トップ   新規 一覧 単語検索 最終更新   ヘルプ   最終更新のRSS

Planet のバックアップ(No.80)


惑星セミナー2019

惑星セミナーは原則として毎週木曜日の14:00から理論部セミナー室で開催しています。
astro-phセミナーは毎週金曜日の12:00から理論部セミナー室で開催しています。

Schedule & History

2018年度 2017年度 2016年度 2015年度 2014年度

日程発表タイトルRemarks
前期 第1回 4/11 14:30-Shinsuke Takasao3D MHD simulations of Inner Protoplanetary Disks14:30
前期 第2回 4/18 14:00-Carina Heinreichsberger (Universität Wien)Terrestrial or Gaseous? A classification of exoplanets according to density, mass and radius
前期 第3回 4/25 14:00-Kazunari IwasakiChemistry in Debris Disks
前期 第4回 5/16 14:30-Yuhito Shibaike (Tokyo Tech)A new formation scenario for the Galilean satellites14:30
前期 第5回 5/23 15:30-Yuji Matsumoto (ASIAA)The orbital stability of planets in resonances considering the evolution of mass ratio15:30
前期 第6回 6/13 14:00-Hiroaki Kaneko (Tokyo Tech)TBA
前期 第7回 6/20 14:00-Yuhiko Aoyama (University of Tokyo)TBA
4/18 Carina Heinreichsberger, Terrestrial or Gaseous? A classification of exoplanets according to density, mass and radius
When looking at Exoplanet Archives the class of a planet is not given. Therefore I tried to find an easy and fast way to classify exoplanets using only density, mass and radius. In this talk I will discuss the formation theory of Planets to explain the boundaries between the different classes (gas, terrestrial) and show the results of my empirical study.
5/16 Yuhito Shibaike, A new formation scenario for the Galilean satellites
It is generally accepted that the four major (Galilean) satellites formed out of the gas disk that accompanied Jupiter’s formation. I will discuss a new formation scenario for the Galilean satellites, based on the capture of several planetesimal seeds and subsequent slow accretion of pebbles. Our slow-pebble-accretion scenario can reproduce the following characteristics: (1) the mass of all the Galilean satellites; (2) the orbits of Io, Europa, and Ganymede captured in mutual 2:1 mean motion resonances; (3) the ice mass fractions of all the Galilean satellites; (4) the unique ice-rock partially differentiated Callisto and the complete differentiation of the other satellites.