Namikawa Toshiya 並河俊弥

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NAMIKAWA Toshiya 並河俊弥

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Researcher Number	80708511
Other IDs	https://orcid.org/0000-0003-3070-9240
Affiliation (Current)	2026: 東京大学, カブリ数物連携宇宙研究機構, 特任准教授
Affiliation (based on the past Project Information) *help	2022 – 2025: 東京大学, カブリ数物連携宇宙研究機構, 特任助教 2024: 東京大学, 学内共同利用施設等, 助教 2013 – 2014: 京都大学, 基礎物理学研究所, 研究員
Review Section/Research Field	Principal Investigator Basic Section 16010:Astronomy-related / Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics / Particle/Nuclear/Cosmic ray/Astro physics
Keywords	Principal Investigator 宇宙マイクロ波背景放射 / 重力レンズ / 観測的宇宙論 / 原始重力波 / Bモード偏光 / 弱い重力レンズ / 宇宙マイクロ波背景輻射

Improving analysis method for delensing to probe inflationary gravitational wavesPrincipal Investigator
- Principal Investigator
  
  並河俊弥
- Project Period (FY)
  2025
- Research Category
  
  Fund for the Promotion of Joint International Research (Fostering Joint International Research)
- Review Section
  
  Basic Section 16010:Astronomy-related
- Research Institution
  The University of Tokyo
Cosmology with new analysis methods for cosmic microwave background B-modesPrincipal Investigator
- Principal Investigator
  
  並河俊弥
- Project Period (FY)
  2025 – 2027
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
- Research Institution
  The University of Tokyo
Developing analysis method for higher-order correlation function to probe inflationary gravitational waves with CMBPrincipal Investigator
- Principal Investigator
  
  Namikawa Toshiya
- Project Period (FY)
  2022 – 2024
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 16010:Astronomy-related
- Research Institution
  The University of Tokyo
Cosmology from weak gravitational lensing of Cosmic Microwave BackgroundPrincipal Investigator
- Principal Investigator
  
  NAMIKAWA Toshiya
- Project Period (FY)
  2013 – 2014
- Research Category
  
  Grant-in-Aid for Research Activity Start-up
- Research Field
  
  Particle/Nuclear/Cosmic ray/Astro physics
- Research Institution
  Kyoto University

All 2025 2024 2023 2022 2015 2014 Other

All Journal Article Presentation

[Journal Article] Tomographic constraint on anisotropic cosmic birefringence2025
- Author(s)
  Namikawa Toshiya
- Journal Title
  
  Physical Review D
  
  Volume: 111 Issue: 2 Pages: 23501-23501
- DOI
  10.1103/physrevd.111.023501
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22K03682
[Journal Article] Exact CMB B-mode power spectrum from anisotropic cosmic birefringence2024
- Author(s)
  Namikawa Toshiya
- Journal Title
  
  Physical Review D
  
  Volume: 109 Issue: 12 Pages: 123521-123521
- DOI
  10.1103/physrevd.109.123521
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22K03682
[Journal Article] Systematic Effects on Lensing Reconstruction from a Patchwork of CMB Polarization Maps2024
- Author(s)
  Nagata Ryo、Namikawa Toshiya
- Journal Title
  
  Progress of Theoretical and Experimental Physics
  
  Volume: 2024, 8, 083E01 Issue: 8 Pages: 1-17
- DOI
  10.1093/ptep/ptae117
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-21K03610, KAKENHI-PROJECT-22K03682
[Journal Article] LiteBIRD science goals and forecasts: a full-sky measurement of gravitational lensing of the CMB2024
- Author(s)
  Lonappan A.I.、et al, the LiteBIRD collaboration, including K. Kohri
- Journal Title
  
  Journal of Cosmology and Astroparticle Physics
  
  Volume: 2024 Issue: 06 Pages: 009-009
- DOI
  10.1088/1475-7516/2024/06/009
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-24H01825, KAKENHI-PROJECT-22K03682, KAKENHI-PROJECT-23KJ1602, KAKENHI-PROJECT-23K03390
[Journal Article] The Simons Observatory: Combining cross-spectral foreground cleaning with multitracer B-mode delensing for improved constraints on inflation2024
- Author(s)
  Hertig Emilie、Wolz Kevin、Namikawa Toshiya、et al.
- Journal Title
  
  Physical Review D
  
  Volume: 110 Issue: 4 Pages: 043532-043532
- DOI
  10.1103/physrevd.110.043532
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Journal Article] The Atacama Cosmology Telescope: reionization kSZ trispectrum methodology and limits2024
- Author(s)
  MacCrann Niall、Qu Frank J、Namikawa Toshiya、et al.
- Journal Title
  
  Monthly Notices of the Royal Astronomical Society
  
  Volume: 532 Issue: 4 Pages: 4247-4260
- DOI
  10.1093/mnras/stae1746
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Journal Article] Constraining ultralight ALP dark matter in light of cosmic birefringence2024
- Author(s)
  Zhang Dongdong、Ferreira Elisa G. M.、Obata Ippei、Namikawa Toshiya
- Journal Title
  
  Physical Review D
  
  Volume: 110 Issue: 10 Pages: 103525-103525
- DOI
  10.1103/physrevd.110.103525
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682, KAKENHI-PROJECT-19K14702
[Journal Article] LiteBIRD science goals and forecasts: improving sensitivity to inflationary gravitational waves with multitracer delensing2024
- Author(s)
  Namikawa T.、et al, The LiteBIRD collaboration, including K. Kohri
- Journal Title
  
  Journal of Cosmology and Astroparticle Physics
  
  Volume: 2024 Issue: 06 Pages: 010-010
- DOI
  10.1088/1475-7516/2024/06/010
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-24H01825, KAKENHI-PROJECT-22K03682, KAKENHI-PROJECT-23KJ1602, KAKENHI-PROJECT-23K03390
[Journal Article] Efficient estimation of rotation-induced bias to reconstructed CMB lensing power spectrum2024
- Author(s)
  Cai Hongbo、Guan Yilun、Namikawa Toshiya、Kosowsky Arthur
- Journal Title
  
  Physical Review D
  
  Volume: 110 Issue: 10 Pages: 103507-103507
- DOI
  10.1103/physrevd.110.103507
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Journal Article] Cosmic birefringence tomography with polarized Sunyaev-Zel'dovich effect2023
- Author(s)
  Toshiya Namikawa, Ippei Obata
- Journal Title
  
  Physical Review D
  
  Volume: 108 Issue: 8 Pages: 083510-083510
- DOI
  10.1103/physrevd.108.083510
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19K14702, KAKENHI-PROJECT-22K03682, KAKENHI-PLANNED-20H05859
[Journal Article] Isotropic cosmic birefringence from early dark energy2023
- Author(s)
  Murai Kai、Naokawa Fumihiro、Namikawa Toshiya、Komatsu Eiichiro
- Journal Title
  
  Physical Review D
  
  Volume: 107 Issue: 4
- DOI
  10.1103/physrevd.107.l041302
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682, KAKENHI-PLANNED-20H05859, KAKENHI-PROJECT-20J20248
[Journal Article] Gravitational lensing effect on cosmic birefringence2023
- Author(s)
  Naokawa Fumihiro、Namikawa Toshiya
- Journal Title
  
  Physical Review D
  
  Volume: 108 Issue: 6 Pages: 063525-063525
- DOI
  10.1103/physrevd.108.063525
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-22K03682, KAKENHI-PLANNED-20H05859
[Journal Article] New Probe of Inflationary Gravitational Waves: Cross-Correlations of Lensed Primary CMB B-Modes with Large-Scale Structure2023
- Author(s)
  Namikawa Toshiya、Sherwin Blake D.
- Journal Title
  
  Physical Review Letters
  
  Volume: 131 Issue: 13 Pages: 131001-131001
- DOI
  10.1103/physrevlett.131.131001
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682, KAKENHI-PLANNED-20H05859
[Journal Article] Constraints on Early Dark Energy from Isotropic Cosmic Birefringence2023
- Author(s)
  Eskilt Johannes R.、Herold Laura、Komatsu Eiichiro、Murai Kai、Namikawa Toshiya、Naokawa Fumihiro
- Journal Title
  
  Physical Review Letters
  
  Volume: 131 Issue: 12 Pages: 121001-121001
- DOI
  10.1103/physrevlett.131.121001
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682, KAKENHI-PLANNED-20H05859
[Journal Article] The reconstructed CMB lensing bispectrum2023
- Author(s)
  Kalaja Alba、Orlando Giorgio、Bowkis Aleksandr、Challinor Anthony、Meerburg P. Daniel、Namikawa Toshiya
- Journal Title
  
  Journal of Cosmology and Astroparticle Physics
  
  Volume: 2023 Issue: 04 Pages: 041-041
- DOI
  10.1088/1475-7516/2023/04/041
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Journal Article] Impact of anisotropic birefringence on measuring cosmic microwave background lensing2023
- Author(s)
  Cai Hongbo、Guan Yilun、Namikawa Toshiya、Kosowsky Arthur
- Journal Title
  
  Physical Review D
  
  Volume: 107 Issue: 4 Pages: 043513-043513
- DOI
  10.1103/physrevd.107.043513
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682, KAKENHI-PLANNED-20H05859
[Journal Article] Future detectability of gravitational-wave induced lensing from high-sensitivity CMB experiments2015
- Author(s)
  Toshiya Namikawa, Daisuke Yamauchi, Atsushi Taruya
- Journal Title
  
  Physical Review D
  
  Volume: 91 Issue: 4 Pages: 043531-043531
- DOI
  10.1103/physrevd.91.043531
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-13J09800, KAKENHI-PROJECT-24540257, KAKENHI-PROJECT-25887033
[Journal Article] Bias-Hardened CMB Lensing with Polarization2014
- Author(s)
  Toshiya Namikawa and Ryuichi Takahashi
- Journal Title
  
  Monthly Notices of Royal Astronomical Society
  
  Volume: 438 Issue: 2 Pages: 1507-1517
- DOI
  10.1093/mnras/stt2290
- NAID
  120005385899
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25887033
[Journal Article] Cosmology from weak lensing of CMB2014
- Author(s)
  Toshiya Namikawa
- Journal Title
  
  Progress of Theoretical and Experimental Physics
  
  Volume: 2014 Issue: 6 Pages: 6B108-0
- DOI
  10.1093/ptep/ptu044
- NAID
  120005466708
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-25887033
[Journal Article] Lensing reconstruction from a patchwork of polarization maps2014
- Author(s)
  Toshiya Namikawa, Ryo Nagata
- Journal Title
  
  Journal of Cosmology and Astroparticle Physics
  
  Volume: 09 Issue: 09 Pages: 009-009
- DOI
  10.1088/1475-7516/2014/09/009
- NAID
  120005657912
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-25887033
[Presentation] 非等方な宇宙複屈折効果を取り入れた厳密なBモード角度パワースペクトル2025
- Author(s)
  並河俊弥
- Organizer
  日本天文学会2025年春季年会
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] New Probe of Inflationary Gravitational Waves: Cross-Correlations of Lensed Primary CMB B-Modes with Large-Scale Structure2024
- Author(s)
  並河俊弥
- Organizer
  New Physics from Old Light workshop
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] New Probe of Inflationary Gravitational Waves: Cross-Correlations of Lensed Primary CMB B-Modes with Large-Scale Structure2024
- Author(s)
  並河俊弥
- Organizer
  CosPA 2024
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] Cosmic birefringence tomography and angle calibration requirement2024
- Author(s)
  並河俊弥
- Organizer
  Calibration workshop
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] Cosmic birefringence tomography2024
- Author(s)
  並河俊弥
- Organizer
  iTHEMS Cosmology Forum
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] 時間変化を考慮した非等方な宇宙複屈折効果の解析2024
- Author(s)
  並河俊弥
- Organizer
  日本天文学会2024年秋季年会
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] Probing time-evolution of isotropic cosmic birefringence by ALPs2024
- Author(s)
  並河俊弥
- Organizer
  IFPU Focus week
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] Tomography of Anisotropic Cosmic Birefringence2024
- Author(s)
  並河俊弥
- Organizer
  Parity Violation at Home
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] New Probe of Inflationary Gravitational Waves: Cross-Correlations of Lensed Primary CMB B-Modes with Large-Scale Structure2023
- Author(s)
  並河俊弥
- Organizer
  The 14th RESCEU International Symposium
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] New Probe of Inflationary Gravitational Waves: Cross-Correlations of Lensed Primary CMB B-Modes with Large-Scale Structure2023
- Author(s)
  並河俊弥
- Organizer
  第12回観測的宇宙論ワークショップ
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] 銀河前景放射を回避する原始重力波の新たな観測量2023
- Author(s)
  並河俊弥
- Organizer
  日本天文学会
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] A new probe of inflationary gravitational-waves: Cross-correlations of lensed primary B-modes with large-scale structure2023
- Author(s)
  並河俊弥
- Organizer
  CMBxLSS Workshop
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] A quick overview of delensing for large-scale B-modes2022
- Author(s)
  並河俊弥
- Organizer
  Workshop on Weak Gravitational Lensing
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] CMB B-mode delensing for upcoming and future CMB experiments2022
- Author(s)
  並河俊弥
- Organizer
  第１１回観測的宇宙論ワークショップ
- Data Source
  KAKENHI-PROJECT-22K03682
[Presentation] Future detectability of gravitational-wave induced lensing from high-sensitivity CMB experiments2015
- Author(s)
  並河俊弥
- Organizer
  日本天文学会2015年秋季年会
- Place of Presentation
  大阪大学
- Year and Date
  2015-03-19
- Data Source
  KAKENHI-PROJECT-25887033
[Presentation] 不完全な偏光マップからの重力レンズ効果の推定法の開発
- Author(s)
  並河俊弥、Duncan Hanson、高橋龍一
- Organizer
  日本天文学会2013年秋季年会
- Place of Presentation
  東北大学
- Data Source
  KAKENHI-PROJECT-25887033
[Presentation] Delensing the B-mode polarization of LiteBIRD observation with ground-based CMB experiments
- Author(s)
  並河俊弥、永田竜
- Organizer
  第二回観測的宇宙論ワークショップ
- Place of Presentation
  国立天文台三鷹
- Data Source
  KAKENHI-PROJECT-25887033
[Presentation] Delensing B-mode polarization of LiteBIRD observation using ground-based CMB experiments
- Author(s)
  並河俊弥、永田竜
- Organizer
  日本天文学会2014年春季年会
- Place of Presentation
  国際基督教大学
- Data Source
  KAKENHI-PROJECT-25887033

1. NAGATA Ryo

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
2. KOHRI Kazunori

# of Collaborated Projects: 0 results

# of Collaborated Products: 2 results
3. 小幡一平

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results

Namikawa Toshiya 並河 俊弥

NAMIKAWA Toshiya 並河 俊弥

Research Projects

Research Products

Co-Researchers

Improving analysis method for delensing to probe inflationary gravitational wavesPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Cosmology with new analysis methods for cosmic microwave background B-modesPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Developing analysis method for higher-order correlation function to probe inflationary gravitational waves with CMBPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Cosmology from weak gravitational lensing of Cosmic Microwave BackgroundPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] Tomographic constraint on anisotropic cosmic birefringence2025

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Exact CMB B-mode power spectrum from anisotropic cosmic birefringence2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Systematic Effects on Lensing Reconstruction from a Patchwork of CMB Polarization Maps2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] LiteBIRD science goals and forecasts: a full-sky measurement of gravitational lensing of the CMB2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] The Simons Observatory: Combining cross-spectral foreground cleaning with multitracer B-mode delensing for improved constraints on inflation2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] The Atacama Cosmology Telescope: reionization kSZ trispectrum methodology and limits2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Constraining ultralight ALP dark matter in light of cosmic birefringence2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] LiteBIRD science goals and forecasts: improving sensitivity to inflationary gravitational waves with multitracer delensing2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Efficient estimation of rotation-induced bias to reconstructed CMB lensing power spectrum2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Cosmic birefringence tomography with polarized Sunyaev-Zel'dovich effect2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Isotropic cosmic birefringence from early dark energy2023

Namikawa Toshiya 並河俊弥

NAMIKAWA Toshiya 並河俊弥