The precise measurement of cosmic antinuclei is an important means for identifying the nature of dark matter and other beyond-standard-model physics. Recent years have shown that identifying the nature of dark matter with cosmic positrons and antiprotons is challenging and has led to an increased interest in cosmic antideuteron and antihelium searches. Antideuterons and antihelium nuclei may...
I will discuss our recent analysis of the LIGO GW catalogue that suggests two separate, unmixed, BH populations, potentially with different spatial distributions or origins. I will also discuss suggestive results from a recent analysis of microlensing towards the galactic bulge.
In this talk, I present the first results from a new suite of Feedback in Realistic Environments (FIRE) simulations in which the dark matter is subject to a long-range self-interaction. This self-interaction takes the form of an attractive Yukawa potential parametrized by the strength of the force and its screening length, which we simulate on kiloparsec to megaparsec scales. We simulate...
Primordial black holes (PBHs) in the mass range $10^{17} - 10^{22} \, \text{g}$ are a promising candidate for the dark matter. At the lower end of this range, PBHs emit Hawking radiation with temperatures $T_H \gtrsim 100 \, \text{keV}$, allowing for electron-positron pair production and making their radiation detectable in high-energy surveys. To interpret these signals, it is crucial to...
