Investigation of the Solar System Evolution based on Trans-Neptunina Objects

• Project/Area Number: 18K13607
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 17010:Space and planetary sciences-related
• Research Institution: National Astronomical Observatory of Japan
• Principal Investigator: Terai Tsuyoshi 国立天文台, ハワイ観測所, RCUH職員 (20624018)
• Project Period (FY): 2018-04-01 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 太陽系小天体 / 太陽系外縁天体 / サイズ頻度分布 / すばる望遠鏡 / サーベイ観測 / 木星トロヤ群 / ヒルダ群小惑星 / サイズ分布 / Hyper Suprime-Cam / トロヤ群 / ヒルダ群 / ケンタウルス族

Outline of Final Research Achievements

We established a method for accurately measuring the size frequency distribution of small-body population in our solar system based on wide survey data obtained by using the Hyper Suprime-Cam, a wide-field imaging instrument mounted on the Subaru Telescope. Using this technique, we successfully determined the size frequency distribution of the primordial population of trans-Neptunian objects (TNOs) in the size range around 100 km in diameter. We also measured the size frequency distributions of Jupiter Trojan and Hilda asteroids, and found that they have the common shape of size distributions but it is distinct from that of main-belt asteroids. These results indicate that Jupiter Trojan and Hilda asteroids have similar origins to that of the dynamically-hot population of TNOs that are considered to have formed in the giant planet regions rather than that of main-belt asteroids.

Academic Significance and Societal Importance of the Research Achievements

本結果は、太陽系初期における微惑星形成、惑星成長、およびその後に起こったと考えられている惑星大移動とそれに伴う小天体の大規模力学進化を理解するうえで重要な手掛かりを与え得る。本研究課題を発展させる必要性があることは明白で、今度さらなる観測研究を推し進めることが求められる。また、将来の大型地上望遠鏡や宇宙望遠鏡、宇宙探査機による観測・探査方針の策定などへの貢献も期待される。

Research Products

• [Journal Article] Size Distribution of Small Jupiter Trojans in the L5 Swarm (2022)
  • Author(s): Uehata Kotomi、Terai Tsuyoshi、Ohtsuki Keiji、Yoshida Fumi
  • Journal Title: The Astronomical Journal Volume: 163 Issue: 5 Pages: 213-213
  • DOI: 10.3847/1538-3881/ac5b6d
  • Peer Reviewed / Open Access
• [Journal Article] FOSSIL. II. The Rotation Periods of Small-sized Hilda Asteroids (2022)
  • Author(s): Chang Chan-Kao、Chen Ying-Tung、Fraser Wesley C.、Lehner Matthew J.、Wang Shiang-Yu、Alexandersen Mike、Choi Young-Jun、Granados Contreras A. Paula、Ito Takashi、(この間に16名)、Yoshida Fumi、他2名
  • Journal Title: The Astrophysical Journal Supplement Series Volume: 259 Issue: 1 Pages: 7-7
  • DOI: 10.3847/1538-4365/ac50ac
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] FOSSIL. I. The Spin Rate Limit of Jupiter Trojans (2021)
  • Author(s): Chang Chan-Kao、Chen Ying-Tung、Fraser Wesley C.、Yoshida Fumi、Lehner Matthew J.、Wang Shiang-Yu、Kavelaars JJ、Pike Rosemary E.、Alexandersen Mike、Ito Takashi、他18名
  • Journal Title: The Planetary Science Journal Volume: 2 Issue: 5 Pages: 191-191
  • DOI: 10.3847/psj/ac13a4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Size Distributions of Bluish and Reddish Small Main-belt Asteroids Obtained by Subaru/Hyper Suprime-Cam* (2021)
  • Author(s): Maeda Natsuho、Terai Tsuyoshi、Ohtsuki Keiji、Yoshida Fumi、Ishihara Kosuke、Deyama Takuto
  • Journal Title: The Astronomical Journal Volume: 162 Issue: 6 Pages: 280-280
  • DOI: 10.3847/1538-3881/ac2c6e
  • Peer Reviewed / Open Access
• [Journal Article] A comparative study of size frequency distributions of Jupiter Trojans, Hildas and main belt asteroids: A clue to planet migration history (2019)
  • Author(s): Fumi Yoshida, Tsuyoshi Terai, Takashi Ito, Keiji Ohtsuki, Patryk Sofia Lykawka, Takahiro Hiroi, Naruhisa Takato
  • Journal Title: Planetary and Space Science Volume: 169 Pages: 78-85
  • DOI: 10.1016/j.pss.2019.02.003
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Subaru and WFIRST: A Partnership for the 2020s (2019)
  • Author(s): Jason Rhodes, Takahiro Sumi, David Bennett,..., Tsuyoshi Terai, et al.
  • Journal Title: Bulletin of the American Astronomical Society Volume: 51
  • Open Access / Int'l Joint Research
• [Journal Article] Second Data Release of the Hyper Suprime-Cam Subaru Strategic Program (2019)
  • Author(s): Aihara et al. (including C. Hikage)
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 71 Issue: 6 Pages: 114-114
  • DOI: 10.1093/pasj/psz103
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Size Distribution of Small Hilda Asteroids (2018)
  • Author(s): Terai Tsuyoshi、Yoshida Fumi
  • Journal Title: The Astronomical Journal Volume: 156 Issue: 1 Pages: 30-30
  • DOI: 10.3847/1538-3881/aac81b
  • Peer Reviewed
• [Journal Article] Colors of Centaurs observed by the Subaru/Hyper Suprime-Cam and implications for their origin (2018)
  • Author(s): Sakugawa Haruka、Terai Tsuyoshi、Ohtsuki Keiji、Yoshida Fumi、Takato Naruhisa、Lykawka Patryk Sofia、Wang Shiang-Yu
  • Journal Title: Publications of the Astronomical Society of Japan Volume: 70 Issue: 6 Pages: 116-116
  • DOI: 10.1093/pasj/psy127
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Inversion Angle of Phase-polarization Curve of Near-Earth Asteroid (3200) Phaethon (2018)
  • Author(s): Shinnaka Yoshiharu、Kasuga Toshihiro、Furusho Reiko、Boice Daniel C.、Terai Tsuyoshi、Noda Hirotomo、Namiki Noriyuki、Watanabe Jun-ichi
  • Journal Title: The Astrophysical Journal Volume: 864 Issue: 2 Pages: L33-L33
  • DOI: 10.3847/2041-8213/aadb3d
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] すばるHSC-SSP Public Data Release 2 既知太陽系小天体カタログ (2023)
  • Author(s): 大坪貴文、高田唯史、古澤久徳、古澤順子、寺居剛、吉田二美、浦川聖太郎、HSC 超高速DB グループ
  • Organizer: 日本天文学会2023年春季年会
• [Presentation] Searching for New Horizons Targets in the Distant Kuiper Belt (2022)
  • Author(s): Anne Verbiscer, Simon Porter, Wesley C. Fraser, J. J. Kavelaars, Susan Benecchi, David Gerdes, Hsing-Wen Lin, Marc W. Buie, Fumi Yoshida, Takashi Ito, John R. Spencer, Alan S. Stern, Kevin Napier, Lowell Peltier, Tsuyoshi Terai
  • Organizer: American Geophysical Union Fall Meeting 2022
  • Int'l Joint Research
• [Presentation] Extraction and identification system for small solar system bodies in the Hyper Suprime-Cam Subaru Strategic Program data (2022)
  • Author(s): Takafumi Ootsubo, Tadafumi Takata, Junko Furusawa, Hisanori Furusawa, Tsuyoshi Terai, Seitaro Urakawa, Fumi Yoshida
  • Organizer: Astronomical Data Analysis Software and Systems conference 2022
  • Int'l Joint Research
• [Presentation] Size distributions of small main belt asteroids obtained by the Subaru/Hyper Suprime-Cam (2022)
  • Author(s): Natsuho Maeda, Tsuyoshi Terai, Keiji Ohtsuki, Fumi Yoshida, Kosuke Ishihara, Takuto Deyama
  • Organizer: Japan Geoscience Union Meeting 2022
  • Int'l Joint Research
• [Presentation] 次世代赤外線天文衛星GREX-PLUSが切り拓く太陽系小天体サイエンス (2022)
  • Author(s): 寺居剛、大坪貴文
  • Organizer: 日本惑星科学会秋季講演会
• [Presentation] 木星トロヤ群L4・L5間のサイズ分布比較 (2022)
  • Author(s): 寺居剛、上畑琴美、大槻圭史、吉田二美
  • Organizer: 日本惑星科学会秋季講演会
• [Presentation] すばるHSC-SSP PDR2データ中の移動天体探査と既知太陽系小天体カタログ作成 (2022)
  • Author(s): 大坪貴文、高田唯史、古澤久徳、古澤順子、寺居剛、吉田二美、浦川聖太郎、HSC 超高速DB グループ
  • Organizer: 日本天文学会2022年秋季年会
• [Presentation] Water ice abundance on small trans Neptunian objects (2022)
  • Author(s): 寺居剛
  • Organizer: GREX PLUS サイエンス検討会 FY2021
• [Presentation] Color and size distributions of main belt asteroids obtained by the Subaru/Hyper Suprime-Cam (2021)
  • Author(s): 前田夏穂、寺居剛、大槻圭史、吉田二美、石原昂将、出山拓門
  • Organizer: Japan Geoscience Union Meeting 2021
  • Int'l Joint Research
• [Presentation] Solar System Sciences (2021)
  • Author(s): Tsuyoshi Terai, Bryan Holler, Fumi Yoshida, Stefanie Milam
  • Organizer: Subaru Roman Synergistic Observations Workshop IV
  • Int'l Joint Research
• [Presentation] すばる望遠鏡HSCの観測画像・カタログデータベースを活用した既知太陽系小天体探査 (2021)
  • Author(s): 大坪貴文，高田唯史，古澤久徳，古澤順子，寺居剛，吉田二美，浦川聖太郎
  • Organizer: 日本天文学会2021年秋季年会
• [Presentation] すばる望遠鏡Hyper Suprime-Cam で得た表面カラーの異なるメインベルト小惑星のサイズ分布比較 (2021)
  • Author(s): 前田夏穂、寺居剛、大槻圭史、吉田二美、石原昂将、出山拓門
  • Organizer: 太陽系天体若手研究会
• [Presentation] すばる望遠鏡HSC データを用いた既知太陽系小天体探査 (2021)
  • Author(s): 大坪貴文、高田唯史、古澤久徳、古澤順子、寺居剛、吉田二美、浦川聖太郎
  • Organizer: 日本天文学会2021年春季年会
• [Presentation] Size Distributions of Bluish and Reddish Small Main Belt Asteroids (2021)
  • Author(s): Natsuho Maeda, Tsuyoshi Terai, Keiji Ohtsuki, Fumi Yoshida, Takuto Deyama
  • Organizer: 52nd Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Measurement of Size Distribution of Cold Classical Trans-Neptunian Objects (2020)
  • Author(s): 寺居剛、吉田二美、大槻圭史
  • Organizer: Japan Geoscience Union Meeting 2020
  • Int'l Joint Research
• [Presentation] Size distribution of Jupiter's Trojan asteroids in the L5 swarm obtained by the Subaru/Hyper Suprime-Cam (2020)
  • Author(s): 上畑琴美、寺居剛、大槻圭史、吉田二美
  • Organizer: Japan Geoscience Union Meeting 2020
  • Int'l Joint Research
• [Presentation] Phase curves of >20,000 small solar system bodies obtained by the Tomo-e Gozen transient survey (2020)
  • Author(s): 吉田二美、伊藤孝士、浦川聖太郎、寺居剛、冨永望、諸隈智貴、酒向重行、大澤亮、田中雅臣、濵﨑凌
  • Organizer: Japan Geoscience Union Meeting 2020
  • Int'l Joint Research
• [Presentation] Phase curves of >40,000 small solar system bodies obtained by the Tomo-e Gozen transient survey (2020)
  • Author(s): Fumi Yoshida, Takashi Ito, Seitaro Urakawa, Tsuyoshi Terai, Nozomu Tominaga, Tomoki Morokuma, Shigeyuki Sako, Ryou Ohsawa, Masaomi Tanaka, Ryo Hamasaki
  • Organizer: 14th Europlanet Science Congress 2020
  • Int'l Joint Research
• [Presentation] すばる望遠鏡Hyper Suprime-Cam で検出された微小メインベルト小惑星のサイズ分布測定 (2020)
  • Author(s): 前田夏穂、寺居剛、大槻圭史、吉田二美、石原昂将、出山拓門
  • Organizer: 日本惑星科学会2020年秋季講演会
• [Presentation] Phase curves of >40,000 small solar system bodies obtained by the Tomo-e Gozen transient survey (2020)
  • Author(s): Fumi Yoshida, Takashi Ito, Seitaro Urakawa, Tsuyoshi Terai, Nozomu Tominaga, Tomoki Morokuma, Shigeyuki Sako, Ryou Ohsawa, Masaomi Tanaka, Ryo Hamasaki
  • Organizer: AAS Division of Planetary Science meeting #52
  • Int'l Joint Research
• [Presentation] SPICA の中間赤外線分光観測で探る木星トロヤ群小惑星の科学 (2020)
  • Author(s): 癸生川 陽子, 小林 仁美, 高橋 葵, 大坪 貴文, 寺居 剛, 吉田 二美, 長谷川 直, 臼井 文彦, SPICA太陽系・系外惑星サイエンス検討班
  • Organizer: 日本天文学会春季年会
• [Presentation] A comparative study of size frequency distributions of Jupiter Trojans, Hildas and main belt asteroids: A clue to planet migration history (2019)
  • Author(s): Fumi Yoshida, Tsuyoshi Terai, Takashi Ito, Keiji Ohtsuki, Patryk Sofia Lykawka, Takahiro Hiroi, Naruhisa Takato, Takuto Deyama
  • Organizer: The Main Belt: A Gateway to the Formation and Early Evolution of the Solar System
  • Int'l Joint Research
• [Presentation] TMT/IRIS による太陽系外縁天体の近赤外線分光観測 (2019)
  • Author(s): 寺居 剛, 吉田 二美, 関口 朋彦, 阿部 新助, 石黒 正晃, 臼井 文彦, 大坪 貴文, 河北 秀世, 新中 善晴, 高遠 徳尚, 長谷川 直, 渡部 潤一
  • Organizer: 日本天文学会秋季年会
• [Presentation] 木星トロヤ群、ヒルダ群、およびメインベルト小惑星のサイズ頻度分布の比較研究：太陽系初期の惑星移動への手がかり (2019)
  • Author(s): 吉田 二美, 寺居 剛, 伊藤 孝士, 大槻 圭史, Lykawka Sofia Patryk, 廣井 隆弘, 高遠 徳尚
  • Organizer: 日本惑星科学会秋季講演会
• [Presentation] Size and Color Distributions of Small Main-Belt Asteroids Observed by the Subaru/Hyper Suprime-Cam (2019)
  • Author(s): Deyama Takuto、Terai Tsuyoshi、Ohtsuki Keiji、Yoshida Fumi
  • Organizer: 50th Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Comparison of the Size Distributions among Jupiter Trojan, Hilda, and Main-Belt Asteroids (2018)
  • Author(s): Terai Tsuyoshi、Yoshida Fumi
  • Organizer: Japan Geoscience Union Meeting 2018
  • Int'l Joint Research
• [Presentation] Multi-band Photometry of Trans-Neptunian Objects in the Subaru Hyper Suprime-Cam Survey (2018)
  • Author(s): Terai Tsuyoshi、Yoshida Fumi、Ohtsuki Keiji、Lykawka Patryk Sofia、Takato Naruhisa、Higuchi Arika、Ito Takashi
  • Organizer: Japan Geoscience Union Meeting 2018
  • Int'l Joint Research
• [Presentation] Colors of Centaurs observed by the Subaru/Hyper Suprime-Cam (2018)
  • Author(s): Sakugawa Haruka、Terai Tsuyoshi、Ohtsuki Keiji、Yoshida Fumi
  • Organizer: Japan Geoscience Union Meeting 2018
  • Int'l Joint Research
• [Presentation] Polarimetry of Near-Earth Asteroid (3200) Phaethon on 2017 December (2018)
  • Author(s): Shinnaka Yoshiharu、Kasuga Toshihiro、Furusho Reiko、Namiki Noriyuki、Noda Hirotomo、Terai Tsuyoshi、Watanabe Jun-ichi
  • Organizer: Japan Geoscience Union Meeting 2018
  • Int'l Joint Research
• [Presentation] Planet Nine サーベイの進行状況とデータ解析 (2018)
  • Author(s): 寺居 剛、吉田二美、P9/RRLサーベイプロジェクト
  • Organizer: 日本天文学会秋季年会
• [Presentation] Wide phase-polarization curve of asteroid (3200) Phaethon during December 2017 (2018)
  • Author(s): Shinnaka Yoshiharu、Kasuga Toshihiro、Boice Daniel、Terai Tsuyoshi、Furusho Reiko、Noda Hirotomo、Namiki Noriyuki、Watanabe Jun-ichi
  • Organizer: American Astronomical Society, DPS meeting #50
  • Int'l Joint Research