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Search for new celestial objects using microlensing effect

Research Project

Project/Area Number 14002006
Research Category

Grant-in-Aid for Specially Promoted Research

Allocation TypeSingle-year Grants
Review Section Physics
Research InstitutionNagoya University

Principal Investigator

MURAKI Yasushi  Nagoya University, Solar-Terrestrial Environment Laboratory, Emeritus Professor, 名誉教授 (70013430)

Co-Investigator(Kenkyū-buntansha) YOSHITAKA Ito  Solar-Terrestrial Environment Laboratory, Professor, 太陽地球環境研究所, 教授 (50272521)
ABEFUMIO Fumio  Nagoya University, Solar-Terrestrial Environment Laboratory, Associate Professor, 太陽地球環境研究所, 助教授 (80184224)
MASUDA Kimiaki  Nagoya University, Solar-Terrestrial Environment Laboratory, Associate Professor, 太陽地球環境研究所, 助教授 (40173744)
MATSUBARA Yutaka  Nagoya University, Solar-Terrestrial Environment Laboratory, Associate Professor, 太陽地球環境研究所, 助教授 (80202323)
SUMI Takahiro  Nagoya University, Solar-Terrestrial Environment Laboratory, Resarch Associate, 太陽地球環境研究所, 助手 (30432214)
さこ 隆志  名古屋大学, 太陽地球環境研究所, 助手 (90324368)
Project Period (FY) 2002 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥562,900,000 (Direct Cost: ¥433,000,000、Indirect Cost: ¥129,900,000)
Fiscal Year 2006: ¥39,000,000 (Direct Cost: ¥30,000,000、Indirect Cost: ¥9,000,000)
Fiscal Year 2005: ¥39,000,000 (Direct Cost: ¥30,000,000、Indirect Cost: ¥9,000,000)
Fiscal Year 2004: ¥84,500,000 (Direct Cost: ¥65,000,000、Indirect Cost: ¥19,500,000)
Fiscal Year 2003: ¥280,800,000 (Direct Cost: ¥216,000,000、Indirect Cost: ¥64,800,000)
Fiscal Year 2002: ¥119,600,000 (Direct Cost: ¥92,000,000、Indirect Cost: ¥27,600,000)
Keywordsgravitational lensing / extrasolar planet / dark matter / extrasolar terrestrial planet / planetary science / large telescope / MACHO / Large CCD camera / ダークマタター / ブラックホール / 恒星
Research Abstract

The main goals of the MOA project are the search for non-luminous astrophysical objects comprising a significant fraction of dark matter of the Galaxy, and also the search for Earth-like planets orbiting distant stars in the Galaxy. The phenomenon of gravitational microlensing offers a practical procedure for carrying out both these goals. To accomplish the goals, a wide-field optical telescope of diameter 1.8m was assembled in Japan during 2003. A telescope dome of diameter 8m, and a large CCD camera with 80 million pixels, were also fabricated in Japan at the same time. During 2004, the telescope, dome and camera were installed at the Mt. John Observatory of the University of Canterbury in New Zealand. First light occurred on March 1^<st> 2005.
Main results: the first clear discovery of an extra-solar planet by gravitational microlensing occurred in July 2003. The discovery was made jointly by the MOA and OGLE groups. Additional measurements were subsequently made by the Hubble Space Telescope. The planet discovered in this event is similar to Jupiter.
Its mass is 2.6 times that of Jupiter, and it orbits a star of 0.63 solar mass at an orbital radius of 4.3 AU.
Another Jovian mass planet was found in March 2005. This discovery was made in a microlensing event of high magnification in collaboration with the OGLE, MicroFUN and PLANET/Robonet groups. During April 2005, a Neptune-like planet was found in an event of high magnification in collaboration with the OGLE and MicroFUN groups. Finally, in August 2005, an Earth-like planet was found in collaboration with the PLANET and OGLE/Robonet groups. The latter discoveries imply that our solar system is not a lonely system in our Galaxy

Report

(6 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (45 results)

All 2007 2006 2005 2004 2003 Other

All Journal Article (29 results) Book (1 results) Publications (15 results)

  • [Journal Article] Detecting Earth-like Extra-solar Planets from Antarctica By Gravitational Microlensing2007

    • Author(s)
      Yock, P
    • Journal Title

      Chinese Academy and Astrophysics 31

      Pages: 101-108

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Discovery of a cool planet of 5.5 Earth masses through gravitational microlensing2006

    • Author(s)
      Beaulieu, J-P(他72名)
    • Journal Title

      Nature 439

      Pages: 437-440

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Discovery of a cool planet of 5.5 Earth masses through gravitational microlensing2006

    • Author(s)
      Beaulieu, J.-P.;, 72 coauthors
    • Journal Title

      Nature Volume 439, Issue 7075

      Pages: 437-440

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Discovery of a cool planet of 5. 5 Earth masses through gravitational microlensing2006

    • Author(s)
      Beaulieu, J-P 他72名
    • Journal Title

      Nature 439

      Pages: 437-417

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Microlensing OGLE-2005-BLG 169 Implies Cool Neptune-Like Exoplanets Are Common2006

    • Author(s)
      Gould, A 他33名
    • Journal Title

      Astrophysical Journal Letters 644

    • Related Report
      2006 Annual Research Report
  • [Journal Article] The Quest for New Earths2006

    • Author(s)
      Bond, I 他4名
    • Journal Title

      New Zealand Geographics 81

      Pages: 76-85

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Identification of the OGLE-2003-BLG-235/MOA-2003-BLG53 Planetary Host Star2006

    • Author(s)
      Bennett, D 他 4名
    • Journal Title

      Astrophysical Journal 47

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 重力マイクロレンズ効果を利用したくらい天体と太陽系外惑星の探索2006

    • Author(s)
      村木 綏
    • Journal Title

      日本物理学会誌 60

      Pages: 943-948

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Discovery of a cool planet of 5.5 Earth masses through gravitational microlensing2006

    • Author(s)
      J.-P.Beaulieu
    • Journal Title

      Nature 439

      Pages: 437-440

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Determination of stellar shape in microlensing event MOA 2002-BLG-332006

    • Author(s)
      N.Rattenbury et al.
    • Journal Title

      Astronomy and Astrophysics 439

      Pages: 645-650

    • Related Report
      2005 Annual Research Report
  • [Journal Article] The large CCD camera of MAO II telescope2006

    • Author(s)
      T.Sako
    • Journal Title

      Proceed. 10^<th> International Gravitational Microlensing Workshop 1

      Pages: 251-270

    • Related Report
      2005 Annual Research Report
  • [Journal Article] A Jovian-Mass-Planet in Microlensing Event OGLE-2005-BLG-0712005

    • Author(s)
      A.Udalski et al.(他32名)
    • Journal Title

      The Astrophysical Journal 628

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 重力マイクロレンズ効果を利用した暗い天体と太陽系外惑星の探索2005

    • Author(s)
      村木 綏
    • Journal Title

      日本物理学会誌 60

      Pages: 943-948

    • NAID

      110002545814

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] A Jovian-Mass Planet in Microlensing Event OGLE -2005-BLG-0712005

    • Author(s)
      Udalski, A.;, 32 coauthors
    • Journal Title

      The Astrophysical Journal Volume 628, Issue 2

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Search for Extra-Solar Planets and Dark Matter by Gravitatinal Microlensin2005

    • Author(s)
      Muraki, Y
    • Journal Title

      BUTSURI Volume 60, No.12

      Pages: 943-948

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] The Three Kinds of Dark Matter2005

    • Author(s)
      Muraki, Y
    • Journal Title

      Kaisei Shuppan

      Pages: 313-313

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] A Jovian-Mass Planet in Microlensing Event OGLE-2005-BLG-0712005

    • Author(s)
      A.Udalski et al.
    • Journal Title

      Astrophys. J 628

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Candidate extra solar planet transits discovered in the microlensing observation2005

    • Author(s)
      F.Abe et al.
    • Journal Title

      Mon. Not. Roy. Astron. Soc. 364

      Pages: 325-334

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Multiple Outbursts of a Cataclysmic Variable in the Globular Cluster M222005

    • Author(s)
      Bond, I.A. 他20名
    • Journal Title

      Astrophys.J 620

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Study of variable stars in the MOA data base : long-period red variables in the Large Magellanic Cloud2004

    • Author(s)
      S.Noda et al.(他29名)
    • Journal Title

      Mon. Not. R. Astron. Soc. 348

      Pages: 1120-1134

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] OGLE-2003-BLG-235/MOA 2003-BLG-53 : A PLANETARY MICROLENSING EVENT2004

    • Author(s)
      I.A.Bond et al.(他31名)
    • Journal Title

      The Astrophysical Journal 606

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Study of variable stars in the MOA data base : long-period red variables in the Large Magellanic Cloud - II. Multiplicity of the period-luminosity relation2004

    • Author(s)
      Noda, S.;, 29 coauthors
    • Journal Title

      Monthly Notices of the Royal Astronomical Society Volume 348, Issue4

      Pages: 1120-1134

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] OGLE 2003-BLG-235/MOA 2003-BLG-53 : A Planetary Microlensing Event2004

    • Author(s)
      Bond, I.A.;and 31 coauthors
    • Journal Title

      The Astrophysical Journal Volume 606,Issue2

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] OGLE2003-BLG-235/MOA2003-BLG-53 : A Planetary Microlensing Event2004

    • Author(s)
      Bond, I.A. 他31名
    • Journal Title

      Astrophys.J 606

    • Related Report
      2004 Annual Research Report
  • [Journal Article] MOA2003-BLG-37 : A Bulge Jerk-Parallax Microlensing Degeneracy2004

    • Author(s)
      Park, B.-C.他27名
    • Journal Title

      Astrophys.J 609

      Pages: 166-166

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Search for Low-Mass Exoplanets by Gravitational Microlensing at High Magnification.2004

    • Author(s)
      Abe, F. 他34名
    • Journal Title

      Science 305

      Pages: 1264-1264

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Potential Direct Single-Star Mass Measurement2004

    • Author(s)
      Ghosh, H. 他62名
    • Journal Title

      Astrophys.J 615

      Pages: 450-450

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Microlensing Optical Depth towards the Galactic Bulge2003

    • Author(s)
      T.Sumi et al.(他29名)
    • Journal Title

      The Astrophysical Journal 227

      Pages: 204-227

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Microlensing Optical Depth toward the Galactic Bulge from Microlensing Observations in Astrophysics Group Observations during 2000 with Difference Image Analysis2003

    • Author(s)
      Sumi, T.;, 29 coauthors
    • Journal Title

      The Astrophysical Journal Volume227, Issue 1

      Pages: 204-227

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Book] 3つのダークマター2005

    • Author(s)
      村木 綏
    • Total Pages
      313
    • Publisher
      開成出版
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Publications] Muraki, Y.: "The New MOA Project"Proceedings of Conference on Cosmic Rays and Dark Matter,28-30 July,2003,Nagoya. (In press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Yock, P.: "Highlights of MOA Observations"Proceedingsgs of Conference on Cosmic Rays and Dark Matter,28-30 July,2003,Nagoya. (In press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Muraki, Y.: "Search for Dark Stars by the Micro-Gravitational lens method : New MOA Project"Gravitational Microlensing Workshop 2004,17-19 January, Honolulu, Hawaii. 419 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Abe, F.: "New Microlensing Observation Network"Gravitational Microlensing Workshop 2004,17-19 January, Honolulu, Hawaii. 439 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sako, T.: "Current Satatus of the MOA 1.8m telescope Prime Focus Camera"Gravitational Microlensing Workshop 2004,17-19 January, Honolulu, Hawaii. 445 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Abe, F.他32名: "Probing the atmosphere of a solar-like star by galactic microlensing at High magnification"Astoronomy&Astrophysics. 411. L493-L496 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Bayne, G.他17名: "The MOA catalogue of eclipsing binary stars in the Small Magellanic Cloud"Monthly Notices of the Royal Astronomical Society. 331. 609-614 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Bond, I.A., 他21名: "Improving the prospects for detecting extrasolar planets in Gravitational microlensing events in 2002"Monthly Notices of the Royal Astronomical Society. 331. L19-L23 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Bond, LA., 他29名: "Study by MOA of extrasolar planets in gravitational Microlensing Events of high magnification"Monthly Notices of the Royal Astronomical Society. 333. 71-83 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Noda, S 他33名: "Study of variable stars in the MOA data base : long-period red variables in the Large Magellanic Cloud"Monthly Notices of the Royal Astronomical Society. 330. 137-152 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sumi, T 他29名: "Microlensing Optical Depth toward the Galactic Bulge from Microlensing Observation in Astrophysics Group Observations during 2000 with Difference Image Analysis"The Astrophysical Journal. 591. 204-227 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Yasushi Muraki: "Cosmic Rays and Dark Matter"Universal Academy Press, Inc.. 248 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] I.Bond他, MOAグループ: "Study by MOA of extrasolar planets in gravitational microlensing events of high magnification"Monthly Notices of the Royal Astronomical Society. 333. 71B (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] I.Bond他, MOAグループ: "Improving the prospects for detecting extrasolar planets in gravitational microlensing events in 2002"Monthly Notices of the Royal Astronomical Society. 331L. 19B (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.Noda他, MOAグループ: "Study of variable stars in the MOA data base : long-period red variables in the Large Magellanic Cloud"Monthly Notices of the Royal Astronomical Society. 330. 137N (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2018-03-28  

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