output
20052026
most citedHyperon mixing and universal many-body repulsion in neutron stars

169 citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions
Showing astro-ph.COShow all

8 papers · 1 filter

astro-ph.CO2022★ 104 cited

EMPRESS. VIII. A New Determination of Primordial He Abundance with Extremely Metal-Poor Galaxies: A Suggestion of the Lepton Asymmetry and Implications for the Hubble Tension

Akinori Matsumoto, Masami Ouchi, Kimihiko Nakajima +42

The primordial He abundance is a powerful probe of cosmology. Currently, is best determined by observations of metal-poor galaxies, while there are on…

astro-ph.CO2021★ 1 cited

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…

astro-ph.CO2021★ 74 cited

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…

astro-ph.CO2011★ 15 cited

Constraining Galileon gravity from observational data with growth rate

Koichi Hirano, Zen Komiya, Hisato Shirai

We studied the cosmological constraints on the Galileon gravity obtained from observational data of the growth rate of matter density perturbations, the supernovae Ia (SN Ia), the…

astro-ph.CO2011★ 6 cited

Observational tests of Galileon gravity with growth rate

Koichi Hirano, Zen Komiya

We compare observational data of growth rate with the prediction by Galileon theory. For the same value of the energy density parameter , the growth rate in Galileon model…

astro-ph.CO2010★ 12 cited

Observational tests for oscillating expansion rate of the Universe

Koichi Hirano, Zen Komiya

We investigate the observational constraints on the oscillating scalar field model using data from type Ia supernovae, cosmic microwave background anisotropies, and baryon acoustic…

astro-ph.CO2010★ 4 cited

Observational Constraints on Phantom Crossing DGP Gravity

Koichi Hirano, Zen Komiya

We study the observational constraints on the Phantom Crossing DGP model. We demonstrate that the crossing of the phantom divide does not occur within the framework of the original…

astro-ph.CO2009★ 11 cited

Crossing the Phantom Divide in Extended Dvali-Gabadadze-Porrati Gravity

Koichi Hirano, Zen Komiya

We propose a phantom crossing Dvali--Gabadadze--Porrati (DGP) model. In our model, the effective equation of state of the DGP gravity crosses the phantom divide line. We demonstrat…