activity
19932023
most citedThe End of the Reionization Epoch Probed by Ly-alpha Emitters at z=6.5 in the Subaru Deep Field

409 citations · 5.9k across the 98 of their papers we have counts for

collaborators

98 papers

astro-ph.GA2023★ 5 cited

Generation of high circular polarization of interstellar Lyman radiation triggering biological homochirality

Hajime Fukushima, Hidenobu Yajima, Masayuki Umemura

The homochirality of biological molecules on the Earth is a long-standing mystery regarding the origin of life. Circularly polarized ultraviolet (UV) light could induce the enantio…

astro-ph.GA2023★ 8 cited

EMPRESS. XII. Statistics on the Dynamics and Gas Mass Fraction of Extremely-Metal Poor Galaxies

Yi Xu, Masami Ouchi, Yuki Isobe +49

We present demography of the dynamics and gas-mass fraction of 33 extremely metal-poor galaxies (EMPGs) with metallicities of and low stellar masses of $10^4-…

astro-ph.HE2022★ 4 cited

3D Photon Conserving Code for Time-dependent General Relativistic Radiative Transfer : CARTOON

Mikiya M. Takahashi, Ken Ohsuga, Rohta Takahashi +3

We develop the 3-dimensional general relativistic radiative transfer code: CARTOON (Calculation code of Authentic Radiative Transfer based On phOton Number conservation in curved s…

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…

physics.med-ph2021★ 11 cited

TRINITY: a three-dimensional time-dependent radiative transfer code for in-vivo near-infrared imaging

Hidenobu Yajima, Makito Abe, Masayuki Umemura +2

We develop a new three-dimensional time-dependent radiative transfer code, TRINITY (Time-dependent Radiative transfer In Near-Infrared TomographY), for in-vivo diffuse optical tomo…

physics.med-ph2020★ 2 cited

Deep Learning of Diffuse Optical Tomography based on Time-Domain Radiative Transfer Equation

Yu-ichi Takamizu, Masayuki Umemura, Hidenobu Yajima +2

Near infrared diffuse optical tomography (DOT) provides an imaging modality for the oxygenation of tissue. In this paper, we propose a novel machine learning algorithm based on tim…