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重力マイクロレンズ法による惑星存在頻度の主星質量依存性及び惑星質量関数の解明

Research Project

Project/Area Number 20J20633
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Review Section Basic Section 16010:Astronomy-related
Research InstitutionOsaka University

Principal Investigator

近藤 依央菜  大阪大学, 理学研究科, 特別研究員(DC1)

Project Period (FY) 2020-04-24 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2022: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2021: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2020: ¥1,100,000 (Direct Cost: ¥1,100,000)
Keywords太陽系外惑星 / 赤外線天文学 / 銀河系中心 / 系外惑星 / 重力マイクロレンズ / 赤外線
Outline of Research at the Start

本研究は、重力マイクロレンズ法によって発見されたスノーラインの外側に位置する太陽系外惑星を用いて、主星質量ごとに惑星質量比分布を求め、その主星質量依存性を解明することで惑星形成論に制限を与えることである。

Outline of Annual Research Achievements

本年度は新しい近赤外線望遠鏡によるマイクロレンズ探査の惑星発見数とマイクロレンズイベント検出数の見積もりを行い、観測戦略の最適化に貢献した。PRIME(PRime-focus Infrared Microlensing Experiment)望遠鏡は世界で初めて近赤外線でマイクロレンズ系外惑星探査を行う。近赤外線では、従来の可視光では不可能だった星間減光が強い銀河系中心近くの星数密度の高い領域を観測可能である。PRIMEによるマイクロレンズ探査の主要目的は、銀河系中心付近のイベントレートを測定し、将来のRoman宇宙望遠鏡の観測戦略最適化への貢献と、世界で初めての銀河系中心付近での惑星存在頻度分布の測定である。銀河系中心方向に最適化された銀河系モデルを使用してPRIMEのマイクロレンズ観測をシミュレーションを行い、惑星発見数と発見できる惑星の質量範囲を異なる観測戦略で見積もった。その結果、PRIMEは1年間で42-52個の惑星(惑星質量が1地球質量以下が1-2個、1-100地球質量では22-25個、100-10000地球質量では19-25個)を発見できることが分かった。このシミュレーションの結果はPRIME望遠鏡の最初の観測戦略の選定に役立ち、また実際の観測結果と比較することで使用した銀河系モデルや仮定した惑星存在頻度分布等に制限を与えられると期待できる。この解析経過及び結果を5月にラスベガスで行われた国際会議Exoplanet IVと、9月にパリで行われた25th Microlensing Conferenceで報告した。また2022年11月に投稿論文をAstronomical Journalへ投稿した。

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。

Report

(3 results)
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (52 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (14 results) Journal Article (34 results) (of which Int'l Joint Research: 34 results,  Peer Reviewed: 34 results,  Open Access: 33 results) Presentation (4 results) (of which Int'l Joint Research: 3 results)

  • [Int'l Joint Research] Massey University/University of Auckland/Mt. John Observatory(ニュージーランド)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] NASA Goddard Space Flight Center/CfA | Harvard & Smithsonian/University of Maryland(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Max Planck Institute for Astronomy/Universitat Hamburg/Astronomisches Rechen- Institute(ドイツ)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Warsaw University Observatory/Nicolaus Copernicus University(ポーランド)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Kyung Hee University/University of Science and Technology/Chungbuk National University(韓国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Massey University/University of Auckland/Mt. John Observatory(ニュージーランド)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] NAS Goddard Space Flight Center/University of Maryland(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Massey University/University of Auckland/Mt. John Observatory(ニュージーランド)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] NASA Goddard Space Flight Center/CfA | Harvard & Smithsonian/University of Maryland(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Max Planck Institute for Astronomy/Universitat Hamburg/Astronomisches Rechen-Institute(ドイツ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Warsaw University Observatory/Nicolaus Copernicus University(ポーランド)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Kyung Hee University/University of Science and Technology/Chungbuk National University(韓国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research]

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Mass Production of 2021 KMTNet Microlensing Planets. III. Analysis of Three Giant Planets2023

    • Author(s)
      Shin, In-Gu; Yee, Jennifer C.; Gould, Andrew and Suzuki, Daisuke et al.
    • Journal Title

      The Astronomical Journal

      Volume: 165 Issue: 1 Pages: 8-8

    • DOI

      10.3847/1538-3881/ac9d93

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] KMT-2021-BLG-1077L: The fifth confirmed multiplanetary system detected by microlensing2022

    • Author(s)
      Han, Cheongho; Gould, Andrew; Bond, Ian A. and Suzuki, Daisuke et al.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 662 Pages: A70-A70

    • DOI

      10.1051/0004-6361/202243550

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] OGLE-2016-BLG-1093Lb: A Sub-Jupiter-mass Spitzer Planet Located in the Galactic Bulge2022

    • Author(s)
      Shin, In-Gu; Yee, Jennifer C.; Hwang, Kyu-Ha and Suzuki, Daisuke et al.
    • Journal Title

      The Astronomical Journal

      Volume: 163 Issue: 6 Pages: 254-254

    • DOI

      10.3847/1538-3881/ac6513

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Supplement: “An Isolated Mass-gap Black Hole or Neutron Star Detected with Astrometric Microlensing” (2022, ApJL, 933, L23)2022

    • Author(s)
      Lam Casey Y., et al.
    • Journal Title

      The Astrophysical Journal Supplement Series

      Volume: 260 Issue: 2 Pages: 55-55

    • DOI

      10.3847/1538-4365/ac7441

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Precision measurement of a brown dwarf mass in a binary system in the microlensing event. OGLE-2019-BLG-0033/MOA-2019-BLG-0352022

    • Author(s)
      Herald, A. ; Udalski, A. ; Bozza, V. and Suzuki, D. et al.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 663 Pages: A100-A100

    • DOI

      10.1051/0004-6361/202243490

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An Isolated Stellar-mass Black Hole Detected through Astrometric Microlensing2022

    • Author(s)
      Sahu, Kailash C.; Anderson, Jay; Casertano, Stefano and Suzuki, Daisuke et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 933 Issue: 1 Pages: 83-83

    • DOI

      10.3847/1538-4357/ac739e

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An Isolated Mass-gap Black Hole or Neutron Star Detected with Astrometric Microlensing2022

    • Author(s)
      Lam, Casey; Y. Lu, Jessica R.; Udalski, Andrzej and Suzuki, Daisuke et al.
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 933 Issue: 1 Pages: L23-L23

    • DOI

      10.3847/2041-8213/ac7442

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Systematic KMTNet planetary anomaly search. V. Complete sample of 2018 prime-field2022

    • Author(s)
      Gould, Andrew; Han, Cheongho; Zang, Weicheng and Suzuki Daisuke et al.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 664 Pages: A13-A13

    • DOI

      10.1051/0004-6361/202243744

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Four sub-Jovian-mass planets detected by high-cadence microlensing surveys2022

    • Author(s)
      Han, Cheongho; Kim, Doeon; Gould, Andrew and Suzuki, Daisuke et al.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 664 Pages: A33-A33

    • DOI

      10.1051/0004-6361/202243484

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] OGLE-2018-BLG-0799Lb: a q ~ 2.7 × 10^-3 planet with Spitzer parallax2022

    • Author(s)
      Zang, Weicheng; Shvartzvald, Yossi; Udalski, Andrzej and Suzuki, Daisuke et al.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 514 Issue: 4 Pages: 5952-5968

    • DOI

      10.1093/mnras/stac1631

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] MOA-2019-BLG-008Lb: A New Microlensing Detection of an Object at the Planet/Brown Dwarf Boundary2022

    • Author(s)
      Bechelet, E.; Tsapras, Y. ; Gould, Andrew; Suzuki, Daisuke et al.
    • Journal Title

      The Astronomical Journal

      Volume: 164 Issue: 3 Pages: 75-75

    • DOI

      10.3847/1538-3881/ac78ed

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] MOA-2020-BLG-135Lb: A New Neptune-class Planet for the Extended MOA-II Exoplanet Microlens Statistical Analysis2022

    • Author(s)
      Ishitani Silva, Stela; Ranc, Clement; Bennett, David P. and Suzuki, Daisuke et al.
    • Journal Title

      The Astronomical Journal

      Volume: 164 Issue: 3 Pages: 118-118

    • DOI

      10.3847/1538-3881/ac82b8

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] KMT-2021-BLG-0171Lb and KMT-2021-BLG-1689Lb: two microlensing planets in the KMTNet high-cadence fields with followup observations2022

    • Author(s)
      Yang, Hongjing; Zang, Weicheng; Gould, Andrew and Suzuki, Daisuke et al.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 516 Issue: 2 Pages: 1894-1909

    • DOI

      10.1093/mnras/stac2023

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Brown dwarf companions in microlensing binaries detected during the 2016-2018 seasons2022

    • Author(s)
      Han, Cheongho; Ryu, Yoon-Hyun; Shin, In-Gu and Suzuki, Daisuke et al.
    • Journal Title

      Astronomy & Astrophysics

      Volume: 667 Pages: A64-A64

    • DOI

      10.1051/0004-6361/202244186

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Asteroid Lightcurves from the MOA-II Survey: A pilot study2022

    • Author(s)
      Cordwell A J., et al.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 674 Issue: 2 Pages: 1-1

    • DOI

      10.1093/mnras/stac674

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] OGLE-2014-BLG-0319: A Sub-Jupiter-mass Planetary Event Encountered Degeneracy with Different Mass Ratios and Lens-source Relative Proper Motions2022

    • Author(s)
      Miyazaki Shota, et al.
    • Journal Title

      The Astronomical Journal

      Volume: 163 Issue: 3 Pages: 123-123

    • DOI

      10.3847/1538-3881/ac4960

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Systematic KMTNet Planetary Anomaly Search. II. Six New q &lt; 2 × 10<sup>?4</sup> Mass-ratio Planets2022

    • Author(s)
      Hwang Kyu-Ha, et al.
    • Journal Title

      The Astronomical Journal

      Volume: 163 Issue: 2 Pages: 43-43

    • DOI

      10.3847/1538-3881/ac38ad

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] KMT-2021-BLG-0912Lb: a microlensing super Earth around a K-type star2022

    • Author(s)
      Han Cheongho, et al.
    • Journal Title

      Astronomy &amp; Astrophysics

      Volume: 658 Pages: A94-A94

    • DOI

      10.1051/0004-6361/202142495

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf2021

    • Author(s)
      Kondo Iona et al.
    • Journal Title

      The Astronomical Journal

      Volume: 162 Issue: 2 Pages: 77-77

    • DOI

      10.3847/1538-3881/ac00ba

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An Earth-mass planet in a time of COVID-19: KMT-2020-BLG-0414Lb2021

    • Author(s)
      Zang Weicheng, et al.
    • Journal Title

      Research in Astronomy and Astrophysics

      Volume: 21 Issue: 9 Pages: 239-239

    • DOI

      10.1088/1674-4527/21/9/239

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] OGLE-2019-BLG-0960 Lb: the Smallest Microlensing Planet2021

    • Author(s)
      Yee Jennifer C., et al.
    • Journal Title

      The Astronomical Journal

      Volume: 162 Issue: 5 Pages: 180-180

    • DOI

      10.3847/1538-3881/ac1582

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] KMT-2021-BLG-0322: Severe degeneracy between triple-lens and higher-order binary-lens interpretations2021

    • Author(s)
      Han Cheongho, et al.
    • Journal Title

      Astronomy &amp; Astrophysics

      Volume: 655 Pages: A24-A24

    • DOI

      10.1051/0004-6361/202141939

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Systematic KMTNet Planetary Anomaly Search. I. OGLE-2019-BLG-1053Lb, a Buried Terrestrial Planet2021

    • Author(s)
      Zang Weicheng, et al.
    • Journal Title

      The Astronomical Journal

      Volume: 162 Issue: 4 Pages: 163-163

    • DOI

      10.3847/1538-3881/ac12d4

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] New giant planet beyond the snow line for an extended MOA exoplanet microlens sample2021

    • Author(s)
      Ranc Clement, et al.
    • Journal Title

      Monthly Notices of the Royal Astronomical Society

      Volume: 506 Issue: 1 Pages: 1498-1506

    • DOI

      10.1093/mnras/stab1787

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] KMT-2019-BLG-0371 and the Limits of Bayesian Analysis2021

    • Author(s)
      Kim Yun Hak, et al.
    • Journal Title

      The Astronomical Journal

      Volume: 162 Issue: 1 Pages: 17-17

    • DOI

      10.3847/1538-3881/abf930

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] KMT-2019-BLG-1715: Planetary Microlensing Event with Three Lens Masses and Two Source Stars2021

    • Author(s)
      Han Cheongho, et al.
    • Journal Title

      The Astronomical Journal

      Volume: 161 Issue: 6 Pages: 270-270

    • DOI

      10.3847/1538-3881/abf4d0

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] OGLE-2017-BLG-1049: Another Giant Planet Microlensing Event2020

    • Author(s)
      Kim Yun Hak、et al.
    • Journal Title

      Journal of the Korean Astronomical Society

      Volume: 53 Pages: 161-168

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] KMT-2019-BLG-0842Lb: A Cold Planet below the Uranus/Sun Mass Ratio2020

    • Author(s)
      Jung Youn Kil、Udalski Andrzej、Zang Weicheng、et al.
    • Journal Title

      The Astronomical Journal

      Volume: 160 Issue: 6 Pages: 255-255

    • DOI

      10.3847/1538-3881/abbe93

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] OGLE-2018-BLG-1269Lb: A Jovian Planet with a Bright I = 16 Host2020

    • Author(s)
      Jung Youn Kil、Gould Andrew、Udalski Andrzej, et al.
    • Journal Title

      The Astronomical Journal

      Volume: 160 Issue: 3 Pages: 148-148

    • DOI

      10.3847/1538-3881/abacc8

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] OGLE-2017-BLG-0406: Spitzer Microlens Parallax Reveals Saturn-mass Planet Orbiting M-dwarf Host in the Inner Galactic Disk2020

    • Author(s)
      Hirao Yuki、Bennett David P.、Ryu Yoon-Hyun、 et al.
    • Journal Title

      The Astronomical Journal

      Volume: 160 Issue: 2 Pages: 74-74

    • DOI

      10.3847/1538-3881/ab9ac3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Gas Giant Planet in the OGLE-2006-BLG-284L Stellar Binary System2020

    • Author(s)
      Bennett David P.、Udalski Andrzej、Bond Ian A. et al.
    • Journal Title

      The Astronomical Journal

      Volume: 160 Issue: 2 Pages: 72-72

    • DOI

      10.3847/1538-3881/ab9cb9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] One Planet or Two Planets? The Ultra-sensitive Extreme-magnification Microlensing Event KMT-2019-BLG-19532020

    • Author(s)
      Han Cheongho、Kim Doeon、Jung Youn Kil、et al.
    • Journal Title

      The Astronomical Journal

      Volume: 160 Issue: 1 Pages: 17-17

    • DOI

      10.3847/1538-3881/ab91ac

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Wide-orbit Exoplanet OGLE-2012-BLG-0838Lb2020

    • Author(s)
      Poleski R.、Suzuki Daisuke、et al.
    • Journal Title

      The Astronomical Journal

      Volume: 159 Issue: 6 Pages: 261-261

    • DOI

      10.3847/1538-3881/ab8a49

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Candidate Brown-dwarf Microlensing Events with Very Short Timescales and Small Angular Einstein Radii2020

    • Author(s)
      Han Cheongho、et al.
    • Journal Title

      The Astronomical Journal

      Volume: 159 Issue: 4 Pages: 134-134

    • DOI

      10.3847/1538-3881/ab6f66

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Prediction of the Planet Detection Rates by the PRIME Microlensing Survey2022

    • Author(s)
      I. Kondo et al.
    • Organizer
      25th international microlensing conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Predicted Planet Yields for the PRime-focus Infrared Microlensing Experiment (PRIME)2022

    • Author(s)
      I. Kondo et al.
    • Organizer
      Exoplanets IV Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spitzer 宇宙望遠鏡を用いたスペースパララックス効果 による重力マイクロレンズイベントの質量決定2020

    • Author(s)
      近藤依央菜
    • Organizer
      日本天文学会2020年秋季年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] OGLE-2018-BLG-1185: A Microlensing Super-earth Orbiting a Late M-dwarf in the Galactic bulge2020

    • Author(s)
      I. Kondo et al.
    • Organizer
      Exoplanets III
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research

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Published: 2020-07-07   Modified: 2024-03-26  

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