On the migration of planetasimals in the protosolar nebula investigated based on the inhomogeneity of cometary nuclei

• Project/Area Number: 19740107
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Astronomy
• Research Institution: Kyoto Sangyo University
• Principal Investigator: KAWAKITA hideyo Kyoto Sangyo University, 理学部, 准教授 (70356129)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,540,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥240,000); Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2007: ¥2,500,000 (Direct Cost: ¥2,500,000)
• Keywords: 彗星 / 太陽系 / 原始太陽系円盤 / 惑星形成

Research Abstract

本研究は、太陽系の化石とも呼べる彗星(始原天体)に含まれる化学組成比を元にして、私たちの太陽系のもととなった物質を探ることを主眼にしている。本研究では多数の破片に分裂したシュバスマン・バハマン第3彗星の観測を元に、もともとの彗星核に内在していた非均質性について議論した。その結果、彗星核は非常に均質であり、原始太陽系円盤内での微惑星の動径方向移動はあまり顕著ではなかったのではないかという結論に達した。また、その他の彗星についても、近赤外線高分散分光観測を多数実施し、その統計的性質に迫った。その結果、従来提案されているような単純な分類では不十分であることを明らかにした。

Research Products

• [Journal Article] Formation Condition of Icy Materials in Comet C/2004Q2 (Machholz) (2009)
  • Author(s): H. Kawakita & H. Kobayashi
  • Journal Title: Astrophysical Journal 693 Pages: 388-396
  • Peer Reviewed
• [Journal Article] Formation Conditions of Icy Materials in Comet C/2004Q2 (2009)
  • Author(s): Kawakita, H.
  • Journal Title: Asrtophysical Journal 693 Pages: 388-369
  • Peer Reviewed
• [Journal Article] Optical Spectroscopic Observations of Fragments B and C of Comet 73P/Schwassmann-Wachmann 3 (2008)
  • Author(s): Kanda, Y., Mori, A., Kawakita, H., Kobayashi, H.
  • Journal Title: Publication of Astronomical Society of Japan 60 Pages: 1191-1198
  • Peer Reviewed
• [Journal Article] IRCS/Subaru observations of water in the inner coma of Comet 73P-B/Schwassmann Wachmann 3 : Spatially resolved rotational temperatures and ortho para ratios (2008)
  • Author(s): Bonev, B., Mumma, M., Kawakita, H., et al.
  • Journal Title: Icarus 196 Pages: 241-248
  • Peer Reviewed
• [Journal Article] Optical Spectroscopic Observations of Comet 73P/Schwassmann-Wachmann 3 (2008)
  • Author(s): Kanda, Y.
  • Journal Title: Publication of Astronomical Soc. of Japan 60 Pages: 1191-1198
  • Peer Reviewed
• [Journal Article] IRCS/Subaru observations of water in the inner coma of Comet 73P-B/Schwassmann Wachmann 3 : Spatially resolved rotational temperatures and ortho para ratios (2008)
  • Author(s): Bonev, B.
  • Journal Title: Icarus 196 Pages: 241-248
  • Peer Reviewed
• [Journal Article] IRCS/Subaru Observations of Water in the Inner Coma of Comet 73P-B/Schwassmann-Wachmann 3: Spatially Resolved Rotational Tempmperatures and Ortho-Para Ratios (2008)
  • Author(s): Bonev, B., et. al.
  • Journal Title: Icarus (印刷中)
  • Peer Reviewed
• [Journal Article] Organic Volatiles in Comet 73P-B/Schwassmann-Wachmann 3 Observed during Its Outburst : A Clue to the Formation Region of the Jupiter-Family Comets (2007)
  • Author(s): Kobayashi, H., Kawakita, H., Mumma, M., et al.
  • Journal Title: Astrophysical Journal 668 Pages: 75-78
  • Peer Reviewed
• [Journal Article] Organic Volatiles in Comet 73P-B/Schwassmann-Wachmann 3 Observed during Its Outburst: A Clue to the Formation Region of the Jupiter-Family Comets (2007)
  • Author(s): Kobayashi, H., et. al.
  • Journal Title: Astrophysical Journal, Letter 668 Pages: 75-78
  • Peer Reviewed
• [Journal Article] The Thickness and Formation Age of the Surface Layer on Comet 9P/Tempel 1 (2007)
  • Author(s): Kadono, T., et. al.
  • Journal Title: Astrophysical Journal, Letter 661 Pages: 89-92
  • Peer Reviewed
• [Journal Article] Grain properties of Oort cloud comets: Modeling the mineralogical composition of cometary dust from mid-infrared emission features (2007)
  • Author(s): Ootsubo, T., et. al.
  • Journal Title: Planetary and Space Science 55 Pages: 1044-1049
  • Peer Reviewed
• [Journal Article] Imaging polarimetry of Comet 9P/Tempel before and after the Deep Impact (2007)
  • Author(s): Furusho, R., et. al.
  • Journal Title: Icarus 190 Pages: 454-458
  • Peer Reviewed
• [Presentation] High Dispersion Near-infrared Spectra of Comet C/2004 Q2 (Machholz) By Keck-II/ NIRSPEC : Organic Chemistry, Nuclear Spin Temperatures and D/H Ratio (2008)
  • Author(s): Kawakita, H
  • Organizer: Americal Astronomical Society
  • Place of Presentation: Ithaca/NY/U. S. A.
  • Year and Date: 2008-10-11
• [Presentation] High-dispersion Spectroscopic Observations Of 8P/Tuttle With VLT/CRIRES (2008)
  • Author(s): Kobayashi, H.
  • Organizer: Americal Astronomical Society
  • Place of Presentation: Ithaca/NY/U. S. A.
  • Year and Date: 2008-10-11
• [Presentation] High-dispersion Spectroscopic Observations Of Comet C/2001 Q4 (neat) In Optical And Near-infrared RegionsAmerical Astronomical Society (2008)
  • Author(s): Onishi, R.
  • Organizer: Americal Astronomical Society
  • Place of Presentation: Ithaca/NY/U. S. A.
  • Year and Date: 2008-10-11
• [Presentation] Optical Spectroscopic Observations of Fragments B and C of Comet 73P/S chwassmann-Wachmann 3 (2008)
  • Author(s): Kanda, Y.
  • Organizer: Americal Astronomical Society
  • Place of Presentation: Ithaca/NY/U. S. A.
  • Year and Date: 2008-10-11
• [Presentation] High Dispersion Near-infrared Spectra of Comet C/2004 Q2 (Machholz) By Keck-II/NIRSPEC : Organic Chemistry, Nuclear Spin Temperatures and D/H Ratio (2008)
  • Author(s): H. Kawakita, H. Kobayashi
  • Organizer: Americal Astronomical Society
  • Place of Presentation: Ithaca/NY/U.S.A.
• [Presentation] High-dispersion Spectroscopic Observations Of 8P/Tuttle With VLT/CRIRESAmerical (2008)
  • Author(s): H. Kobayashi, H. Kawakita, et al.
  • Organizer: Astronomical Society
  • Place of Presentation: Ithaca/NY/U.S.A.
• [Presentation] High-dispersion Spectroscopic Observations Of Comet C/2001 Q4 (neat) In Optical And Near-infrared Regions (2008)
  • Author(s): R. Onishi, Y. Shinnaka, H. Kobayashi, H. Kawakita
  • Organizer: Americal Astronomical Society
  • Place of Presentation: Ithaca/NY/U.S.A.
• [Presentation] Optical Spectroscopic Observations of Fragments B and C of Comet 73P/Schwassmann-Wachmann 3 (2008)
  • Author(s): Y. Kanda, A. Mori, H. Kawakita, H. Kobayashi
  • Organizer: Americal Astronomical Society
  • Place of Presentation: Ithaca/NY/U.S.A.
• [Presentation] Near-infrared High Dispersion Spectroscopy Of Comet C/2004 Q2 (Machholz) : Ortho-to-Para Ratio Of Water And D/H Ratio Of Methane (2007)
  • Author(s): H. Kawakita & H. Kobayashi
  • Organizer: Astronomical Society
  • Place of Presentation: Orlando/Frorida/U.S.A.
• [Presentation] Organic Volatiles in Comet 73P-B/Schwassmann-Wachmann 3 Observed during Its Outburst : A Clue to the Formation Region of the Jupiter-Family Comets (2007)
  • Author(s): H. Kobayashi, H. Kawakita, et al.
  • Organizer: Astronomical Society
  • Place of Presentation: Orlando/Frorida/U.S.A.
• [Presentation] Near-infrared High Dispersion Spectroscopy Of Comet C/2004 Q2 (Machholz): Ortho-to-Para Ratio Of Water And D/H Ratio Of Methane (2007)
  • Author(s): Kawakita, H.
  • Organizer: American Astronomical Society
  • Place of Presentation: Univ Center of Florida, Oolando, Frorida, U.S.A.
• [Presentation] Organic Volaties in Comet 73P-B/Schwassmann-Wachmann 3 Observed during Its Outburst: A Clue to the Formation Region of the Jupiter-Family Comets (2007)
  • Author(s): Kobayashi, H., et. al.
  • Organizer: American Astronomical Society
  • Place of Presentation: Univ Center of Florida, Oolando, Frorida, U.S.A.