Modeling the Planetesimal formation Process and Its Comparison to Observations of Vega-like stars

2011 Fiscal Year Final Research Report

• Project/Area Number: 20540232
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Tokyo Institute of Technology (2010-2011); Hokkaido University (2008-2009)
• Principal Investigator: TAKEUCHI Taku 東京工業大学, 大学院・理工学研究科, 科学研究費研究員 (40372651)
• Co-Investigator(Kenkyū-buntansha): NAKAGAWA Yoshitsugu 神戸大学, 大学院・理学研究科, 教授 (30172282) ; AIKAWA Yuri 神戸大学, 大学院・理学研究科, 准教授 (40324909) ; TANAKA Hidekazu 北海道大学, 低温科学研究所, 准教授 (00282814)
• Project Period (FY): 2008 – 2011
• Keywords: 理論天文学 / 惑星形成 / 原始惑星系円盤 / ベガ型星 / 太陽系外惑星系

Research Abstract

We study planetesimal formation processes. The following effects are studied : turbulence induced by the dust layer formed at the midplane of the gas disks, self-gravity of the dust layer, grain charges, and collisional fragmentation. We derived properties of the gas disks required for planetesimal formation. In order to compare the planetesimal formation theory to the observations of Vega-like stars, we study dust disk structure affected by the stellar radiation and the disk gas. We have also performed experimental studies of high velocity collisions of dust particles and derived the size distribution of collisional fragments. Finally, we derived the gas disk properties from the observation of the transitional disk, which is considered to be a former stage of Vega-like disks.

Research Products

• [Journal Article] Minimum Dust Abundances for Planetesimal Formation via Secular Gravitational Instabilities (2012)
  • Author(s): Takeuchi, T., and Ida, S.
  • Journal Title: The Astrophysical Journal Volume: 749 Pages: 89(8pp)
  • Peer Reviewed
• [Journal Article] Discovery of Small-Scale Spiral Structures in the Disk of SAO 206462(HD 135344B): Implications for the Physical States of the Disk from Spiral Density Wave Theory (2012)
  • Author(s): Muto, T., Grady, C. A., Hashimoto, J., et al
  • Journal Title: The Astrophysical Journal Letters Volume: 748 Pages: L22(7pp)
  • Peer Reviewed
• [Journal Article] Induced Turbulence and the Density Structure of the Dust Layer in a Protoplanetary Disk (2012)
  • Author(s): Takeuchi, T., Muto, T., Okuzumi S., Ishitsu, N., and Ida, S.
  • Journal Title: The Astrophysical Journal Volume: 744 Pages: 101(16pp)
  • Peer Reviewed
• [Journal Article] On the Interaction between a Protoplanetary Diskand a Planet in an Eccentric Orbit : Application of Dynamical Friction (2011)
  • Author(s): Muto, T., Takeuchi, T., & Ida, S
  • Journal Title: The Astrophysical Journal Volume: 737 Pages: 101(16pp)
  • Peer Reviewed
• [Journal Article] Silicate Dust Size Distribution from Hypervelocity Collisions : Implications for Dust Production in Debris Disks (2011)
  • Author(s): Takasawa, S., Nakamura, A. M., Kadono, T., Arakawa, M., Dohi, K., Ohno, S., Seto, Y., Maeda, M., Shigemori, K., Hironaka, Y., Sakaiya, T., Fujioka, S., Sano, T., Otani, K., Watari, T., Sangen, K., Setoh, M., Machii, N., Takeuchi, T.
  • Journal Title: The Astrophysical Journal Letters Volume: 733 Pages: L39(4pp)
  • Peer Reviewed
• [Journal Article] Electrostatic Barrier Against Dust Growth in Protoplanetary Disks. I. Classifying the Evolution of Size Distribution (2011)
  • Author(s): Okuzumi, S., Tanaka, H., Takeuchi, T., & Sakagami, M-a.
  • Journal Title: The Astrophysical Journal Volume: 731 Pages: 95(20pp)
  • Peer Reviewed
• [Journal Article] Electrostatic Barrier Against Dust Growth in Protoplanetary Disks. II. Measuring the Size of the "Frozen" Zone (2011)
  • Author(s): Okuzumi, S., Tanaka, H., Takeuchi, T., & Sakagami, M-a.
  • Journal Title: The Astrophysical Journal Volume: 731 Pages: 96(14pp)
  • Peer Reviewed
• [Journal Article] Growth of Settling Dust Particles in Turbulent Disks, Exoplanets and Disks (2009)
  • Author(s): T. Takeuchi T. Usuda, M. Ishii, and M. Tamura
  • Journal Title: Their Formation and Diversity Volume: 1158 Pages: 163-164
• [Journal Article] Photophoretic Structuring of Circumstellar Dust Disks (2008)
  • Author(s): Takeuchi, T., & Krauss, O.
  • Journal Title: The Astrophysical Journal Volume: 677 Pages: 1309-1323
  • Peer Reviewed
• [Presentation] 磁気乱流不活性領域を考慮した原始惑星系円盤の面密度分布 (2012)
  • Author(s): 竹内拓
  • Organizer: 日本天文学会2012年春季年会
  • Place of Presentation: 龍谷大学、京都
  • Year and Date: 2012-03-22
• [Presentation] 円盤ダスト層で励起される乱流についてのエネルギー的議論 (2011)
  • Author(s): 竹内拓
  • Organizer: 惑星系の起源と進化に関する研究会
  • Place of Presentation: 長浜市,招待講演
  • Year and Date: 2011-11-12
• [Presentation] Disk-Planet Interaction and Planetesimal formation、Ishigaki International Workshop(FSP2011) (2011)
  • Author(s): Takeuchi, T.
  • Organizer: Formation of Stars & Planets 2011
  • Place of Presentation: Ishigaki, Okinawa, JAPAN
  • Year and Date: 2011-10-03
• [Presentation] ダスト層起源の乱流とダスト衝突破壊 (2011)
  • Author(s): 竹内拓
  • Organizer: 日本天文学会2011年春季年会
  • Place of Presentation: 筑波大学
  • Year and Date: 2011-03-08
• [Presentation] Dust Particle Growth and Sedimentation under the Effect of Fragmentation (2010)
  • Author(s): Takeuchi, T.
  • Organizer: Ishigaki International Conference on Evolving Theory for Planet Formation
  • Place of Presentation: Ishigaki Island, Japan
  • Year and Date: 20100620-26
• [Presentation] Growth of Settling Dust Particles in Turbulent Disks (2010)
  • Author(s): Takeuchi, T.
  • Organizer: Exoplanets and Disks : Their Formation and Diversity"
  • Place of Presentation: Hakone, Japan
  • Year and Date: 20100529-30
• [Presentation] ダストの沈殿、衝突合体、破壊によるダスト層の構造について (2010)
  • Author(s): 竹内拓
  • Organizer: 日本天文学会2010年秋季年会
  • Place of Presentation: 金沢大学
  • Year and Date: 2010-09-24
• [Presentation] 原始惑星系円盤でのダストの沈殿と成長 (2010)
  • Author(s): 竹内拓
  • Organizer: 第28回Grain Formation Workshop,平成22年度銀河のダスト研究会
  • Place of Presentation: 神戸大学,招待講演
  • Year and Date: 2010-09-03
• [Presentation] Dust in Protoplanetary Disks : Dust Growth and Planetesimal Formation (2009)
  • Author(s): T. Takeuchi
  • Organizer: NCU-CPS Japan-Taiwan Planetary Science Workshop 2009
  • Place of Presentation: National Central University(台湾中れき市)
  • Year and Date: 20091208-09
• [Presentation] Growth of Settling Dust Particles in Turbulent Di (2009)
  • Author(s): Takeuchi, T
  • Organizer: The 2nd Subaru International Conference "Exoplanets and disks : Their Formation and Diversity"
  • Place of Presentation: Keauhou, Hawaii, USA
  • Year and Date: 20090309-12
• [Presentation] Growth of Settling Dust Particles in Turbulent Di (2008)
  • Author(s): Takeuchi, T
  • Organizer: 5th Spitzer Conference "New Light on Young Stars : Spitzer's View of Circumstellar Disks"
  • Place of Presentation: Pasadena Hilton, CA, USA
  • Year and Date: 20081026-30
• [Presentation] 乱流円盤中で沈殿しながら合体成長するダストの数値計算 (2008)
  • Author(s): 竹内拓
  • Organizer: 日本天文学会秋期年会
  • Place of Presentation: 岡山理科大学
  • Year and Date: 20080911-13
• [Book] 現代の天文学第11巻 (2009)
  • Author(s): 相川祐理
  • Total Pages: 212-232
  • Publisher: 日本評論社
• [Book] Small Bodies in Planetary Systems (2009)
  • Author(s): Takeuchi T.
  • Total Pages: 1-35
  • Publisher: Springer-Verlag GmbH