Theories of Astrophysical Big Bangs 2025

We are pleased to announce an international workshop on theories of Astrophysical Big Bangs. The main topics of the workshop are listed below, although the topics are not limited to these areas. We aim to cover a broad range of astrophysical research concerning various types of cosmic explosions and compact objects.

Neutron Stars
Neutron Star Mergers
Gravitational Waves
Gamma-Ray Bursts
Supernovae
Supernova Remnants

This workshop aims to assemble leading experts in various fields of astrophysical big bangs for vibrant discussions and to foster new collaborations among participants.

Program (last updated 2025.02.17)

17Feb.
10:00-10:10 Opening Remarks by Hiro Nagataki (RIKEN)

Special Talk
10:10-11:10 (50+10) Daniel Kasen (U.C. Berkeley)
Radiative Transfer Modeling of Explosive Transients

NS mergers, Kilonovae, and Gravitational Waves
11:10-11:50 (30+10) Masaomi Tanaka (Tohoku U.)
Decoding light curves and spectra of kilonovae
11:50-12:30 (30+10) Kenta Hotokezaka (U. Tokyo)
Kilonova Nebular Emission

12:30-14:00 Lunch Break and Poster Session

14:00-14:40 (30+10) Kipp Cannon (U. Tokyo)
Selection Effects in Gravitational-Wave Observations
14:40-15:20 (30+10) Koutarou Kyutoku (Chiba U.)
Signature of hadron-quark crossover in binary-neutron-star mergers

15:20-15:50 Poster Presentations & Coffee Break

15:50-16:30 (30+10) Luca Baiotti (Osaka U.)
Investigating ultra-high-density equations of state through gravitational waves from binary neutron stars mergers

Supernovae & Gamma-Ray Bursts (Chair A. Mizuta)
16:30-17:10 (30+10) Nozomu Tominaga (NAOJ)
Transient studies using Subaru/Hyper Suprime-Cam
17:10-17:50 (30+10) Tianshu Wang (UCB)
Three-Dimensional Long-Term CCSN Simulations: New Insights and Challenges

18 Feb.
Gamma-Ray Bursts
9:00-9:30 (25+5) Akira Mizuta (RIKEN)
3D relativistic GRB jet propagation in collapsars
9:30-10:00 (25+5) Jin Matsumoto (Fukuoka U.)
Nonlinear dynamics of relativistic magnetized jet with field reversals
10:00-10:30 (25+5) Hirotaka Ito (RIKEN)
Numerical simulations of photospheric emission in GRBs
10:30-11:00 (25+5) Maria Dainotti (NAOJ)
GRBs and SNe Ia cosmology to cast the Hubble constant tension

11:00-11:30 Poster Presentations & Coffee Break

11:30-12:10 (30+10) Kunihito Ioka (Kyoto U.)
GRB Cocoon + Scattering in FRB

Neutron Stars
12:10-12:40 (25+5) Hajime Sotani (Kochi U.)
Supernova gravitational waves and asteroseismology

12:40-14:00 Lunch Break & Poster Presentations

14:00-14:30 (25+5) Akira Dohi (RIKEN)
Modeling of Clocked X-ray Bursters

Progenitor Stars
14:30-15:10 (30+10) Hideyuki Umeda (U. Tokyo)
Progenitors of low-mass Fe core collapse supernovae and properties of supernova explosions
15:10-15:40 (25+5) Lucy McNeill (Kyoto U.)
Finite temperature treatment of white dwarf merger progenitors

15:40-16:10 Poster Presentations & Coffee Break

Core-Collapse Supernovae
16:10-16:50 (30+10) Tomoya Takiwaki (NAOJ)
Diversity of explosion mechanisms of core-collapse supernovae
16:50-17:30 (30+10) Hiroki Nagakura (NAOJ)
Open issues in numerical modeling of core-collapse supernova
17:30-18:10 (30+10) Yudai Suwa (U. Tokyo)
Probing supernova interiors with neutrinos

18:30-21:00 Banquet & Poster Presentations

19 Feb.
Supernovae, Supernova Remnants, and Nucleosynthesis
10:00-10:40 (30+10) Ke-Jung Chen (ASIAA)
Supernovae of very massive stars
10:40-11:20 (30+10) Masaomi Ono (ASIAA)
Evolution of core-collapse supernovae from explosion to supernova remnant
11:20-12:00 (30+10) Hiroya Yamaguchi (JAXA)
XRISM view of supernova remnants
12:00-12:40 (30+10) Shiu-Hang Lee (Kyoto U.)
Super high-speed three-dimensional hydrodynamic simulations of supernova remnants and their applications in the era of microcalorimetric X-ray spectroscopy

12:40-14:00 Lunch Break

14:00-14:40 (30+10) Gilles Ferrand (U. Manitoba)
Typing thermonuclear explosions from observations of young supernova remnants
14:40-15:20 (30+10) Nobuya Nishimura (U. Tokyo)
Toward new nuclear astrophysics experiments for explosive nucleosynthesis in core-collapse supernovae
15:20-16:00 (30+10) Ryosuke Hirai (RIKEN)
Supernovae in binary systems

16:00-17:00 (60) Coffee Break and Free Discussion