Tomoaki Ishiyama

Profile Information

Affiliation: Chiba University

Degree: Ph. D(Mar, 2010, The University of Tokyo)

ORCID iD: https://orcid.org/0000-0002-5316-9171
J-GLOBAL ID: 201901011083613189
researchmap Member ID: B000364073

External link: http://hpc.imit.chiba-u.jp/~ishiymtm/

Research History

Apr, 2023 - Present

Chiba University
Mar, 2015 - Mar, 2023

Chiba University
May, 2011 - Feb, 2015

Center for Computational Sciences, University of Tsukuba

Awards

Nov, 2022

千葉大学先進学術賞

石山智明
Apr, 2022

Netexplo innovation award 2022

Tomoaki Ishiyama
Jun, 2014

筑波大学若手教員特別奨励賞

石山智明
May, 2014

平成26年度科学技術分野の文部科学大臣表彰

石山智明
Nov, 2012

Gordon Bell Prize

石山智明

Papers

Evolution of clustering in cosmological models with time-varying dark energy

Tomoaki Ishiyama, Francisco Prada, Anatoly A. Klypin

Mar 25, 2025 Lead authorCorresponding author
Baryon Pasting the Uchuu Light-cone Simulation

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

The Astrophysical Journal, 980(1) 122-122, Feb 7, 2025 Peer-reviewed
A Semi-analytic Framework of Population III and Subsequent Galaxy Formation on Ultralarge Cosmological N-body Simulations

Tomoaki Ishiyama, Shingo Hirano

Jan 29, 2025 Lead authorCorresponding author
Constraining cosmological parameters using void statistics from the SDSS survey

Elena Fernández-García, Juan E. Betancort-Rijo, Francisco Prada, Tomoaki Ishiyama, Anatoly Klypin, Julia Ereza

Astronomy & Astrophysics, Jan 23, 2025 Peer-reviewed
MPI-Rockstar: a Hybrid MPI and OpenMP Parallel Implementation of the Rockstar Halo finder

Tomoyuki Tokuue, Tomoaki Ishiyama, Ken Osato, Satoshi Tanaka, Peter Behroozi

Dec 21, 2024 Corresponding author
The Uchuu-GLAM BOSS and eBOSS LRG lightcones: exploring clustering and covariance errors

Julia Ereza, Francisco Prada, Anatoly Klypin, Tomoaki Ishiyama, Alex Smith, Carlton M Baugh, Baojiu Li, César Hernández-Aguayo, José Ruedas

Monthly Notices of the Royal Astronomical Society, 532(2) 1659-1682, Jun 21, 2024 Peer-reviewed
The Uchuu-SDSS galaxy lightcones: A clustering, Redshift Space Distortion and Baryonic Acoustic Oscillation study

C A Dong-Páez, A Smith, A O Szewciw, J Ereza, M H Abdullah, C Hernández-Aguayo, S Trusov, F Prada, A Klypin, T Ishiyama …

Monthly Notices of the Royal Astronomical Society, Jan 9, 2024 Peer-reviewed
Optimizing the gravitational tree algorithm for many-core processors

Tomoyuki Tokuue, Tomoaki Ishiyama

Monthly Notices of the Royal Astronomical Society, Dec 29, 2023 Peer-reviewedCorresponding author
The correlation function and detection of baryon acoustic oscillation peak from the spectroscopic <tt>SDSS-GalWCat</tt> galaxy cluster catalogue

Mohamed H Abdullah, Anatoly Klypin, Francisco Prada, Gillian Wilson, Tomoaki Ishiyama, Julia Ereza

Monthly Notices of the Royal Astronomical Society: Letters, 529(1) L54-L59, Dec 27, 2023 Peer-reviewed
Uchuu–ν2GC galaxies and AGN: cosmic variance forecasts of high-redshift AGN for JWST, Euclid, and LSST

Taira Oogi, Tomoaki Ishiyama, Francisco Prada, Manodeep Sinha, Darren Croton, Sofía A Cora, Eric Jullo, Anatoly A Klypin, Masahiro Nagashima, J López Cacheiro …

Monthly Notices of the Royal Astronomical Society, 525(3) 3879-3895, Sep, 2023 Peer-reviewed
Constraining Cosmological Parameters Using the Cluster Mass–Richness Relation

Mohamed H. Abdullah, Gillian Wilson, Anatoly Klypin, Tomoaki Ishiyama

The Astrophysical Journal, 955(1) 26-26, Sep, 2023 Peer-reviewed
Performance Evaluation of Parallel Sortings on the Supercomputer Fugaku

Tomoyuki Tokuue, Tomoaki Ishiyama

Journal of Information Processing, 31 452-458, Aug, 2023 Peer-reviewedCorresponding author
Dark Matter Halo Properties of the Galactic Dwarf Satellites: Implication for Chemo-dynamical Evolution of the Satellites and a Challenge to Lambda Cold Dark Matter

Kohei Hayashi, Yutaka Hirai, Masashi Chiba, Tomoaki Ishiyama

The Astrophysical Journal, 953(2) 185-185, Aug 1, 2023 Peer-reviewed
Confirmation of the standard cosmological model from red massive galaxies $\sim600$ Myr after the Big Bang

Francisco Prada, Peter Behroozi, Tomoaki Ishiyama, Anatoly Klypin, Enrique Pérez

Apr 24, 2023
CONCERTO: Simulating the CO, [CII], and [CI] line emission of galaxies in a 117 deg² field and the impact of field-to-field variance

A. Gkogkou, M. Béthermin, G. Lagache, M. Van Cuyck, E. Jullo, M. Aravena, A. Beelen, A. Benoit, J. Bounmy, M. Calvo …

Astronomy & Astrophysics, 670 A16-A16, Jan 27, 2023 Peer-reviewed
The Uchuu-universe machine data set: galaxies in and around clusters

Han Aung, Daisuke Nagai, Anatoly Klypin, Peter Behroozi, Mohamed H Abdullah, Tomoaki Ishiyama, Francisco Prada, Enrique Pérez, Javier López Cacheiro, José Ruedas

Monthly Notices of the Royal Astronomical Society, 519(2) 1648-1656, Dec 23, 2022 Peer-reviewed
ΛCDM halo substructure properties revealed with high-resolution and large-volume cosmological simulations

Ángeles Moliné, Miguel A Sánchez-Conde, Alejandra Aguirre-Santaella, Tomoaki Ishiyama, Francisco Prada, Sofía A Cora, Darren Croton, Eric Jullo, R Benton Metcalf, Taira Oogi …

Monthly Notices of the Royal Astronomical Society, 518(1) 157-173, Oct 31, 2022 Peer-reviewed
Semi-analytical frameworks for subhaloes from the smallest to the largest scale

Nagisa Hiroshima, Shin’ichiro Ando, Tomoaki Ishiyama

Monthly Notices of the Royal Astronomical Society, 517(2) 2728-2737, Oct 18, 2022 Peer-reviewed
Constraining self-interacting dark matter with dwarf spheroidal galaxies and high-resolution cosmological N -body simulations

Toshihiro Ebisu, Tomoaki Ishiyama, Kohei Hayashi

Physical Review D, 105(2), Jan 14, 2022 Peer-reviewedCorresponding author
High Performance Gravitational N-body Simulations on Supercomputer Fugaku

Tomoaki Ishiyama, Kohji Yoshikawa, Ataru Tanikawa

International Conference on High Performance Computing in Asia-Pacific Region, Jan 7, 2022 Peer-reviewedLead authorCorresponding author

Research Projects

大規模革新的シミュレーションによる宇宙天体形成史の統一的解明

国際高等研究基幹・学際的先端研究支援プログラム・次世代展開型, 千葉大学, Apr, 2022 - Mar, 2028

石山智明
「富岳」成果創出加速プログラム「シミュレーションとAIの融合で解明する宇宙の構造と進化」

文部科学省, Apr, 2023 - Mar, 2026
高性能計算と観測の協働で挑むダークマターの正体解明

科学研究費助成事業, 学術変革領域研究(A), 日本学術振興会, Apr, 2023 - Mar, 2025

石山智明
大規模高解像度シミュレーションを用いた高赤方偏移天体の形成と進化の研究

科学研究費助成事業基盤研究(B), 基盤研究(B), 日本学術振興会, Apr, 2021 - Mar, 2025

石山智明
「富岳」成果創出加速プログラム「宇宙の構造形成と進化から惑星表層環境変動までの統一的描像の構築」

文部科学省, Apr, 2020 - Mar, 2023
高解像度シミュレーションを用いた暗黒物質分布の精密評価

科学研究費助成事業新学術領域研究(研究領域提案型), 新学術領域研究(研究領域提案型), 日本学術振興会, Apr, 2020 - Mar, 2022

石山智明
Origin of Galactic First Generation Stars Based on Both Obserbations and Simulations of Very Metal-Poor Stars

Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A), Grant-in-Aid for Scientific Research (A), Japan Society for the Promotion of Science, Apr, 2017 - Mar, 2021
大規模数値シミュレーションによる、初代星からはじまる宇宙初期の天体形成史の研究

科学研究費助成事業若手研究(A), 若手研究(A), 日本学術振興会, Apr, 2017 - Mar, 2021

石山智明
大規模シミュレーションを用いた初代星からはじまる宇宙の天体形成・進化の理論的研究

科学研究費助成事業国際共同研究加速基金(国際共同研究強化(A)), 国際共同研究加速基金(国際共同研究強化(A)), 日本学術振興会, 2019 - 2021

石山智明
大規模シミュレーションと次世代超広視野分光観測で解き明かすダークマターの正体

科学研究費助成事業新学術領域研究(研究領域提案型), 新学術領域研究(研究領域提案型), 日本学術振興会, Apr, 2018 - Mar, 2020

石山智明
Developing a new framework of gravitational N-body simulations for exascale computing

Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research, Grant-in-Aid for Challenging Exploratory Research, Japan Society for the Promotion of Science, Apr, 2015 - Mar, 2018

Ishiyama Tomoaki
「京」コンピュータによる暗黒物質の位相空間分布に関する研究

科学研究費助成事業新学術領域研究(研究領域提案型), 新学術領域研究(研究領域提案型), 日本学術振興会, Apr, 2015 - Mar, 2017

石山智明
Revealing fine structures of galactic dark matter halos and its implication for dark matter detection experiments

Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B), Grant-in-Aid for Young Scientists (B), Japan Society for the Promotion of Science, Apr, 2012 - Mar, 2015

ISHIYAMA Tomoaki
超大規模シミュレーションで探る銀河の形成・進化

科学研究費助成事業特別研究員奨励費, 特別研究員奨励費, 日本学術振興会, 2009 - 2010

石山智明

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