Dec 11 – 15, 2023
Tsung-Dao Lee Institute
Asia/Shanghai timezone

Relativistic Bondi Accretion and the BEC Dark Matter Spike

Dec 12, 2023, 4:50 PM
15m
Hall # 1

Hall # 1

Contributed talk in mini symposium Dark Matter

Speaker

Wei-Xiang Feng

Description

We consider the spike mass density profile in a dark halo by self-consistently solving the relativistic Bondi accretion of dark matter onto a non-spinning black hole. We assume that the dark matter in the halo forming a Bose-Einstein condensate (BEC) is described by a self-interacting scalar field. In the hydrodynamic limit, we find that the accretion rate has a lower bound. The spike density profile can be solved piecewise, and the power-law index of the profile is less cuspy compared to the density profiles of dark matter models with Coulomb-like self-interaction.

Primary author

Presentation materials