Astrophysicist working on exoplanets, gravitational microlensing, and differentiable scientific computing
JSPS Postdoctoral Research Fellow (PD) at the Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA).
I study exoplanet populations through gravitational microlensing, infrared astronomy, and statistical data analysis. I also develop GPU-accelerated, differentiable software for efficient astrophysical inference.
- Exoplanet demographics — occurrence rates and population-level constraints
- Gravitational microlensing — planetary events, higher-order effects, and survey science
- Infrared astronomy — observations and astronomical data analysis
- Scientific computing — JAX, automatic differentiation, GPU acceleration, and Bayesian inference
microJAX is a fully differentiable, GPU-accelerated JAX library for modeling finite-source gravitational microlensing light curves from binary- and triple-lens systems. It provides gradients with respect to model parameters and is designed for gradient-based Bayesian inference, including Hamiltonian Monte Carlo and variational inference.
Documentation · PyPI · Methods paper · Zenodo
microJAX is under active development. Bug reports and contributions are welcome.
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Miyazaki, S. & Kawahara, H. (2025)
microJAX: A Differentiable Framework for Microlensing Modeling with GPU-Accelerated Image-Centered Ray Shooting
The Astrophysical Journal, 994, 144. -
Miyazaki, S. & Masuda, K. (2023)
Evidence that the Occurrence Rate of Hot Jupiters around Sun-like Stars Decreases with Stellar Age
The Astronomical Journal, 166, 209. -
Miyazaki, S. et al. (2021)
Revealing Short-period Exoplanets and Brown Dwarfs in the Galactic Bulge Using the Microlensing Xallarap Effect with the Nancy Grace Roman Space Telescope
The Astronomical Journal, 161, 84.
For a complete publication list, see Google Scholar or ORCID.
- Email:
miyazaki [at] ir.isas.jaxa.jp - Website: sites.google.com/view/shotamiyazaki/