273 citations · 1.4k across the 54 of their papers we have counts for
9 papers · 1 filter
Modeling the core-halo mass relation in fuzzy dark matter halos
Hiroki Kawai, Ayuki Kamada, Kohei Kamada +1
Fuzzy dark matter (FDM) is an intriguing candidate alternative to the standard cold dark matter (CDM). The FDM model predicts that dark halos have characteristic core structures ge…
Evolution of Resonant Self-interacting Dark Matter Halos
Ayuki Kamada, Hee Jung Kim
Recent analysis on the stellar kinematics of ultra-faint dwarf (UFD) galaxies has put a stringent upper limit on the self-scattering cross section of dark matter, i.e., $σ/m<{\cal…
Fingerprint matching of beyond-WIMP dark matter: neural network approach
Kyu Jung Bae, Ryusuke Jinno, Ayuki Kamada +1
Galactic-scale structure is of particular interest since it provides important clues to dark matter properties and its observation is improving. Weakly interacting massive particle…
Reannihilation of self-interacting dark matter
Tobias Binder, Michael Gustafsson, Ayuki Kamada +2
We explore the phenomenology of having a second epoch of dark matter annihilation into dark radiation long after the standard thermal freeze-out. Such a hidden reannihilation proce…
Dark matter kinetic decoupling with a light particle
Ayuki Kamada, Tomo Takahashi
We argue that the acoustic damping of the matter power spectrum is not a generic feature of the kinetic decoupling of dark matter, but even the enhancement can be realized dependin…
Constraints on mixed dark matter from anomalous strong lens systems
Ayuki Kamada, Kaiki Taro Inoue, Tomo Takahashi
Recently it has been claimed that the warm dark matter (WDM) model cannot at the same time reproduce the observed Lyman-α forests in distant quasar spectra and solve the small-scal…
Effects of electrically charged dark matter on cosmic microwave background anisotropies
Ayuki Kamada, Kazunori Kohri, Tomo Takahashi +1
We examine the possibility that dark matter consists of charged massive particles (CHAMPs) in view of the cosmic microwave background (CMB) anisotropies. The evolution of cosmologi…
Cosmological Constraint on the Light Gravitino Mass from CMB Lensing and Cosmic Shear
Ken Osato, Toyokazu Sekiguchi, Masato Shirasaki +2
Light gravitinos of mass eV are of particular interest in cosmology, offering various baryogenesis scenarios without suffering from the cosmological gra…
Structure formation in a mixed dark matter model with decaying sterile neutrino: the 3.5 keV X-ray line and the Galactic substructure
Akira Harada, Ayuki Kamada
We perform a set of cosmological simulations of structure formation in a mixed dark matter (MDM) model. Our model is motivated by the recently identified X-ray lin…