Ken Osato

Profile Information

Affiliation: Assistant Professor, Center for Frontier Science, Chiba University
: (Concurrent)Assistant Professor, Department of Physics, Graduate School of Science

Degree: Doctor of Philosophy(Mar, 2019, The University of Tokyo)
Master of Science(Mar, 2016, The University of Tokyo)

Researcher number: 00914277
ORCID iD: https://orcid.org/0000-0002-7934-2569
J-GLOBAL ID: 202101012137702608
researchmap Member ID: R000025251

Research Interests

Major Research Areas

Natural sciences / Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics /

Research History

Apr, 2023 - Present

Assistant Professor, Center for Frontier Science, Chiba University
Jun, 2022 - Mar, 2023

Specially Appointed Assistant Professor, Center for Frontier Science, Chiba University
Apr, 2021 - Jun, 2022

JSPS Research Fellow (Research Assistant Professor), Yukawa Institute for Theoretical Physics, Kyoto University
Apr, 2019 - Mar, 2021

JSPS Overseas Research Fellow, Institut d'Astrophysique de Paris, Centre national de la recherche scientifique
Apr, 2016 - Mar, 2019

JSPS Research Fellow for Young Scientists, Graduate School of Science, The University of Tokyo

Education

Apr, 2014 - Mar, 2019

Department of Physics, Graduate School of Science, The University of Tokyo
Apr, 2010 - Mar, 2014

Department of Physics, Faculty of Science, The University of Tokyo

Awards

Mar, 2016

The Research Award of Faculty of Science, The University of Tokyo

Ken Osato

Papers

Baryon Pasting the Uchuu Light-cone Simulation

Erwin T. Lau, Daisuke Nagai, Arya Farahi, Tomoaki Ishiyama, Hironao Miyatake, Ken Osato, Masato Shirasaki

Astrophys.J., 980(1) 122-122, Feb 7, 2025
Perturbation theory remixed. II. Improved modeling of nonlinear bispectrum

Zhenyuan Wang, Donghui Jeong, Atsushi Taruya, Takahiro Nishimichi, Ken Osato

Phys.Rev.D, 110(10) 103548-103548, Nov 15, 2024
Euclid. I. Overview of the Euclid mission

Mellier, Y., Javier A. Acevedo Barroso, Achúcarro, A., Julian Adamek, Rémi Adam, Graeme Addison, Nabila Aghanim, Aguena, M., Virginia Ajani, Yashar Akrami …

May, 2024
Cosmology from weak lensing peaks and minima with Subaru Hyper Suprime-Cam Survey first-year data

Gabriela A Marques, Jia Liu, Masato Shirasaki, Leander Thiele, Daniela Grandón, Kevin M Huffenberger, Sihao Cheng, Joachim Harnois-Déraps, Ken Osato, William R Coulton

Monthly Notices of the Royal Astronomical Society, 528(3) 4513-4527, Jan 10, 2024
Line-of-sight structure of troughs identified in Subaru Hyper Suprime-Cam Year 3 weak lensing mass maps

Takumi Shimasue, Ken Osato, Masamune Oguri, Rhythm Shimakawa, Atsushi J. Nishizawa

Monthly Notices of the Royal Astronomical Society, 527(3) 5974-5987, Jan 1, 2024
Perturbation theory challenge for cosmological parameters estimation. II. Matter power spectrum in redshift space

Ken Osato, Nishimichi, Takahiro, Atsushi Taruya, Bernardeau, Francis

Phys.Rev.D, 108(12) 123541-123541, Dec 15, 2023
Hyper Suprime-Cam Year 3 results: Cosmology from galaxy clustering and weak lensing with HSC and SDSS using the emulator based halo model

Hironao Miyatake, Sunao Sugiyama, Masahiro Takada, Takahiro Nishimichi, Xiangchong Li, Masato Shirasaki, Surhud More, Yosuke Kobayashi, Atsushi J. Nishizawa, Markus M. Rau …

Physical Review D, 108(12), Dec 15, 2023
Hyper Suprime-Cam Year 3 results: Cosmology from cosmic shear power spectra

Roohi Dalal, Xiangchong Li, Andrina Nicola, Joe Zuntz, Michael A. Strauss, Sunao Sugiyama, Tianqing Zhang, Markus M. Rau, Rachel Mandelbaum, Masahiro Takada …

Physical Review D, 108(12), Dec 15, 2023
Hyper Suprime-Cam Year 3 results: Cosmology from cosmic shear two-point correlation functions

Xiangchong Li, Tianqing Zhang, Sunao Sugiyama, Roohi Dalal, Ryo Terasawa, Markus M. Rau, Rachel Mandelbaum, Masahiro Takada, Surhud More, Michael A. Strauss …

Physical Review D, 108(12), Dec 15, 2023
Hyper Suprime-Cam Year 3 results: Cosmology from galaxy clustering and weak lensing with HSC and SDSS using the minimal bias model

Sunao Sugiyama, Hironao Miyatake, Surhud More, Xiangchong Li, Masato Shirasaki, Masahiro Takada, Yosuke Kobayashi, Ryuichi Takahashi, Takahiro Nishimichi, Atsushi J. Nishizawa …

Physical Review D, 108(12), Dec 15, 2023
Hyper Suprime-Cam Year 3 results: Measurements of clustering of SDSS-BOSS galaxies, galaxy-galaxy lensing, and cosmic shear

Surhud More, Sunao Sugiyama, Hironao Miyatake, Markus Michael Rau, Masato Shirasaki, Xiangchong Li, Atsushi J. Nishizawa, Ken Osato, Tianqing Zhang, Masahiro Takada …

Physical Review D, 108(12), Dec 15, 2023
Probabilistic mass-mapping with neural score estimation

B. Remy, F. Lanusse, N. Jeffrey, J. Liu, J.-L. Starck, K. Osato, T. Schrabback

Astronomy & Astrophysics, 672 A51-A51, Mar 27, 2023
Baryon pasting algorithm: halo-based and particle-based pasting methods

Ken Osato, Daisuke Nagai

Monthly Notices of the Royal Astronomical Society, 519(2) 2069-2082, Dec 16, 2022
Clustering of emission line galaxies with IllustrisTNG – I. Fundamental properties and halo occupation distribution

Ken Osato, Teppei Okumura

Monthly Notices of the Royal Astronomical Society, 519(2) 1771-1791, Dec 9, 2022
Comparing weak lensing peak counts in baryonic correction models to hydrodynamical simulations

Max E Lee, Tianhuan Lu, Zoltán Haiman, Jia Liu, Ken Osato

Monthly Notices of the Royal Astronomical Society, 519(1) 573-584, Dec 8, 2022
Super DIOS Project for Exploring “Dark Baryon”

K. Sato, N. Y. Yamasaki, M. Ishida, Y. Maeda, K. Mitsuda, Y. Ishisaki, Y. Fujita, Y. Ezoe, I. Mitsuishi, Y. Tawara …

Journal of Low Temperature Physics, 209(5-6) 971-979, Dec, 2022
Cosmological inference from an emulator based halo model. I. Validation tests with HSC and SDSS mock catalogs

Hironao Miyatake, Yosuke Kobayashi, Masahiro Takada, Takahiro Nishimichi, Masato Shirasaki, Sunao Sugiyama, Ryuichi Takahashi, Ken Osato, Surhud More, Youngsoo Park

Physical Review D, 106(8), Oct 21, 2022
Cosmological inference from an emulator based halo model. II. Joint analysis of galaxy-galaxy weak lensing and galaxy clustering from HSC-Y1 and SDSS

Hironao Miyatake, Sunao Sugiyama, Masahiro Takada, Takahiro Nishimichi, Masato Shirasaki, Yosuke Kobayashi, Rachel Mandelbaum, Surhud More, Masamune Oguri, Ken Osato …

Physical Review D, 106(8), Oct 15, 2022
Super DIOS for exploring dark baryon

Kosuke Sato, Noriko Y. Yamasaki, Shinya Yamada, Ikuyuki Mitsuishi, Yuto Ichinohe, Hajime Omamiuda, Yuusuke Uchida, Kazuhisa Mitsuda, Daisuke Nagai, Kohji Yoshikawa …

Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray, 12181, Aug 31, 2022
Perturbation Theory Remixed: Improved Nonlinearity Modeling beyond Standard Perturbation Theory

Wang, Zhenyuan, Jeong, Donghui, Taruya, Atsushi, Nishimichi, Takahiro, Osato, Ken

Physical Review D, 107(10) 103534, Aug, 2022 Peer-reviewed

Books and Other Publications

次世代銀河分光観測に向けたフィールドレベル解析の確立

大里健

東京大学情報基盤センター, Jan, 2024
Cosmology and Astrophysics of Galaxy Clusters with Weak Gravitational Lensing and the Thermal Sunyaev-Zel'dovich Effect

Ken Osato

Astronomical Herald, Mar, 2020

Presentations

Simulations for HSC Medium-Band Cosmological Surveys

Ken Osato

2nd HSC Medium-band Filter Workshop, Nov 27, 2024
Multi-wavelength Cosmological Simulations for Stage-IV Surveys

Ken Osato

Theory and Data Analysis Challenges for Cosmological Large-Scale Structure Observations, Nov 19, 2024
Current Status of Optical/Near-IR Cosmological Surveys

Ken Osato

THxOBS Japan workshop 2024, Oct 26, 2024 Invited
Stage-IV宇宙論サーベイ観測に向けた多波長模擬観測シミュレーション

大里健

第13回観測的宇宙論ワークショップ, Sep 26, 2024
銀河形成シミュレーションを用いた輝線銀河クラスタリングによる宇宙論

大里健

日本天文学会2024年秋季年会, Sep 13, 2024
Multi-wavelength Cosmological Simulations for Stage-IV Surveys

Ken Osato

The Second SUPER-IRNET Workshop: Sparkling Our Collaboration at the Cosmic Gate, Jul 26, 2024
Clustering of Emission Line Galaxies Explored with Hydrodynamical Simulations

Ken Osato

LSS Quest 2024, Jun 25, 2024 Invited
Simulating Sunyaev-Zel'dovich Effects with Baryon Pasting

Ken Osato, Daisuke Nagai

Baryons in the Universe 2024, Apr 9, 2024
Field-level inference with differentiable GridSPT

Ken Osato, Atsushi Taruya, Takahiro Nishimichi, Donghui Jeong, Zhenyuan Wang

Statistical Analysis of Random Fields in Cosmology, Mar 6, 2024
The sigma8 tension in light of the cross-correlation between HSC weak lensing and ACT thermal Sunyaev-Zel'dovich effect

Ken Osato, Masato Shirasaki, Hironao Miyatake, Daisuke Nagai, Naoki Yoshida, Mathew Madhavacheril, William R. Coulton

Gravity and Cosmology 2024, Feb 9, 2024
Field-level inference with differentiable GridSPT

大里健, 西道啓博, 樽家篤史, Donghui Jeong, Zhenyuan Wang

第12回観測的宇宙論ワークショップ, Dec 11, 2023
Applications of hydro simulations for weak lensing and galaxy clustering cosmology

Ken Osato

Cosmology with the Large Scale Structure of the Universe, May 16, 2023 Invited
Cosmology and cluster astrophysics with HSC WL x ACT tSZ

Ken Osato, Masato Shirasaki, Hironao Miyatake, Daisuke Nagai, Masamune Oguri, Naoki Yoshida, William Coulton, Mathew Madhavacheril, HSC WL WG, ACT Collaboration

Future Science with CMB x LSS, Apr 10, 2023
Galaxy clustering analysis with future cosmological spectroscopic surveys

大里健

第11回観測的宇宙論ワークショップ, Dec 13, 2022 Invited
Intrinsic alignments with galaxy formation hydrodynamical simulations

Ken Osato, Teppei Okumura

New Frontiers in Cosmology with the Intrinsic Alignments of Galaxies, Dec 8, 2022
Numerical simulations as a tool to scrutinise the physics of dark matter

Ken Osato

DM3 - Deep insights and Multiple strategies for Deciphering the Mystery of Dark Matter, Sep 15, 2022 Invited
Applications of Hydrodynamical Simulations for Clustering of Emission Line Galaxies

Ken Osato, Teppei Okumura

From galaxies to cosmology with deep spectroscopic surveys, Jul 4, 2022
Galaxy Formation Simulations for Galaxy Clustering with Emission Line Galaxies

Ken Osato, Teppei Okumura

Cosmic Cartography 2022: Exploring the Cosmic Web and Large-Scale Structure, Mar 8, 2022
Intrinsic alignments with numerical simulations

Ken Osato

Galaxy shape statistics and Cosmology, Nov 30, 2021
Galaxy Formation Simulations for Cosmology with Emission Line Galaxies

大里健, 奥村哲平

第10回観測的宇宙論ワークショップ, Nov 18, 2021

Teaching Experience

Dec, 2024 - Jan, 2025

Introduction to Practical Machine Learning (Chiba University)
Oct, 2024 - Jan, 2025

Exercises on Electromagnetism (Basic) 1 (Chiba University)
Apr, 2024 - Jul, 2024

Frontier Science Seminar IIIA (Statistical mechanics) (Chiba University)
Apr, 2024 - Jul, 2024

Frontier Science Seminar IA (Calculus, Linear algebra) (Chiba University)
Dec, 2023 - Jan, 2024

Introduction to Practical Machine Learning (Chiba University)
Oct, 2023 - Jan, 2024

Frontier Science Seminar IIB (Electrodynamics) (Chiba University)
Apr, 2023 - Jul, 2023

Exercises for Fundamental Physics II (Astrophysics) (Chiba University)
Oct, 2015 - Mar, 2016

Exercises in Physics VI (Electrodynamics, Statistical mechanics) (The University of Tokyo)
Oct, 2014 - Mar, 2015

Analytical Mechanics (The University of Tokyo)

Professional Memberships

Apr, 2023 - Present

Group of Optical and Infrared Astronomers
Apr, 2019 - Present

European Astronomical Society
Apr, 2019 - Present

Société Française d’Astronomie et d’Astrophysique
Apr, 2016 - Present

Physical Society of Japan
Jan, 2016 - Present

理論天文学宇宙物理学懇談会
Apr, 2014 - Present

Astronomical Society of Japan

Research Projects

Resolving the S8 tension with joint cosmology probe method of Subaru HSC and PFS data

Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (A), Japan Society for the Promotion of Science, Apr, 2024 - Mar, 2029
次世代宇宙広域探査に向けた多波長宇宙論的シミュレーションと観測データ解析への応用

日揮・実吉奨学会, Sep, 2024 - Aug, 2025

大里健
Field-level approach for upcoming cosmological spectroscopic surveys

Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists, Grant-in-Aid for Early-Career Scientists, Japan Society for the Promotion of Science, Apr, 2022 - Mar, 2025
次世代宇宙広域探査に向けた多波長宇宙論的シミュレーション

笹川科学研究助成, 日本科学協会, Apr, 2024 - Feb, 2025

大里健
Exploring Precision Cosmology with Next-generation Wide and Deep Surveys

Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows, Grant-in-Aid for JSPS Fellows, Japan Society for the Promotion of Science, Apr, 2021 - Mar, 2023
Cosmology with large-scale galaxy formation simulations

Grants-in-Aid for Scientific Research Grant-in-Aid for JSPS Fellows, Grant-in-Aid for JSPS Fellows, Japan Society for the Promotion of Science, Apr, 2016 - Mar, 2019

Profile Information

Research Interests

Major Research Areas

Research History

Education

Awards

Papers

Books and Other Publications

Presentations

Teaching Experience

Professional Memberships

Research Projects

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