258 citations · 835 across the 19 of their papers we have counts for
17 papers · 1 filter
High-resolution cosmological simulations of primordial dark matter clustering under long-range and fractional forces
Derek Inman
Long-range attractive fifth forces can lead to exponential instabilities in the early Universe. For fermions with a Yukawa coupling to a sufficiently light scalar mediator, rapid o…
Halo Formation from Yukawa Forces in the Very Early Universe
Guillem Domènech, Derek Inman, Alexander Kusenko +1
If long-range attractive forces exist and are stronger than gravity then cosmic halo formation can begin in the radiation-dominated era. We study a simple realization of this effec…
Robust field-level inference with dark matter halos
Helen Shao, Francisco Villaescusa-Navarro, Pablo Villanueva-Domingo +13
We train graph neural networks on halo catalogues from Gadget N-body simulations to perform field-level likelihood-free inference of cosmological parameters. The catalogues contain…
Enhanced Small-Scale Structure in the Cosmic Dark Ages
Derek Inman, Kazunori Kohri
We consider the consequences of a matter power spectrum which rises on small scales until eventually being cutoff by microphysical processes associated with the particle nature of…
Simulating the Cosmic Neutrino Background using Collisionless Hydrodynamics
Derek Inman, Hao-ran Yu
The cosmic neutrino background is an important component of the Universe that is difficult to include in cosmological simulations due to the extremely large velocity dispersion of…
Cosmic microwave background bounds on primordial black holes including dark matter halo accretion
Pasquale D. Serpico, Vivian Poulin, Derek Inman +1
Even if massive () primordial black holes (PBHs) can only account for a small fraction of the dark matter (DM) in the universe, they m…
On the road to percent accuracy III: non-linear reaction of the matter power spectrum to massive neutrinos
Matteo Cataneo, J. D. Emberson, Derek Inman +2
We analytically model the non-linear effects induced by massive neutrinos on the total matter power spectrum using the halo model reaction framework of Cataneo et al. 2019. In this…
Early Structure Formation in PBH Cosmologies
Derek Inman, Yacine Ali-Haïmoud
Cold dark matter (CDM) could be composed of primordial black holes (PBH) in addition to or instead of more orthodox weakly interacting massive particle dark matter (PDM). We study…
Dipole Distortions in the Intergalactic Medium
Derek Inman, Ue-Li Pen, Francisco Villaescusa-Navarro
Baryonic feedback can significantly modify the spatial distribution of matter on small scales and create a bulk relative velocity between the dominant cold dark matter and the hot…
Increasing Fisher Information by Moving-Mesh Reconstruction
Qiaoyin Pan, Ue-Li Pen, Derek Inman +1
Reconstruction techniques are commonly used in cosmology to reduce complicated nonlinear behaviours to a more tractable linearized system. We study a new reconstruction technique t…
Cosmological neutrino simulations at extreme scale
J. D. Emberson, Hao-Ran Yu, Derek Inman +8
Constraining neutrino mass remains an elusive challenge in modern physics. Precision measurements are expected from several upcoming cosmological probes of large-scale structure. A…
Measurement of the Cold Dark Matter-Neutrino Dipole in the TianNu Simulation
Derek Inman, Hao-Ran Yu, Hong-Ming Zhu +6
Measurements of neutrino mass in cosmological observations rely on two point statistics that are hindered by significant degeneracies with the optical depth and galaxy bias. The re…
Cosmic neutrinos: dispersive and non-linear
Derek Inman, Ue-Li Pen
We present a description of cosmic neutrinos as a dispersive fluid. In this approach, the neutrino phase space is reduced to density and velocity fields alongside a scale-dependent…
Differential Neutrino Condensation onto Cosmic Structure
Hao-Ran Yu, J. D. Emberson, Derek Inman +12
Astrophysical techniques have pioneered the discovery of neutrino mass properties. Current cosmological observations give an upper bound on neutrino masses by attempting to disenta…
Precision reconstruction of the dark matter-neutrino relative velocity from N-body simulations
Derek Inman, J. D. Emberson, Ue-Li Pen +3
Discovering the mass of neutrinos is a principle goal in high energy physics and cosmology. In addition to cosmological measurements based on two-point statistics, the neutrino mas…
Probing Neutrino Hierarchy and Chirality via Wakes
Hong-Ming Zhu, Ue-Li Pen, Xuelei Chen +1
The relic neutrinos are expected to acquire a bulk relative velocity with respect to the dark matter at low redshifts, and neutrino wakes are expected to develop downstream of the…
Measurement of Neutrino Masses from Relative Velocities
Hong-Ming Zhu, Ue-Li Pen, Xuelei Chen +2
We present a new technique to measure neutrino masses using their flow field relative to dark matter. Present day streaming motions of neutrinos relative to dark matter and baryons…