104 citations · 1.1k across the 42 of their papers we have counts for
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The Diversity of Core Halo Structure in the Fuzzy Dark Matter Model
Hei Yin Jowett Chan, Elisa G. M. Ferreira, Simon May +2
In the fuzzy dark matter (FDM) model, gravitationally collapsed objects always consist of a solitonic core located within a virialised halo. Although various numerical simulations…
Constraining Self-Interacting Dark Matter with Dwarf Spheroidal Galaxies and High-resolution Cosmological -body Simulations
Toshihiro Ebisu, Tomoaki Ishiyama, Kohei Hayashi
We study the density structures of dark matter subhalos for both cold dark matter and self-interacting dark matter models using high-resolution cosmological -body simulations. W…
An Arecibo 327 MHz Search for Radio Pulsars and Bursts in the Dwarf Irregular Galaxies Leo A and T
Fronefield Crawford, Kohei Hayashi
We have conducted an Arecibo 327 MHz search of two dwarf irregular galaxies in the Local Group, Leo A and T, for radio pulsars and single pulses from fast radio bursts and other gi…
A one-phase Stefan problem with non-linear diffusion from highly competing two-species particle systems
Kohei Hayashi
We consider an interacting particle system with two species under strong competition dynamics between the two species. Then, through the hydrodynamic limit procedure for the micros…
Interstellar Gas Heating by Primordial Black Holes
Volodymyr Takhistov, Philip Lu, Graciela B. Gelmini +3
Interstellar gas heating is a powerful cosmology-independent observable for exploring the parameter space of primordial black holes (PBHs) formed in the early Universe that could c…
Narrowing the mass range of Fuzzy Dark Matter with Ultra-faint Dwarfs
Kohei Hayashi, Elisa G. M. Ferreira, Hei Yin Jowett Chan
Fuzzy dark matter (FDM) is an attractive dark matter candidate motivated by small scale problems in astrophysics and with a rich phenomenology on those scales. We scrutinize the FD…