Floating Dark Matter in Celestial Bodies

Rebecca K. Leane and Juri Smirnov

Submitted on 20 September 2022


Dark matter (DM) can be captured in celestial bodies after scattering and losing sufficient energy to become gravitationally bound. We derive a general framework that describes the current DM distribution inside celestial objects, which self-consistently includes the effects of concentration diffusion, thermal diffusion, gravity, and capture accumulation. For DM with sufficient interactions, we show that a significant DM population can thermalize and sit towards the celestial-body surface. This floating distribution allows for new phenomenology for DM searches in a wide range of celestial bodies, including the Sun, Earth, Jupiter, Brown Dwarfs, and Exoplanets.


Comment: 20 pages, 6 figures, 100000000000000+ dark matter particles per cm^3 at Earth's surface

Subjects: High Energy Physics - Phenomenology; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - High Energy Astrophysical Phenomena