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

微行星形成过程建模及其与类织女星观测结果的比较

• 批准号: 20540232
• 负责人: TAKEUCHI Taku
• 金额: $ 2.75万
• 依托单位: Tokyo Institute of Technology (2010-2011)Hokkaido University (2008-2009)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20540232/
• 关键词: 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; 太陽系外惑星; ダスト

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.

我们研究星子的形成过程。以下影响进行了研究：湍流引起的尘埃层形成在中平面的气体盘，自重的尘埃层，颗粒电荷，碰撞破碎。我们推导出了星子形成所需的气体盘的性质。为了将星子形成理论与类织女星的观测结果进行比较，我们研究了恒星辐射和尘埃盘气体对尘埃盘结构的影响。我们还进行了尘埃粒子高速碰撞的实验研究，并得出碰撞碎片的尺寸分布。最后，我们从过渡盘的观测中导出了气盘的性质，过渡盘被认为是类织女星盘的前一阶段。

项目成果

PLANETARY CORE FORMATION WITH COLLISIONAL FRAGMENTATION AND ATMOSPHERE TO FORM GAS GIANT PLANETS

• DOI: 10.1088/0004-637x/738/1/35
• 发表时间: 2011-06
• 期刊: The Astrophysical Journal
• 作者: H. Kobayashi;Hidekazu Tanaka;A. Krivov

Growth of Cosmic Dust Aggregates and Reexamination of Particle Interaction Models

宇宙尘埃聚集体的生长和粒子相互作用模型的重新检验

• 发表时间: 2012
• 期刊: Progress of Theoretical Physics Supplement
• 作者: 田中有弥;野口裕;石井久夫;岡本卓也;Tom Suyama;Hidekazu Tanaka
• 通讯作者: Hidekazu Tanaka

Electrostatic Barrier Against Dust Growth in Protoplanetary Disks.T.Classifying the Evolution of Size Distribution

防止原行星盘中灰尘生长的静电屏障.T.尺寸分布演化的分类

• 发表时间: 2011
• 期刊: The Astrophysical Journal 731(in press)
• 作者: Okuzumi;S.;Tanaka;H.;Takeuchi;T.;Sakagami;M-a.
• 通讯作者: M-a.

Silicate Dust Size Distribution from Hypervelocity Collisions : Implications for Dust Production in Debris Disks

超高速碰撞产生的硅酸盐粉尘尺寸分布：对碎片盘中粉尘产生的影响

• 发表时间: 2011
• 期刊: The Astrophysical Journal Letters
• 作者: 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.
• 通讯作者: T.

Disk-Planet Interaction and Planetesimal formation

盘-行星相互作用和星子形成

• 发表时间: 2011
• 作者: Izumi Hachisu;Mariko Kato;Hideyuki Saio;Ken' ichi Nomoto;竹内拓
• 通讯作者: 竹内拓