ExoplanetPy 0.0.1

Package for Multiple exoplanet system modelling

ExoplanetPy

ExoplanetPy is a python package for modelling the transit light curves of systems with multiple exoplanets orbiting around their host stars.
To obtain transit curves, simply set up the Keplerian orbital elements for each planet in the system.

The Planet() class handles each planet's orbital elements, and the System() class can be used to plot the final transit curves.

The following orbital elements are set up:

Variable	Element
e	eccentricity
a	semi-major axis
omega	argument of periapsis (ω)
Omega	longitude of ascending node (Ω)
i	orbital inclination
r_p	planet:star radius

Each Planet() can have different initial true anomaly (ν) values, varied by the first_periastron time argument.

Usage

Modules can be accessed using the following imports.

from ExoplanetPy import Planet
from ExoplanetPy import System

Define a single Planet() and input as planet_list arguments in System().
Limb darkening models are chosen in the plot() method.

p1 = Planet(e=0.0, a=8, omega=0, Omega=0, i=89.9, r_p=0.1, first_periastron=0.0)
sys = System(star_prop={'Mass': 4}, planet_list=[p1], sort=True)
sys.plot(model='Quadratic', normalise=True)

Additional Planet() objects are inputted as planet_list argument in System().

p1 = Planet(e=0.0, a=8, omega=0, Omega=0, i=89.9, r_p=0.1, first_periastron=0.0)
p2 = Planet(e=0.0, a=2, omega=0, Omega=0, i=89.9, r_p=0.05, first_periastron=0.0)
sys = System(star_prop={'Mass': 4}, planet_list=[p1,p2], sort=True)
sys.plot(model='Quadratic', normalise=True)

Dependencies

ExoplanetPy has the following dependencies:

• NumPy
• SciPy
• Matplotlib (produce plots)
• Seaborn (stylize plots)

License

MIT License
© 2020 ExoplanetPy