Auto-differentiable line-by-line spectral modeling of exoplanets/brown dwarfs using JAX.
Project description
ExoJAX
Differentiable spectral modelling of exoplanets/brown dwarfs/M dwarfs using JAX! Read the docs 🐕. In short, ExoJAX allows you to do gradient based optimizations, HMC-NUTS, and SVI using the latest database.
ExoJAX is at least compatible with
ExoJAX Classes
- Databases: *db (mdb: molecular, adb: atomic, cdb:continuum, pdb: particulates)
- Opacity Calculators: opa (Voigt profile, CIA, Mie, Rayleigh scattering etc)
- Atmospheric Radiative Transfer: art (emission w, w/o scattering, refelction, transmission)
- Spectral Operator: sop (planet rotation, instrumental boradening)
- Atompsheric Microphysics: amp (clouds etc)
Get Started
See this page for the first step!
Real Examples (external)
- :star: exojaxample_WASP39b : An example of HMC-NUTS for actual hot Saturn (JWST/ERS, NIRSPEC/G395H)
- :star: exojaxample_jupiter : An example of HMC-NUTS for actual Jupiter reflection spectrum
References
- Paper I: Kawahara, Kawashima, Masuda, Crossfield, Pannier, van den Bekerom, ApJS 258, 31 (2022)
- Paper II: in prep
License
🐈 Copyright 2020-2024 ExoJAX contributors. ExoJAX is publicly available under the MIT license.
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