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Noise reduction for weak lensing mass mapping: An application of generative adversarial networks to Subaru Hyper Suprime-Cam first-year data
Masato Shirasaki, Kana Moriwaki, Taira Oogi +3
We propose a deep-learning approach based on generative adversarial networks (GANs) to reduce noise in weak lensing mass maps under realistic conditions. We apply image-to-image tr…
Cross Correlation of the Extragalactic Gamma-ray Background with Thermal Sunyaev-Zel'dovich Effect in the Cosmic Microwave Background
Masato Shirasaki, Oscar Macias, Shin'ichiro Ando +2
Cosmic rays in galaxy clusters are unique probes of energetic processes operating with large-scale structures in the Universe. Precise measurements of cosmic rays in galaxy cluster…
Fitting the nonlinear matter bispectrum by the Halofit approach
Ryuichi Takahashi, Takahiro Nishimichi, Toshiya Namikawa +5
We provide a new fitting formula of the matter bispectrum in the nonlinear regime calibrated by high-resolution cosmological -body simulations of cold dark matter (CDM,…
Probing Cosmology and Cluster Astrophysics with Multi-Wavelength Surveys I. Correlation Statistics
Masato Shirasaki, Erwin T. Lau, Daisuke Nagai
Upcoming multi-wavelength astronomical surveys will soon discover all massive galaxy clusters and provide unprecedented constraints on cosmology and cluster astrophysics. In this p…
Cross-correlation of the thermal Sunyaev-Zel'dovich effect and weak gravitational lensing: Planck and Subaru Hyper Suprime-Cam first-year data
Ken Osato, Masato Shirasaki, Hironao Miyatake +4
Cross-correlation analysis of the thermal Sunyaev-Zel'dovich (tSZ) effect and weak gravitational lensing (WL) provides a powerful probe of cosmology and astrophysics of the intra-c…
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…
Cosmological constraints from cosmic shear two-point correlation functions with HSC survey first-year data
T. Hamana, M. Shirasaki, S. Miyazaki +17
We present measurements of cosmic shear two-point correlation functions (TPCFs) from Hyper Suprime-Cam Subaru Strategic Program (HSC SSP) first-year data, and derived cosmological…
Weak Lensing Measurement of Filamentary Structure with the SDSS BOSS and Subaru Hyper Suprime-Cam Data
Hiroto Kondo, Hironao Miyatake, Masato Shirasaki +2
We report the weak lensing measurement of filaments between Sloan Digital Sky Survey (SDSS) III/Baryon Oscillation Spectroscopic Survey (BOSS) CMASS galaxy pairs at , us…
The Pseudo Evolution of Galaxy-Cluster Masses and Its Connection to Mass Density Profile
Masato Shirasaki
A mass of dark matter halo is commonly defined as the spherical over-density (SO) mass with respect to a reference density, whereas the time evolution of an SO mass can be affected…
WFIRST: The Essential Cosmology Space Observatory for the Coming Decade
O. Doré, C. Hirata, Y. Wang +46
Two decades after its discovery, cosmic acceleration remains the most profound mystery in cosmology and arguably in all of physics. Either the Universe is dominated by a form of da…
The mass-richness relation of optically-selected clusters from weak gravitational lensing and abundance with Subaru HSC first-year data
Ryoma Murata, Masamune Oguri, Takahiro Nishimichi +6
Constraining the relation between the richness and the halo mass over a wide redshift range for optically-selected clusters is a key ingredient for cluster-related science…
Mock galaxy shape catalogs in the Subaru Hyper Suprime-Cam Survey
Masato Shirasaki, Takashi Hamana, Masahiro Takada +2
We use the full-sky ray-tracing weak lensing simulations to generate 2268 mock catalogues for the Subaru Hyper Suprime-Cam (HSC) survey first-year shear catalogue. Our mock catalog…