談話会 | 2026年度

定例の場合
・金曜日午後4時～5時（毎週行なうわけではありません）
・理学研究科4号館 5階 504号室（宇宙物理学教室講義室）
という時刻・場所で行なっています。 談話会でのトークを考えていらっしゃる方は、どの教室スタッフにでも良いので、コンタクトをお願いします。

世話人 Host: Herman Lee (email: herman_at_kusastro.kyoto-u.ac.jp)

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第668回
Speaker: Jonay I. Gonzalez Hernandez (Instituto de Astrofísica de Canarias)
Date: 6/9 Tuesday
Time: 13:30 – 15:00
Place: Room 504 seminar room, building 4
Language: English
Title: TBD
Abstract: TBD

第667回
Speaker: Raphael Hirschi (Keele University)
Date: 4/13 Monday
Time: 9:30 – 10:30
Place: Science Seminar house
Language: English
Title: Predicting the evolution and fate of massive stars in 1 and 3D
Abstract: In this colloquium, I will start by briefly reviewing the importance of stars in the Universe. I will then discuss how we can re-create stars on computers using a range of simulations using a few hours on a laptop to months on supercomputers. I will explain how these simulations help us understand and predict the structure, fate and impact of massive stars. In particular, I will present recent work studying how mass and rotation affect their fate across cosmic times and compare the predicted black-hole mass distribution to the latest gravitational waves detections from the LVK collaboration. I will then introduce the 321D (3 to 1-dimension) loop, a framework to improve 1D stellar evolution models using very detailed 3D hydrodynamic simulations.

第666回
Speaker: Vera Delfavero (Canadian Institute for Theoretical Astrophysics, University of Toronto)
Date: 4/2 Thursday
Time: 16:00 – 17:00
Place: Room 504 seminar room, building 4
Language: English
Title: Simulating Compact Binary Mergers and Gravitational Wave Detections from a Synthetic Universe
Abstract: For the past decade, the LIGO/Virgo/KAGRA (LVK) instruments have detected gravitational waves from merging black holes and neutron stars out to cosmological distances. Population synthesis approaches have simulated the formation channels for such events from isolated binary evolution and various dynamical environments. In this talk I discuss the methods I use to combine different population synthesis codes in order to construct compact binary populations on an observer’s light cone, treating the evolution of star formation and galaxy populations consistently between simulations representing different astrophysical assumptions.