NbodyGradient

A fast, differentiable N-body integrator for modeling transiting exoplanets, and more.

This package provides a simple user-interface to carry out N-body simulations and compute the derivatives of the outputs with respect to the initial conditions. The current version of the code implements the following:

• Integrators:
  • AHL21 (4th-order Symplectic; Agol, Hernandez, & Langford 2021)
• Initial Conditions:
  • Cartesian coordinates (CartesianIC)
  • Orbital elements (ElementsIC)
• Output Models:
  • Transit times (TransitTiming)
  • Transit times, impact parameter, and sky-plane velocity (TransitParameters)

Getting Started

First, you'll need to add the package. Using the Julia REPL, run:

pkg> add NbodyGradient

If you'd like to use the developement version of the code, run:

pkg> add NbodyGradient#master

Then, use like any other Julia package

using NbodyGradient

See the Tutorials page for basic usage.