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May 3 – 5, 2023
Center for Astrophysics and Gravitation, Instituto Superior Técnico, University of Lisbon
Europe/Lisbon timezone

Mergers of Dark Matter Admixed Neutron Stars

May 4, 2023, 4:00 PM
15m
Centro de Congressos (Center for Astrophysics and Gravitation, Instituto Superior Técnico, University of Lisbon)

Centro de Congressos

Center for Astrophysics and Gravitation, Instituto Superior Técnico, University of Lisbon

Av. Rovisco Pais 1 1049-001 Lisboa, PORTUGAL

Speaker

Dr Hannes Rüter (CENTRA, Departamento de Física, Instituto Superior Técnico IST)

Description

We investigate mergers of neutron stars consisting of two non-interacting fluids minimally coupled to the gravitational field using the numerical relativity code BAM. The first fluid represents baryonic matter, whereas the second fluid models dark matter, which we describe using the equation of state of a degenerate Fermi gas.

We consider two different scenarios for the distribution of the dark matter. In the first scenario the dark matter is confined to the core of the star, whereas in the second scenario the dark matter extends beyond the surface of the baryonic matter forming a halo around the baryonic star.

We show how the dark matter impacts the binary dynamics and merger waveforms.

Primary authors

Dr Hannes Rüter (CENTRA, Departamento de Física, Instituto Superior Técnico IST) Mattia Emma (Royal Holloway University of London) Dr Violetta Sagun (University of Coimbra) Tim Dietrich (Nikhef) Dr Wolfgang Tichy (Department of Physics, Florida Atlantic University)

Presentation materials