Exploring the origin of cosmic acceleration through weak lensing measurements of a Subaru wide-field galaxy survey

• Project Area: Why does the Universe accelerate? - Exhaustive study and challenge for the future -
• Project/Area Number: 18H04350
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Research Institution: Nagoya University
• Principal Investigator: 宮武 広直 名古屋大学, 高等研究院(理), 特任助教 (20784937)
• Project Period (FY): 2018-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000); Fiscal Year 2019: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2018: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
• Keywords: 観測的宇宙論 / 弱重力レンズ効果 / 銀河 / 宇宙の大規模構造 / 重力レンズ / 暗黒エネルギー / 暗黒物質 / 銀河自己相関関数 / 銀河団 / 宇宙論 / ダークエネルギー

Outline of Annual Research Achievements

本研究の目的は、すばる望遠鏡新超広視野主焦点カメラHyper Suprime-Cam (HSC)によるすばる望遠鏡戦略枠サーベイのデータを用いた弱重力レンズ効果の測定を通して、世界最高精度で宇宙の加速膨張の性質に制限を付けることである。本年度は、昨年度に引き続き、Sloan Digital Sky Survey (SDSS) III / Baryon Oscillation Spectroscopic Survey (BOSS)の分光銀河カタログとHSCサーベイ初年度の銀河形状カタログを組み合わせることで、銀河自己相関関数と銀河弱重力レンズ効果を測定することで、宇宙論パラメータに制限を付けるための研究を主に行なった。モック信号を用いて高精度で宇宙論情報を引き出すための理論モデルを構築し、実際のデータを用いて、Dark Energy Surgey (DES), Kilo Degree Survey (KiDS)などの世界の他の競合するサーベイと同等もしくはそれ以上の精度で宇宙論を制限することが可能となった。本解析はブラインド解析を行っており、さらなる系統誤差のテストの後、次年度始めにはブラインドを取り去り、論文を執筆する予定である。
HSCサーベイ初年度の銀河形状カタログを用いた他の解析としては、高感度・高角度分解能マイクロ波望遠鏡PolarBearで測定された重力レンズ効果とHSCで測定された重力レンズ効果の相互相関を測定する研究を行った。
昨年度から行ってきた、HSCサーベイ３年目まで銀河形状カタログの作成は、画像解析に問題が見つかったため、サーベイ4年目までのデータを用いた新しい画像解析に基づいた作成を行った。系統誤差のテストはほぼ完了し、来年度始めには画像シミュレーションを用いた銀河形状の補正係数を求め、銀河形状カタログが完成する予定である。

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] Center for Computational Astrophysics/Cornell University/Princeton University(米国)
• [Int'l Joint Research] University of KwaZulu-Natal(南アフリカ)
• [Int'l Joint Research] University of Toronto(カナダ)
• [Int'l Joint Research] Cardiff University/University of Cambridge/University of Oxford(英国)
• [Int'l Joint Research] Pontificia Universidad Catlica de Chile(チリ)
• [Int'l Joint Research]
• [Int'l Joint Research] Princeton University/Carnegie Mellon University/Lawrence Livermore National Laboratory,(米国)
• [Int'l Joint Research] IUCAA(インド)
• [Int'l Joint Research] University of Geneva(スイス)
• [Int'l Joint Research] ASIAA(台湾)
• [Int'l Joint Research] University of KwaZulu-Natal(南アフリカ)
• [Int'l Joint Research]
• [Journal Article] Cosmological constraints from cosmic shear two-point correlation functions with HSC survey first-year data (2020)
  • Author(s): Hamana Takashi、Shirasaki Masato、Miyazaki Satoshi、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 72 Issue: 1 Pages: 16-16
  • DOI: 10.1093/pasj/psz138
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Tomographic galaxy clustering with the Subaru Hyper Suprime-Cam first year public data release (2020)
  • Author(s): Nicola Andrina、Alonso David、Sanchez Javier、Slosar Anze、Awan Humna、Broussard Adam、Dunkley Jo、Gawiser Eric、Gomes Zahra、Mandelbaum Rachel、Miyatake Hironao、Newman Jeffrey A.、Sevilla-Noarbe Ignacio、Skinner Sarah、Wagoner Erika L.
  • Journal Title: Journal of Cosmology and Astroparticle Physics Volume: 2020 Issue: 03 Pages: 044-044
  • DOI: 10.1088/1475-7516/2020/03/044
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evidence for the Cross-Correlation between Cosmic Microwave Background Polarization Lensing from Polarbear and Cosmic Shear from Subaru Hyper Suprime-Cam (2019)
  • Author(s): Toshiya Namikawa, Yuji Chinone, Hironao Miyatake, Masamune Oguri, et al.
  • Journal Title: The Astrophysical Journal Volume: 882 Issue: 1 Pages: 62-62
  • DOI: 10.3847/1538-4357/ab3424
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Dark Quest. I. Fast and Accurate Emulation of Halo Clustering Statistics and Its Application to Galaxy Clustering (2019)
  • Author(s): Nishimichi Takahiro、Takada Masahiro、Takahashi Ryuichi、Osato Ken、Shirasaki Masato、Oogi Taira、Miyatake Hironao、Oguri Masamune、Murata Ryoma、Kobayashi Yosuke、Yoshida Naoki
  • Journal Title: The Astrophysical Journal Volume: 884 Issue: 1 Pages: 29-29
  • DOI: 10.3847/1538-4357/ab3719
  • NAID: 120006997064
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Weak-lensing Mass Calibration of ACTPol Sunyaev-Zel'dovich Clusters with the Hyper Suprime-Cam Survey (2019)
  • Author(s): Miyatake Hironao、Battaglia Nicholas、Hilton Matt et al.
  • Journal Title: The Astrophysical Journal Volume: 875 Issue: 1 Pages: 63-63
  • DOI: 10.3847/1538-4357/ab0af0
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data (2019)
  • Author(s): Hikage Chiaki、Oguri Masamune、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 印刷中 Issue: 2 Pages: 43-43
  • DOI: 10.1093/pasj/psz010
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Cosmological Constraints from Galaxy-galaxy Lensing and Clustering with the Subaru HSC and SDSS BOSS Data (2020)
  • Author(s): Hironao Miyatake
  • Organizer: Cosmic Acceleration Conference
  • Int'l Joint Research
• [Presentation] Weak Lensing Cosmology from Subaru Hyper Supreme-cam First Year Data (2019)
  • Author(s): Hironao Miyatake
  • Organizer: 6th Korea-Japan workshop on dark energy at KMI
  • Int'l Joint Research / Invited
• [Presentation] Cosmological Constraints from Galaxy-galaxy Lensing and Clustering with the Subaru HSC and SDSS BOSS Data (2019)
  • Author(s): Hironao Miyatake
  • Organizer: Subaru Telescope 20th Anniversary Conference
  • Int'l Joint Research
• [Presentation] Cosmological Constraints from Galaxy-galaxy Lensing and Clustering with the Subaru HSC and BOSS Data (2019)
  • Author(s): Hironao Miyatake
  • Organizer: LSST@ASIA
  • Int'l Joint Research
• [Presentation] Unveiling the Dark Sector of the Universe with Subaru Hyper Suprime-Cam (2019)
  • Author(s): Hironao Miyatake
  • Organizer: Future Perspective in Cosmology and Gravity
  • Int'l Joint Research / Invited
• [Presentation] Weak Lensing Cosmology from the Subaru Hyper Suprime-Cam Survey First Year Data (2019)
  • Author(s): 宮武広直
  • Organizer: セミナー(千葉大学)
• [Presentation] Weak Lensing Cosmology from the Subaru Hyper Suprime-Cam Survey First Year Data (2019)
  • Author(s): 宮武広直
  • Organizer: セミナー(京都大学)
• [Presentation] Cosmology Challenge Towards Robust Modeling of galaxy-galaxy lensing and clustering signals (2019)
  • Author(s): Hironao Miyatake
  • Organizer: Accurate lensing in the era of precision Cosmology
  • Int'l Joint Research
• [Presentation] Cosmological Constraints From Galaxy-galaxy Lensing and Galaxy-galaxy Clustering with the HSC And BOSS Data (2019)
  • Author(s): Hironao Miyatake
  • Organizer: Accelerating Universe in the Dark
  • Int'l Joint Research
• [Presentation] Subaru Hyper Suprime-Cam Weak Lensing Measurement of Galaxy Clusters Selected by Atacama Cosmology Telescope Polarimeter (2018)
  • Author(s): Hironao Miyatake
  • Organizer: SUGAR-RUSH
  • Int'l Joint Research
• [Presentation] First-Year Cosmological Results From the Subaru Hyper Suprime-Cam Survey (2018)
  • Author(s): Hironao Miyatake
  • Organizer: 42nd COSPAR Scientific Assembly
  • Int'l Joint Research
• [Presentation] Halo Bias as a Probe of Astrophysics and Systematics in Cosmological Constraints (2018)
  • Author(s): 宮武広直
  • Organizer: ダークマターハロー研究会
  • Invited
• [Presentation] Photo-z Systematics in HSC Weak Lensing Measurements (2018)
  • Author(s): Hironao Miyatake
  • Organizer: Colours of the Universe: Photometric Redshifts for Large-scale Sky Surveys
  • Int'l Joint Research / Invited
• [Presentation] Baryonic Effects in Weak Lensing Measurements (2018)
  • Author(s): Hironao Miyatake
  • Organizer: ICM Physics and Modeling
  • Int'l Joint Research
• [Presentation] すばる望遠鏡 Hyper Suprime-Camで迫る宇宙の暗黒成分の謎 (2018)
  • Author(s): 宮武広直
  • Organizer: 京都産業大学 理学部 宇宙物理・気象学科 談話会
  • Invited
• [Presentation] すばる望遠鏡 Hyper Suprime-Camにおける弱重力レンズ効果の精密測定 (2018)
  • Author(s): 宮武広直
  • Organizer: 第７回観測的宇宙論ワークショップ
  • Invited