小惑星のサイズ分布観測と衝突進化計算による後期重爆撃期仮説の検証

• 研究課題/領域番号: 21540441
• 研究種目: 基盤研究(C)
• 配分区分: 補助金
• 応募区分: 一般
• 研究分野: 固体地球惑星物理学
• 研究機関: 国立天文台
• 研究代表者: 伊藤 孝士 国立天文台, 天文データセンター, 助教 (40280565)
• 研究分担者: 吉田 二美 国立天文台, 国際連携室, 専門研究職員 (20399306)
• 連携研究者: 武田 隆顕 国立天文台, 天文シミュレーションプロジェクト, 専門研究職員 (70413961)
• 研究期間 (年度): 2009 – 2011
• 研究課題ステータス: 完了 (2011年度)
• 配分額: 4,160千円 (直接経費: 3,200千円、間接経費: 960千円); 2011年度: 1,040千円 (直接経費: 800千円、間接経費: 240千円); 2010年度: 2,210千円 (直接経費: 1,700千円、間接経費: 510千円); 2009年度: 910千円 (直接経費: 700千円、間接経費: 210千円)
• キーワード: 固体惑星 / 衛星 / 小惑星 / クレーター / 天体力学 / オールト雲 / 衝突 / シミュレーション

研究概要

小惑星は太陽系の進化に於いて常に中心的な役割を果たして来た天体である。その中でも地球に接近して衝突の可能性すらある天体は地球接近小惑星と呼ばれ、活発なサーベイ観測の対象となっている。本研究での各種の光学観測と数値シミュレーションの結果より後期隕石重爆撃期を引き起こした衝突天体は太陽系の多様な場所から飛来した可能性があり、その起源を知るには更に詳細な観測データや探査ミッションの積み重ねが必要であることが明らかになった。

研究成果

• [雑誌論文] On the error reduction of a simple symplectic integrator (2012)
  • 著者名/発表者名: Takashi Ito and Kiyotaka Tanikawa
  • 雑誌名: Publ. Astron. Soc. Japan 巻: 64 ページ: 35-35
  • NAID: 10030747954
  • URL: http://pasj.asj.or.jp/v64/n2/640035/640035a.html
  • 査読あり
• [雑誌論文] Do meteoroids originated from near-Earth asteroid(25143) Itokawa exist? (2011)
  • 著者名/発表者名: Katsuhito Ohtsuka, Shinsuke Abe, Takashi Ito, Tomoki Nakamura, Masanao Abe, Hajime Yano, and Jun-ichi Watanabe
  • 雑誌名: Publ. Astron. Soc. Japan 巻: 63
  • NAID: 10030385127
  • URL: http://pasj.asj.or.jp/v63/n6/630604/630604a.html
  • 査読あり
• [雑誌論文] A study of asteroid pole-latitude distribution based on an extended set of shape models derived by the lightcurve inversion method (2011)
  • 著者名/発表者名: J. Hanus, J. Durech, M. Broz, B. D. Warner, F. Pilcher, R. Stephens, J. Oey, L. Bernasconi, S. Casulli, R. Behrend, D. Polishook, T. Henych, M. Lehky, F. Yoshida, and T. Ito
  • 雑誌名: Astron. Astrophys 巻: 530
  • 査読あり
• [雑誌論文] Subaru lightcurve observations of sub-km-sized main-belt asteroids (2011)
  • 著者名/発表者名: Budi Derwaman, Tsuko Nakamura Tsuko, and Fumi Yoshida
  • 雑誌名: Publ. Astron. Soc. Japan 巻: 63
  • NAID: 10029039301
  • URL: http://pasj.asj.or.jp/v63/sp2/63s218/63s218a.html
  • 査読あり
• [雑誌論文] Sphericity preference in shapes of sub-km-sized fast-rotating main-belt asteroids (2011)
  • 著者名/発表者名: Tsuko Nakamura, Budi Dermawan, and Fumi Yoshida
  • 雑誌名: Publ. Astron. Soc. Japan 巻: 63
  • NAID: 10029039346
  • URL: http://pasj.asj.or.jp/v63/sp2/63s219/63s219a.html
  • 査読あり
• [雑誌論文] Do meteoroids originated from near-Earth asteroid (25143) Itokawa exist? (2011)
  • 著者名/発表者名: Katsuhito Ohtsuka, Shinsuke Abe, Takashi Ito, Tomoki Nakamura, Masanao Abe, Hajime Yano, Jun-ichi Watanabe
  • 雑誌名: Publ.Astron.Soc.Japan 巻: 63
  • NAID: 10030385127
  • 査読あり
• [雑誌論文] Asymmetric cratering on the Moon : Case of the raw near-Earth asteroid population (2010)
  • 著者名/発表者名: Takashi Ito
  • 雑誌名: Advances in Geosciences 巻: 25 ページ: 109-119
  • URL: http://ebooks.worldscinet.com/ISBN/9789814355377/9789814355377_0008.html
  • 査読あり
• [雑誌論文] Young asteroid families and their lightcurve observation at Maidanak Observatory, Uzbekistan (2010)
  • 著者名/発表者名: Takashi Ito and Fumi Yoshida
  • 雑誌名: Advances in Geosciences 巻: 25 ページ: 161-172
  • URL: http://ebooks.worldscinet.com/ISBN/9789814355377/9789814355377_0012.html
  • 査読あり
• [雑誌論文] Asymmetric impacts of near-Earth asteroids on the Moon (2010)
  • 著者名/発表者名: Takashi Ito and Renu Malhotra
  • 雑誌名: Astronomy & Astrophysics 巻: 519
  • 査読あり
• [雑誌論文] Takashi Ito and the HSC Solar System Science Group, Solar system science with the Hyper Suprime-Cam survey (2010)
  • 著者名/発表者名: Fumi Yoshida, Tsuyoshi Terai, Seitaro Urakawa, Shinsuke Abe, Wing-Huen Ip, Shigeru Takahashi
  • 雑誌名: Advances in Geosciences 巻: 25 ページ: 1-10
  • URL: http://ebooks.worldscinet.com/ISBN/9789814355377/9789814355377_0001.html
  • 査読あり
• [雑誌論文] A Search for Water Masers in the Saturnian System (2010)
  • 著者名/発表者名: S. Takahashi, S. Deguchi, N. Kuno, T. Shimoikura, and F. Yoshida
  • 雑誌名: Publ. Astron. Soc. Japan 巻: 62
  • NAID: 10026717140
  • URL: http://pasj.asj.or.jp/v62/n4/620408/620408a.html
  • 査読あり
• [雑誌論文] Asymmetric impacts of near-Earth asteroids on the Moon (2010)
  • 著者名/発表者名: Takashi Ito, Renu Malhotra
  • 雑誌名: Astronomy & Astrophysics 巻: 519
  • 査読あり
• [雑誌論文] Solar radiation heating effects on 3200 Phaethon (2009)
  • 著者名/発表者名: Katsuhito Ohtsuka, Aiko Nakato, Tomoki Nakamura, Daisuke Kinoshita, Takashi Ito, Makoto Yoshikawa, and Sunao Hasegawa
  • 雑誌名: Publ. Astron. Soc. Japan 巻: 61 ページ: 1375-1387
  • NAID: 10026422072
  • URL: http://pasj.asj.or.jp/v61/n6/610621/610621a.html
  • 査読あり
• [雑誌論文] Photometric observations of young asteroid families at Maidanak Observatory (2009)
  • 著者名/発表者名: Fumi Yoshida, Takashi Ito, Shigeru Takahashi, Mansur A. Ibrahimov, and Anastasiya L. Marchalkina
  • 雑誌名: Advances in Geosciences 巻: 15 ページ: 119-132
  • URL: http://ebooks.worldscinet.com/ISBN/9789812836229/9789812836229_0008.html
  • 査読あり
• [雑誌論文] Spin rates of fast-rotating asteroids and fragments in impact disruption (2009)
  • 著者名/発表者名: Toshihiko Kadono, Masahiko Arakawa, Takashi Ito, and Keiji Ohtsuki
  • 雑誌名: Icarus 巻: 200 ページ: 694-697
  • URL: http://www.sciencedirect.com/science/article/pii/S0019103508004223
  • 査読あり
• [雑誌論文] Simultaneous photometric and polarimetric of asteroid 3 Juno (2009)
  • 著者名/発表者名: S. Takahashi, F. Yoshida, K. Shinokawa, T. Mukai, and K. Kawabata
  • 雑誌名: Astron. J. 巻: 138 ページ: 951-955
  • URL: http://iopscience.iop.org/1538-3881/138/3/951/
  • 査読あり
• [雑誌論文] Mass dispersal and angular momentum transfer during collisions between rubble-pile asteroids. II. Effects of Initial Rotation and Spin-Down through Disruptive Collisions (2009)
  • 著者名/発表者名: Takaaki Takeda, Keiji Ohtsuki
  • 雑誌名: Icarus 巻: 202 ページ: 514-524
  • URL: http://www.sciencedirect.com/science/article/pii/S0019103509000943
  • 査読あり
• [雑誌論文] Solar radiation heating effects on 3200 Phaethon (2009)
  • 著者名/発表者名: Katsuhito Ohtsuka, Aiko Nakato, Tomoki Nakamura, Daisuke Kinoshita, Takashi Ito, Makoto Yoshikawa, Sunao Hasegawa
  • 雑誌名: Publ.Astron.Soc.Japan 61 ページ: 1375-1387
  • NAID: 10026422072
  • 査読あり
• [雑誌論文] Asymmetric impacts of near-Earth asteroids on the Moon (2009)
  • 著者名/発表者名: Takashi Ito
  • 雑誌名: Advances in Geosciences 15 ページ: 107-118
  • 査読あり
• [雑誌論文] Photometric observations of young asteroid families at Maidanak observatory (2009)
  • 著者名/発表者名: Fumi Yoshida, Takashi Ito, Shigeru Takahashi, Mansur A.Ibrahimov, Anastasiya L.Marcha Ikina
  • 雑誌名: Advances in Geosciences 15 ページ: 119-132
  • 査読あり
• [学会発表] Asymmetric cratering on the Moon from the revised NEA model and its implication (2012)
  • 著者名/発表者名: Ito, T.
  • 学会等名: Subaru Users Meeting
  • 発表場所: Mitaka, Tokyo, Japan
• [学会発表] Radial transport of small solar system bodies-from 10^0AU to 10^5AU- (2012)
  • 著者名/発表者名: Higuchi, A., Kokubo, E., and Ito, T.
  • 学会等名: Solar System Exploration and New Geosciences-Perspective for the Next Decade(MISASA IV), Institute for Study of the Earth's Interior
  • 発表場所: Okayama University, Misasa, Tottori, Japan
• [学会発表] Asymmetric cratering on the Moon and its implication to a hidden NEA population (2012)
  • 著者名/発表者名: Ito, T.
  • 学会等名: Maidanak Observatory Users Meeting
  • 発表場所: Mitaka, Tokyo, Japan
• [学会発表] Japanese activities on Maidanak Observatory,"Maidanak Observatory Users Meeting 2012" (2012)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: National Astronomical Observatory of Japan
  • 発表場所: Mitaka, Tokyo, Japan
• [学会発表] Slitless Spectroscopy of Small Solar System Bodies on a Dark Cloud Curtain (2012)
  • 著者名/発表者名: F. Yoshida, M. Yagi, Y. Komiyama, F. Nakata, H. Furusawa, T. Ohno, S. Okamura and T. Nakamura
  • 学会等名: Subaru Users Meeting 2011, National Astronomical Observatory of Japan
  • 発表場所: Mitaka, Tokyo, Japan
• [学会発表] Dynamical evolution of the Oort cloud new comets (2011)
  • 著者名/発表者名: Takashi Ito, Arika Higuchi
  • 学会等名: Asia-Oceania Geoscience Society 8th Annual Meeting
  • 発表場所: Taipei International Convention Center, Taiwan
  • 年月日: 2011-08-10
• [学会発表] History of the solar system derived from the record on the Moon surface-What happened on the Moon 3.8 billion years ago? (2011)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: You are Galileo! Workshop in Indonesia
  • 発表場所: Universitas Negeri Yogyakarta, Yogyakarta, Indonesia
  • 年月日: 2011-02-24
• [学会発表] History of the solar system derived from the record on the Moon surface-What happened on the Moon 3.8 billion years ago? (2011)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: You are Galileo! Workshop in Indonesia, SMAN 38-FOSCA
  • 発表場所: Jakarta, Indonesia
  • 年月日: 2011-02-22
• [学会発表] Dynamical evolution of the Oort cloud new comets (2011)
  • 著者名/発表者名: Ito, T. and Higuchi, A.
  • 学会等名: Asia-Oceania Geoscience Society 8th Annual Meeting
  • 発表場所: Taipei International Convention Center, Taipei, Taiwan
• [学会発表] Slitless Spectroscopy of Small Solar System Bodies on a Dark Cloud Curtain (2011)
  • 著者名/発表者名: Fumi Yoshida, Masafumi Yagi, Yutaka Komiyama, Fumiaki Nakata, Hisanori Furusawa, Tomohiro Ohno, Sadanori Okamura, Tsuko Nakamura
  • 学会等名: The 11th Asian-Pacific Regional IAU Meeting
  • 発表場所: Chiang Mai, Thailand
• [学会発表] Photometric Observation of Young Asteroid Families at Maidanak Observatory in 2006-2010 (2011)
  • 著者名/発表者名: Fumi Yoshida,Yui Nozawa, Takashi Ito, Shigeru Takahashi, Kiichi Okita, Mansure Ibrahimov, Shuhrat Ehgamberdiev, Anastasiya Marshalkina, Rivkat Karimov, Otabek Bbrhonov, Yusufjon Tillayev, Bahadir Hafizov, Toshifumi Yanagisawa, Hirohisa Kurosaki, Makoto Yo
  • 学会等名: Asia-Oceania Geoscience Society 8th Annual Meeting
  • 発表場所: Taipei International Convention Center, Taipei, Taiwan
• [学会発表] Slitless Spectroscopy of Small Solar System Bodies on a Dark Cloud Curtain (2011)
  • 著者名/発表者名: F. Yoshida, M. Yagi, Y. Komiyama, F. Nakata, H. Furusawa, T. Ohno, S. Okamura and T. Nakamura
  • 学会等名: Subaru Users Meeting 2010, National Astronomical Observatory of Japan
  • 発表場所: Mitaka, Tokyo, Japan
• [学会発表] Asymmetric cratering due to a steady-state NEA flux on the Moon (2010)
  • 著者名/発表者名: Takashi Ito
  • 学会等名: Asia-Oceania Geoscience Society 7th Annual Meeting
  • 発表場所: Hyderabad International Convention Centre Hyderabad, India
  • 年月日: 2010-07-05
• [学会発表] Asteroids in the solar system Public lecture (2010)
  • 著者名/発表者名: Ito, T.
  • 学会等名: Ulugh Beg Astronomical Institute
  • 発表場所: Tashkent, Uzbekistan
  • 年月日: 2010-06-22
• [学会発表] Comparison of seeing between Maidanak and Nyukasa (2010)
  • 著者名/発表者名: Ito, T.
  • 学会等名: Maidanak Observatory Users Meeting
  • 発表場所: Tashkent, Uzbekistan
  • 年月日: 2010-06-21
• [学会発表] Japanese activities concerning Maidanak (2010)
  • 著者名/発表者名: Fumi Yoshida, Takashi Ito, Shigeru Takahashi, Kiichi Okita, Hiroshi Karoji, Shinobu Ozaki, Toshifumi Yanagisawa, Hirohisa Kurosaki, Makoto Yoshikawa, Tomohiro Yamaguchi, Noritsugu Takahashi, Seitaro Urakawa, Hiroshi Ohtani, and Yui Nozawa
  • 学会等名: Maidanak Observatory Users Meeting
  • 発表場所: Tashkent, Uzbekistan
  • 年月日: 2010-06-21
• [学会発表] Asteroids in the solar system Public lecture (2010)
  • 著者名/発表者名: Ito, T.
  • 発表場所: National Central University, Zhongli, Taiwan
  • 年月日: 2010-04-29
• [学会発表] Asteroids in the solar system Public lecture (2010)
  • 著者名/発表者名: Ito, T.
  • 発表場所: Taipei Astronomical Museum, Taipei, Taiwan
  • 年月日: 2010-04-28
• [学会発表] Asteroids in the solar system Public lecture (2010)
  • 著者名/発表者名: Ito, T.
  • 発表場所: National Museum for Natural Science, Taichung, Taiwan
  • 年月日: 2010-04-25
• [学会発表] Asymmetric impact cratering on the Moon and its dependence on debiased NEA models (2010)
  • 著者名/発表者名: Ito, T. and Malhotra, R.
  • 学会等名: AGU Fall Meeting 2010
  • 発表場所: Moscone Convention Center, San Francisco California, USA
• [学会発表] Asymmetric cratering due to a steady-state NEA flux on the Moon (2010)
  • 著者名/発表者名: Ito, T. and Malhotra, R.
  • 学会等名: Asia-Oceania Geoscience Society 7th Annual Meeting
  • 発表場所: Hyderabad International Convention Centre, Hyderabad, India
• [学会発表] Impact probability of the Oort cloud comets on planets (2010)
  • 著者名/発表者名: Ito, T. and Higuchi, A.
  • 学会等名: Asia-Oceania Geoscience Society 7th Annual Meeting
  • 発表場所: Hyderabad International Convention Centre, Hyderabad, India
• [学会発表] JSPS Asia-Africa Platform Program : Outline and objectives (2010)
  • 著者名/発表者名: Ito, T.
  • 学会等名: Asia Asteroid Workshop
  • 発表場所: Lijiang, Yunnan, China
• [学会発表] Stars of Asia (2010)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: 11th PCST
  • 発表場所: New Delhi, India
• [学会発表] Stars of Asia (2010)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: EAMA8
  • 発表場所: Shanghai, China
• [学会発表] Slitless Spectroscopy of Small Solar System Bodies on a Dark Cloud Curtain (2010)
  • 著者名/発表者名: F. Yoshida, M. Yagi, Y. Komiyama, F. Nakata, H. Furusawa, T. Ohno, S. Okamura and T. Nakamura
  • 学会等名: Asia-Oceania Geoscience Society 7th Annual Meeting
  • 発表場所: Hyderabad International Convention Centre, Hyderabad, India
• [学会発表] A possible collaboration with the Slitless Spectroscopic survey of Small Solar System Bodies by Subaru Telescope (2010)
  • 著者名/発表者名: F. Yoshida, M. Yagi, Y. Komiyama, F. Nakata, H. Furusawa, T. Ohno, S. Okamura and T. Nakamura
  • 学会等名: Asia Asteroid Workshop
  • 発表場所: Lijiang, Yunnan, China
• [学会発表] Slitless Spectroscopy of Small Solar System Bodies on a Dark Cloud Curtain (2010)
  • 著者名/発表者名: F. Yoshida, M. Yagi, Y. Komiyama, F. Nakata, H. Furusawa, T. Ohno, S. Okamura and T. Nakamura
  • 学会等名: 41st Lunar and Planetary Science Conference
  • 発表場所: The Wooflands, Texas, USA
• [学会発表] Asia-wide network of near-Earth asteroid observation (2009)
  • 著者名/発表者名: Ito, T.
  • 学会等名: Maidanak Observatory Users Meeting
  • 発表場所: Seoul National University, Seoul, Korea
  • 年月日: 2009-06-30
• [学会発表] Asia-wide observational network for NEO observation (2009)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: Maidanak Observatory Users Meeting
  • 発表場所: Seoul National University, Seoul, Korea
  • 年月日: 2009-06-30
• [学会発表] Photometric observations of young asteroids families at Maidanak Observatory (2009)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: Maidanak Observatory Users Meeting
  • 発表場所: Seoul National University, Seoul, Korea
  • 年月日: 2009-06-30
• [学会発表] Photometric observations of young asteroid family at Maidanak Observatory (2009)
  • 著者名/発表者名: Ito, T., Yoshida, F. and Ibrahimov, M.
  • 学会等名: Asia-Oceania Geoscience Society 6th Annual Meeting
  • 発表場所: Suntech, Singapore
• [学会発表] Impact probability of the Oort cloud comets on planets (2009)
  • 著者名/発表者名: Ito, T. and Higuchi, A.
  • 学会等名: Asia-Oceania Geoscience Society 6th Annual Meeting
  • 発表場所: Suntech, Singapore
• [学会発表] Asymmetric distribution of cratering impacts on the Moon (2009)
  • 著者名/発表者名: Ito, T. and Malhotra, R.
  • 学会等名: Asian Asteroid Observation Network Workshop, Purple Mountain Observatory
  • 発表場所: Nanjing, China
• [学会発表] Asymmetric impacts of NEOs on the Moon (2009)
  • 著者名/発表者名: Ito, T. and Malhotra, R.
  • 学会等名: 12th Lunar & Planetary Laboratory Conference
  • 発表場所: Tucson, AZ, USA
• [学会発表] Collaborations between NCU and NAOJ :(1) Improvements of the Maidanak observatory,(2) The HSC survey for small solar system bodies (2009)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: NCU-CPS Japan-Taiwan Planetary Science Workshop, National Central University
  • 発表場所: Zhongli, Taiwan
• [学会発表] An Insight into the Solar System History through the Size Distribution of Jupiter Trojans (2009)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: CPS Workshop on Icy Moons and Origin of Jupiter and other Giant Planets
  • 発表場所: Hokkaido University, Sapporo, Japan
• [学会発表] Survey Design for the Small Solar System Objects with the Hyper Suprime-Cam(HSC) (2009)
  • 著者名/発表者名: Fumi Yoshida and the HSC Solar System Science Group
  • 学会等名: Asia-Oceania Geoscience Society 6th Annual Meeting
  • 発表場所: Suntech, Singapore
• [学会発表] Asia-wide observational network for NEO observation (2009)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: Asian Asteroid Observation Network Workshop, Purple Mountain Observatory
  • 発表場所: Nanjing, China
• [学会発表] Photometric observations of young asteroids families at Maidanak Observatory (2009)
  • 著者名/発表者名: Fumi Yoshida
  • 学会等名: Asian Asteroid Observation Network Workshop, Purple Mountain Observatory
  • 発表場所: Nanjing, China