave (GW) signatures. Utilizing numerical relativity simulations with a recently developed framework for DM admixed BNS, we analyze not only the emitted GW signal but also the dynamical behavior of the ejected material (ejecta) during and after the merger for different particle's mass and fraction of DM. This comprehensive approach allows us to explore how the presence of DM affects the post-merger remnant's fate, potentially altering its collapse into a black hole or remaining as a massive neutron star. We focus on deviations in the GW signal and the ejecta properties compared to standard BNS mergers. This study aims to establish a connection between DM properties and the combined GW and ejecta signatures, offering a powerful tool for constraining the DM nature through future multi-messenger observations of BNS mergers.

Author

Edoardo Giangrandi (University of Coimbra, University of Potsdam)

Co-authors

Ananya Adhikari Constança Providência Dr Hannes Rüter (CENTRA, Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa) Mattia Emma (Royal Holloway University of London) Ms Nina Kunert Prof. TIm Dietrich (University of Potsdam) Dr Violetta Sagun (University of Coimbra) Wolfgang Tichy

Presentation materials