Colloquium | FY 2026
Regular Schedule:
• Time: Fridays, 4:00 PM – 5:00 PM (not held weekly)
• Location: Room 504, 5th Floor, Building 4, Graduate School of Science (Astrophysics Lecture Room)
If you consider giving a talk at the colloqioum, plase feel free to contact any of the faculty of members.
Host: Herman Lee (email: herman_at_kusastro.kyoto-u.ac.jp)
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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
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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.
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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.