Dependence of extrasolar planetary systems on host stars' metallicity

太阳系外行星系统对主星金属丰度的依赖性

• 批准号: 20244013
• 负责人: IDA Shigeru
• 金额: $ 29.87万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 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/en/grant/KAKENHI-PROJECT-20244013/
• 关键词: 理論天文学; 系外惑星; 惑星形成; 恒星; 木星型惑星; 地球型惑星

More than 750 extrasolar planets have been discovered, as well as more than 2300 candidates by Kepler space telescope, which motivates statistical discussions of planets and planetary systems. Here we investigated dependence of planetary systems on metallicity of the host stars. N-body and fluid dynamical simulations for planet-planet scattering and collisions have been carried out. Combining these results, we also performed Monte Carlo simulations to find that in a metal-rich disk around a metal-rich star, multiple gas giants are formed and they undergo orbital stability to pump up orbital eccentricities. We also promoted radial velocity surveys and construct a transit follow-up network involving amateurs and students to study the problem both from theory and observation.

开普勒太空望远镜已经发现了750多颗系外行星，以及2300多颗候选行星，这激发了关于行星和行星系的统计讨论。在这里，我们研究了行星系统对主恒星金属丰度的依赖。进行了行星-行星散射和碰撞的n体和流体动力学模拟。结合这些结果，我们还进行了蒙特卡罗模拟，发现在一个富含金属的恒星周围的富含金属的圆盘上，形成了多个气态巨行星，它们经历了轨道稳定性，从而提高了轨道偏心率。我们还推动径向速度测量，并建立了一个由业余爱好者和学生参与的过境跟踪网络，从理论和观测两个方面研究问题。

项目成果

Substellar Companions to Evolved Intermediate-Mass Stars: HD 145457 and HD 180314

• DOI: 10.1093/pasj/62.4.1063
• 发表时间: 2010-05
• 期刊: Publications of the Astronomical Society of Japan
• 影响因子: 2.3
• 作者: B. Sato;M. Omiya;Yujuan Liu;H. Harakawa;H. Izumiura;E. Kambe;E. Toyota;D. Murata;Byeong-Cheol Lee;S. Masuda;Y. Takeda;Michitoshi Yoshida;Y. Itoh;H. Ando;E. Kokubo;S. Ida;Gang Zhao;I. Han

N2K コンソーシアムによる系外惑星探査

N2K 联盟的系外行星探索

• 发表时间: 2009
• 作者: 原川紘季;佐藤文衛;井田茂;堀安範;大宮正士;豊田英里;Debra A. Fischer(SanFrancisco State University)
• 通讯作者: Debra A. Fischer(SanFrancisco State University)

N-BODY SIMULATIONS OF PLANETARY ACCRETION AROUND M DWARF STARS

• DOI: 10.1088/0004-637x/699/1/824
• 发表时间: 2009-04
• 期刊: The Astrophysical Journal
• 作者: M. Ogihara;S. Ida

A POPULATION OF VERY HOT SUPER-EARTHS IN MULTIPLE-PLANET SYSTEMS SHOULD BE UNCOVERED BY KEPLER

• DOI: 10.1088/2041-8205/724/1/l53
• 发表时间: 2010-10
• 期刊: The Astrophysical Journal Letters
• 作者: K. Schlaufman;D. Lin;D. Lin;Shigeru Ida

A Possible Spin-Orbit Misalignment in the Transiting Eccentric Planet HD 17156b

凌日偏心行星 HD 17156b 中可能出现的自旋轨道错位

• 发表时间: 2008
• 期刊: Publications of the Astronomical Society of Japan Letters 60
• 作者: Narita;et al.
• 通讯作者: et al.