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Searching for PGWs with CMB exoeriments and their application for time-domain astronomy

Research Project

Project/Area Number 21K03585
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionHigh Energy Accelerator Research Organization (2022-2023)
The University of Tokyo (2021)

Principal Investigator

Chinone Yuji  大学共同利用機関法人高エネルギー加速器研究機構, 量子場計測システム国際拠点, 特任准教授 (90649675)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords観測的宇宙論 / 観測 / データ解析 / マイクロ波観測 / 電波 / ダークマター / CMB / 解析 / アクシオン / 暗黒物質 / 宇宙マイクロ波背景放射 / 背景放射 / 宇宙論 / 重力波 / インフレーション / 時間軸天文学 / 原始重力波
Outline of Research at the Start

本研究の目的は、最新のSimons Array実験により、宇宙のインフレーションの際に生成される時空のさざ波である原始重力波を、宇宙マイクロ波背景放射(CMB)に刻まれる特殊な渦状の偏光パターン「Bモード」によって精密に観測することである。特に原始重力波の振幅が最も大きくなる約2度角以上の大角度スケールで検出することで、宇宙の「はじまり」の解明につなげる。また、CMB観測の広い天域を、長時間にわたり、高い頻度で観測する特徴を活用することで、マイクロ波帯での時間軸天文学を開拓することである。

Outline of Final Research Achievements

Observations of the Cosmic Microwave Background (CMB) were taken using the Simons Array, and data analysis was performed. At present, detection of B-modes from primordial gravitational waves have not been achieved, and further high-sensitivity experiments are essential. By using the observational data from the POLARBEAR experiment, we updated the upper limits of the tensor-to-scalar ratio that POLARBEAR had reported. In addition, we constructed an analytical method to limit axion-like particles from the time-varying polarization angle and analyzed the CMB data observed by POLARBEAR and TauA (Crab Nebula) data. As a result, we achieved the most stringent limits with this type of method (limiting the mass of axion-like particles to the range of (10^{-22}-10^{-18}) eV, based on the limits from TauA).

Academic Significance and Societal Importance of the Research Achievements

Simons Arrayではインフレーション起源信号を検出する感度を実現できなかったが、半波長板による偏光変調の実証に有効だった。これまで注目されていなかった宇宙マイクロ波背景放射 (CMB)観測実験によるマイクロ波観測データの時間軸の情報を使うことで、アクシオン類似粒子を探査できることを示した。特にCMBおよびTauA (蟹星雲)のデータを解析したの本研究が初めてである。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (22 results)

All 2023 2022 2021 Other

All Int'l Joint Research (9 results) Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 6 results)

  • [Int'l Joint Research] UCB/UCSD/LBNL(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] APC(フランス)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] SISSA(イタリア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] UCB/UCSD/LBNL(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] APC(フランス)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] SISSA(イタリア)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] UC Berkeley/UCSD/LBNL(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] パリ・ディドロ大学/CNRS(フランス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] SISSA/INFN(イタリア)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Constraints on axionlike polarization oscillations in the cosmic microwave background with POLARBEAR2023

    • Author(s)
      The POLARBEAR collaboration, Y. Chinone and, et al,.
    • Journal Title

      Physical Review D

      Volume: 108 Issue: 4 Pages: 043017-043017

    • DOI

      10.1103/physrevd.108.043017

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Improved Upper Limit on Degree-scale CMB B-mode Polarization Power from the 670 Square-degree POLARBEAR Survey2022

    • Author(s)
      The POLARBEAR collaboration, and Y. Chinone et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 931 Issue: 2 Pages: 101-101

    • DOI

      10.3847/1538-4357/ac6809

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] CMB-S4: Forecasting Constraints on Primordial Gravitational Waves2022

    • Author(s)
      Kevork Abazajian et al.
    • Journal Title

      ApJ

      Volume: 926 Issue: 1 Pages: 54-54

    • DOI

      10.3847/1538-4357/ac1596

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Improved upper limit on degree-scale CMB B-mode polarization power from the 670 square-degree Polarbear survey2022

    • Author(s)
      The POLARBEAR collaboration
    • Journal Title

      ApJ

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Polarbear実験によるCMB偏光の振動を用いたAxionへの制限2023

    • Author(s)
      茅根裕司
    • Organizer
      日本物理学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Polarbear実験によるCMB偏光を用いたAxion探査の現状2023

    • Author(s)
      茅根裕司
    • Organizer
      日本天文学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 宇宙論的観測の現状と将来II -CMB-, 高精度・大統計の宇宙論データで探る重力理論2022

    • Author(s)
      茅根裕司
    • Organizer
      日本物理学会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 最新・次世代マイクロ波望遠鏡群による広天域・高精度・高頻度偏光観測と素粒子・宇宙論2022

    • Author(s)
      茅根裕司
    • Organizer
      大型サブミリ波望遠LSTセミナー
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] The past, present, and future of the search for primordial gravitational waves from cosmic inflation with CMB experiments in the Atacama desert and space2022

    • Author(s)
      茅根裕司
    • Organizer
      The 9th Korea-Japan Workshop on Dark Energy
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Synergies between ALMA/LST and wide-field high-cadence CMB surveys2022

    • Author(s)
      茅根裕司
    • Organizer
      Synergies between ALMA and wide-field high-cadence multi-wavelength surveys
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Synergies between ALMA/LST and wide-field high-cadence CMB surveys2022

    • Author(s)
      Yuji Chinone
    • Organizer
      Synergies between ALMA and wide-field high-cadence multi-wavelength surveys
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 次世代地上実験による広天域・高精度・高頻度CMB 偏光観測と将来の素粒子・宇宙論解析2022

    • Author(s)
      茅根裕司
    • Organizer
      Upcoming CMB Observations & Cosmology
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] インフレーション起源Bモード検出に向けたE/Bモード分手法の開発2021

    • Author(s)
      茅根裕司
    • Organizer
      日本天文学会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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