5 papers · 1 filter
Constraining Dark matter annihilation with Dark Energy Survey Y3 LSBG sample
Daiki Hashimoto, Atsushi J. Nishizawa, Masahiro Takada
To reveal natures of the dark matter (DM) particles, a gamma-ray signal produced in annihilation processes of DM into the standard model particles has been one of the major probes.…
Dark matter constraints with stacked gamma rays scales with the number of galaxies
Daiki Hashimoto, Atsushi J. Nishizawa, Masahiro Takada +1
Low-surface-brightness galaxies (LSBGs) are interesting targets for searches of dark matter emission due to their low baryonic content. However, predicting their expected dark matt…
The 21-cm signals from ultracompact minihalos as a probe of primordial small-scale fluctuations
Kunihiko Furugori, Katsuya Abe, Toshiyuki Tanaka +3
Ultracompact minihalos~(UCMHs) can form after the epoch of matter-radiation equality, if the density fluctuations of dark matter have significantly large amplitude on small scales.…
Constraining dark matter annihilation with HSC Low Surface Brightness Galaxies
Daiki Hashimoto, Oscar Macias, Atsushi J. Nishizawa +4
Searches for dark matter annihilation signals have been carried out in a number of target regions such as the Galactic Center and Milky Way dwarf spheroidal galaxies (dSphs), among…
Measurement of redshift dependent cross correlation of HSC clusters and Fermi rays
Daiki Hashimoto, Atsushi J. Nishizawa, Masato Shirasaki +4
The cross-correlation study of the unresolved -ray background (UGRB) with galaxy clusters has a potential to reveal the nature of the UGRB. In this paper, we perform a cross-cor…