Published in MNRAS, 2024
The excursion set formalism is widely used to model the distribution of dark matter halos, but normally in an approximate form. Here I presented an excursion set formalism without approximations and showed both that the resulting halo distributions are more accurate and that this obviates another widely used extension to the formalism, ellipsoidal collapse.
Published in JCAP, 2023
In this work, I showed that a significant fraction of the initial peaks form prompt cusps that survive up to the present day, and I found that if the dark matter annihilates, these prompt cusps dominate the overall annihilation rate by about an order of magnitude.
Published in MNRAS, 2023
In this work, I showed that prompt cusps persist mostly unaltered at the centers of dark matter halos, thereby establishing their importance to cosmology.
Published in Phys. Rev. D, 2019
This work first established that peaks in the initial density field collapse to form prompt \(\rho\propto r^{-1.5}\) density cusps and that the properties of the peaks directly determine the properties of the cusps.