The 5th workshop on Symmetry and Structure of the Universe (SSU 2026 Busan)

Session

S2

24 Aug 2026, 13:30

Conveners

S2

• Jae Hyeok Chang (Seoul National University)

7. Reconstructing the Dark Matter Equation of State with Compact Object Inspirals

Boris Betancourt Kamenetskaia (Institute for Basic Science CTPU-CGA)

24/08/2026, 13:30

Can gravitational waves reveal the properties of dark matter? Compact binaries embedded in extended dark matter configurations provide a unique opportunity to probe the macroscopic behavior of the dark sector. If a neutron star or black hole is surrounded by a sufficiently massive and extended dark matter envelope, an inspiraling companion experiences dynamical friction in addition to the...

31. A Natural Dark Matter–Dark Energy Interaction from Axion–Monopole Dynamics

Huangyu Xiao

24/08/2026, 14:10

We propose a natural framework for interacting dark matter and dark energy based on axion–monopole dynamics in a dark gauge sector. Dark matter is composed of dark ’t Hooft–Polyakov monopoles, while dark energy is an ultralight axion whose coupling to the dark gauge field induces an axion-dependent dyon mass through the Witten effect. This generates a direct dark matter–dark energy...