Asymptotics in astrophysics and cosmology

RIKEN iTHEMS-Kyoto University joint workshop on asymptotics in astrophysics and cosmology

This joint workshop will bring together physicists and mathematicians who work with asymptotics and perturbation theory techniques. This includes theorists in cosmology, high energy physics, quantum gravity, solar physics, astrophysics.

Workshop overview

Over three days, there will be approximately 15 invited (1 hour slot) or contributed (20-30 min slot) talks about:

• Fundamental asymptotics and perturbation theory techniques used in theoretical physics.
• Various applications of asymptotics and perturbation theory techniques in (wave transport or oscillation related) astrophysics and cosmology eigenvalue problems. 

The workshop will also feature hands-on Mathematica and Python tutorials introducing:

• Practical use of WKB methods in applied mathematics for any “Schrodinger-like” wave equations
• Resummation methods in high energy theory
• Deriving normal modes in stars, and their application to tidal evolution in binary star or planet systems.
• Eigenvalue problems in core collapse supernova theory.

Register here (Early registration deadline: Monday 15th December 2025 for full consideration of travel support requests, abstract submission, and onsite catering)

Goals of workshop

Participants will be introduced to various applications of asymptotics and perturbation theory in astrophysics and cosmology from the technical applied mathematics perspective.

Presentations and tutorials held in the workshop should equip participants to search for problems (in stellar structure and evolution, black hole astrophysics) which can be solved using existing asymptotics and perturbation theory methods in theoretical physics problems (e.g. quantum field theory, general relativity), and vice versa.

With this, the goal of the workshop is to facilitate concrete projects between researchers from RIKEN iTHEMS and other domestic and international institutes who have an interest in applying these general mathematical physics to suitable astrophysics and cosmology problems.

Organisers

Christy Kelly (RIKEN iTHEMS)
★ Masazumi Honda (RIKEN iTHEMS)
★ Lucy McNeill (Kyoto University)
Ryo Namba (RIKEN iTHEMS)
Naritaka Oshita (Kyoto University)

(* = ★ main organisers, contact masazumi.honda~at~sign~riken.jp, mcneill.lucy.7p~at~sign~kyoto-u.ac.jp )