Particle Physics Properties of DM probed by gamma-ray, LSBGs and IGM

• Project Area: What is dark matter? - Comprehensive study of the huge discovery space in dark matter
• Project/Area Number: 21H05454
• Research Category: Grant-in-Aid for Transformative Research Areas (A)
• Allocation Type: Single-year Grants
• Review Section: Transformative Research Areas, Section (II)
• Research Institution: Nagoya University
• Principal Investigator: 西澤 淳 名古屋大学, 高等研究院, 招へい教員 (70402435)
• Project Period (FY): 2021-09-10 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2021: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: ダークマター / 機械学習 / ガンマ線 / 低表面輝度銀河 / 対消滅

Outline of Research at the Start

本研究計画は、ダークマターの素粒子的性質に多角的な天文観測データ・手法を用いて制限を与えることを目的としている。2 年間の研究期間で、主に天文データ解析と数値シミュレーションによる研究手法の開発を同時並行で行う。
我々はガンマ線観測と低表面輝度銀河の相互相関による新しい統計解析により、従来の矮小銀河解析とは独立な制限を与える手法を開発している。本手法を実データに応用することで、1TeV 付近の対消滅散乱断面積に制限を与える。
また、質量が 1MeV以下になってくると、宇宙大規模構造の形成過程に影響が生じる。その影響を深層学習による画像解析を応用し、従来よりも精緻なダークマター質量推定を目指す。

Outline of Annual Research Achievements

本年度は、keVスケールのダークマターに対して、宇宙大規模構造の揺らぎのパターンからその質量やダークマターモデルに制限を与える研究に従事した。1報目の論文では、宇宙論的流体シミュレーションを用いて擬似的な21cm線マップを構築し、その揺らぎのパターンから機械学習的な方法論を用いてダークマター質量に制限を与える研究を行なった。また、特に天体物理学的なモデルの不定性がどの程度制限に影響を与えるかを定量的に議論を行なった。
2報目の論文では、素粒子実験等でダークマターの質量が決まった場合に、どのような物理プロセスでダークマター粒子が生成されたかを決めるダークマター位相空間分布への制限を考慮した。1報目と同様21cm線マップによる制限を考慮しているが、CDMモデルからの分離ではなく、異なるダークマターモデル間同士の見分けが可能かどうかを論じた。
本年度は、その他関連する論文を合計11報、研究発表を5件行った(うち3件招待講演) 。

Research Progress Status

令和4年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和4年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] Hangzhou institute for advanced study(中国)
• [Int'l Joint Research] Princeton University/University of Arizona/Carnegie Melon University(米国)
• [Journal Article] Impact of astrophysical effects on the dark matter mass constraint with 21 cm intensity mapping (2024)
  • Author(s): Murakami Koya, Nishizawa Atsushi J., Nagamine Kentaro, Shimizu Ikko
  • Journal Title: MNRAS Volume: 530 Issue: 2 Pages: 2-2
  • DOI: 10.1093/mnras/stae945
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Line-of-sight structure of troughs identified in <i>Subaru</i> Hyper Suprime-Cam Year 3 weak lensing mass maps (2023)
  • Author(s): Shimasue Takumi、Osato Ken、Oguri Masamune、Shimakawa Rhythm、Nishizawa Atsushi J
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 527 Issue: 3 Pages: 5974-5987
  • DOI: 10.1093/mnras/stad3542
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hyper Suprime-Cam Year 3 results: Cosmology from galaxy clustering and weak lensing with HSC and SDSS using the minimal bias model (2023)
  • Author(s): Sugiyama Sunao、Miyatake Hironao、More Surhud、Li Xiangchong、et al.
  • Journal Title: Physical Review D Volume: 108 Issue: 12 Pages: 123521-123521
  • DOI: 10.1103/physrevd.108.123521
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hyper Suprime-Cam Year 3 results: Measurements of clustering of SDSS-BOSS galaxies, galaxy-galaxy lensing, and cosmic shear (2023)
  • Author(s): More Surhud、Sugiyama Sunao、Miyatake Hironao、Rau Markus Michae、、、Nishizawa Atsushi、、、Miyazaki Satoshi、、、et al.
  • Journal Title: Physical Review D Volume: 108 Issue: 12 Pages: 123520-123520
  • DOI: 10.1103/physrevd.108.123520
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hyper Suprime-Cam Year 3 results: Cosmology from cosmic shear power spectra (2023)
  • Author(s): Dalal Roohi、Li Xiangchong、Nicola Andrina、Zuntz Joe、Strauss Michael A. 、、Miyatake Hironao、、、Oguri Masamune、、、Nishizawa Atsushi、、、Miyazaki Satoshi、、、et al.
  • Journal Title: Physical Review D Volume: 108 Issue: 12 Pages: 123519-123519
  • DOI: 10.1103/physrevd.108.123519
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hyper Suprime-Cam Year 3 results: Cosmology from cosmic shear two-point correlation functions (2023)
  • Author(s): Li Xiangchong、Zhang Tianqing、Sugiyama Sunao、Dalal Roohi、Terasawa Ryo、Rau Markus M. et al.
  • Journal Title: Physical Review D Volume: 108 Issue: 12 Pages: 1-1
  • DOI: 10.1103/physrevd.108.123518
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hyper Suprime-Cam Year 3 results: Cosmology from galaxy clustering and weak lensing with HSC and SDSS using the emulator based halo model (2023)
  • Author(s): Miyatake Hironao、Sugiyama Sunao、Takada Masahiro、Nishimichi Takahiro, 、、Nishizawa Atsushi、、、Oguri Masamune、、、Miyazaki Satoshi、、、et al.
  • Journal Title: Physical Review D Volume: 108 Issue: 12 Pages: 123517-123517
  • DOI: 10.1103/physrevd.108.123517
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] AGN number fraction in galaxy groups and clusters at z > 1.4 from the Subaru Hyper Suprime-Cam survey (2023)
  • Author(s): Hashiguchi Aoi、Toba Yoshiki、Ota Naomi、Oguri Masamune、Okabe Nobuhiro、Ueda Yoshihiro、Imanishi Masatoshi、Yamada Satoshi、Goto Tomotsugu、Koyama Shuhei、Lee Kianhong、Mitsuishi Ikuyuki、Nagao Tohru、Nishizawa Atsushi J、Noboriguchi Akatoki、Oogi Taira、Sakuta Koki、Schramm Malte、et al.
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 75 Issue: 6 Pages: 1246-1261
  • DOI: 10.1093/pasj/psad066
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Robustness of baryon acoustic oscillations measurements with photometric redshift uncertainties (2023)
  • Author(s): Ishikawa Keitaro、Sunayama Tomomi、Nishizawa Atsushi J、Miyatake Hironao、Nishimichi Takahiro
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 526 Issue: 4 Pages: 5374-5385
  • DOI: 10.1093/mnras/stad3078
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Radial and Local Density Dependence of Star Formation Properties in Galaxy Clusters from the Hyper Suprime-Cam Survey (2023)
  • Author(s): Jian Hung-Yu, Lin Lihwai, Hsieh Bau-Ching, Umetsu Keiichi, Lopez-Coba Carlos, Oguri Masamune, Bottrell Connor, Toba Yoshiki, Koyama Yusei, Chang Yu-Yen, Kodama Tadayuki, Komiyama Yutaka, More Surhud, Lin Kai-Yang, Nishizawa Atsushi J., Tanaka Ichi
  • Journal Title: ApJ Volume: 957 Issue: 2 Pages: 85-85
  • DOI: 10.3847/1538-4357/acfc22
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Weak lensing tomographic redshift distribution inference for the Hyper Suprime-Cam Subaru Strategic Program three-year shape catalogue (2023)
  • Author(s): Rau Markus Michael, Dalal Roohi, Zhang Tianqing, Li Xiangchong, Nishizawa Atsushi J., More Surhud, Mandelbaum Rachel, Miyatake Hironao, Strauss Michael A., Takada Masahiro
  • Journal Title: mnras Volume: 524 Issue: 4 Pages: 5109-5131
  • DOI: 10.1093/mnras/stad1962
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Quasar Luminosity Function at z = 7 (2023)
  • Author(s): Matsuoka Yoshiki, Onoue Masafusa, et al.
  • Journal Title: ApJL Volume: 949 Issue: 2 Pages: L42-L42
  • DOI: 10.3847/2041-8213/acd69f
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Image based Cosmology on the large-scale structure of the Universe (2024)
  • Author(s): 西澤淳
  • Organizer: KEK COSMO 2024
  • Int'l Joint Research / Invited
• [Presentation] Subaru HSC medium band filters and photometric redshift (2023)
  • Author(s): 西澤淳
  • Organizer: ILRキックオフミーティング
  • Int'l Joint Research
• [Presentation] Subaru HSC medium band filters survey (2023)
  • Author(s): 西澤淳
  • Organizer: 銀河間物質研究会
• [Presentation] Subaru HSC medium band filters and photometric redshift (2023)
  • Author(s): 西澤淳
  • Organizer: Madrid Nagoya Joint Workshop
  • Int'l Joint Research / Invited
• [Presentation] Subaru HSC medium band filters survey (2023)
  • Author(s): 西澤淳
  • Organizer: Subaru Mediumband filter workshop
  • Invited
• [Presentation] DES Y3とFermi LATによる ダークマター対消滅に関する制限 (2022)
  • Author(s): 西澤淳
  • Organizer: 天文学会春季年会
• [Presentation] Particle Physics Properties of DM probed by gamma-ray, LSBGs and IGM (2022)
  • Author(s): 西澤淳
  • Organizer: 学術変革A科研費シンポジウム
• [Presentation] 21cm 線強度マップの直接画像解析による暗黒物質探査 (2021)
  • Author(s): 村上広椰
  • Organizer: Galaxy-IGM workshop
• [Presentation] 21cm マップの直接画像解析による暗黒物質探査 (2021)
  • Author(s): 村上広椰
  • Organizer: 日本天文学会秋季大会