57 citations · 99 across the 9 of their papers we have counts for
9 papers
Cosmological inference with halo clustering reconstructed from the redshift-space galaxy distribution
Ryuichiro Hada, Teppei Okumura
Accurate modeling of small-scale redshift-space clustering is crucial for full shape RSD analyses, where satellite galaxies contribute to 1-halo terms and Finger-of-God distortions…
Measurements of quasar proximity zones with the Ly forest of DESI Y1 quasars
Ryuichiro Hada, Paul Martini, David H. Weinberg +41
The intergalactic medium (IGM) around quasars is shaped by their dense environments and by their excess ionizing radiation, forming a "quasar proximity zone" whose size and anisotr…
Prospects for constraining quasar ages with fiber spectrographs: quasar-induced Ly emission from the intergalactic medium
Ryuichiro Hada, Masahiro Takada, Akio K. Inoue
We present a theoretical framework for linking quasar properties, such as quasar age, to the surrounding Ly emission intensity. In particular, we focus on a method for mapping t…
Forecasts for warm dark matter from weakly lensed Type Ia supernovae
Mei Takeda, Ryuichiro Hada, Ken-ichi Oohara +1
We investigate the possibility to have a constraint on the mass of thermal warm dark matter (WDM) particle from the expected data of the Wide Field Infrared Survey Telescope (WFIRS…
Application of the iterative reconstruction to simulated galaxy fields
Ryuichiro Hada, Daniel J. Eisenstein
We apply an iterative reconstruction method to galaxy mocks in redshift space obtained from -body simulations. Comparing the two-point correlation functions for the reconstructe…
Forecasts of cosmological constraints from Type Ia supernovae including the weak-lensing convergence
Ryuichiro Hada, Toshifumi Futamase
We investigate how the cosmological constraints from SNe Ia are improved by including the effects of weak-lensing convergence. To do so, we introduce the lognormal function as the…
An iterative reconstruction of cosmological initial density fields
Ryuichiro Hada, Daniel J. Eisenstein
We present an iterative method to reconstruct the linear-theory initial conditions from the late-time cosmological matter density field, with the intent of improving the recovery o…
Constraints on neutrino masses from the lensing dispersion of Type Ia supernovae
Ryuichiro Hada, Toshifumi Futamase
We investigate how accurately the total mass of neutrinos is constrained from the magnitude dispersion of SNe Ia due to the effects of gravitational lensing. For this purpose, we u…
The magnitude-redshift relation in a realistic inhomogeneous universe
Ryuichiro Hada, Toshifumi Futamase
The light rays from a source are subject to a local inhomogeneous geometry generated by inhomogeneous matter distribution as well as the existence of collapsed objects. In this pap…