Speaker
Description
Author and Presenter: Stephan Meighen-Berger
Abstract: In this talk, we present novel indirect-detection methods for constraining dark matter (DM) interactions using astrophysical bodies beyond traditional solar and terrestrial targets. First, we explore the potential of nearby white dwarfs (WDs) as probes of DM-nucleon interactions. By analyzing a sample of ten cold, isolated WDs within 13 pc and modeling their interiors, we estimate DM capture rates and derive constraints for DM annihilating via long-lived mediators. While current Fermi-LAT data reveals no excess, future gamma-ray telescopes such as CTA, LHAASO, and SWGO could reach cross-section sensitivities competitive with direct detection experiments like LZ. We also discuss the potential role of neutrino observatories and telescopes.
Second, we demonstrate that Jupiter's deep gravitational well and relatively cool core make it an efficient capture target for sub-GeV DM, particularly below the solar evaporation mass (~4 GeV). Using current and future water Cherenkov neutrino detectors, we derive the first constraints on DM annihilation in Jupiter. We find improved sensitivity over solar-based and direct detection approaches in this low-mass regime.
Together, these approaches underscore the growing importance of planetary and stellar astrophysics in the search for DM across a broad mass range.
