ExoRM 3.1.1

a model for the mass of an exoplanet given the radius

ExoRM

ExoRM is a model for the mass of an exoplanet given the radius

• HomePage: https://github.com/kzhu2099/ExoRM
• Issues: https://github.com/kzhu2099/ExoRM/issues

Author: Kevin Zhu

Features

• continuous radius-mass relationship
• smooth with lower residuals
• simple usage, log10 and linear
• method to create your own model
• prediction interval

Installation

To install ExoRM, use pip: pip install ExoRM.

However, many prefer to use a virtual environment (or any of their preferred choice).

macOS / Linux:

# make your desired directory
mkdir /path/to/your/directory
cd /path/to/your/directory

# setup the .venv (or whatever you want to name it)
pip install virtualenv
python3 -m venv .venv

# install ExoRM
source .venv/bin/activate
pip install ExoRM

deactivate # when you are completely done

Windows CMD:

# make your desired directory
mkdir C:path\to\your\directory
cd C:path\to\your\directory

# setup the .venv (or whatever you want to name it)
pip install virtualenv
python3 -m venv .venv

# install ExoRM
.venv\Scripts\activate
pip install ExoRM

deactivate # when you are completely done

Usage

To first begin using ExoRM, the data and model must be initialized. This is due to the constant discovery of new exoplanets, adding to the data. You may also call these at any time to update the model.

Simply run get_data() and initialize_model(). Note: import those by using from ExoRM.get_data import get_data() and from ExoRM.initialize_model() import initialize_model(). A plot of the model will be shown for you to see. Both are stored in your OS's Application Data for ExoRM. ExoRM provides built in functions to retrieve from this folder.

To use the model, call ExoRM.load_model() which returns the model from the filepath. If you wish, you may use model.save(...) to save it to your own directory.

Note that all files saved are located in /Users/<username>/Library/Application Support/ExoRM for macOS and C:\Users\<username>\AppData\Local\ExoRM\ExoRM for windows.

The model supports log10 and linear scale in earth radii. When using the model([...]), .__call__([...]), or .predict([...]), the log10 scale is used. Linear predictions are used in .predict_linear([...]).

The high amount of uncertainty can be accessed from ExoRM. An exponential curve fit is used to estimate the squared errors, and square root of the model at any point is the RMSE (standard deviation of the errors). Generally, the log error increases as the log radius increases. Estimate the error by using model.error([...]) and model.linear_error([...]), which returns the 2nd standard deviation, with a smooth transition to the 3rd during extrapolations.

An example is seen in the example.ipynb. Deep analysis is seen in comparison.ipynb, showing statistical results and a comparison with Forecaster.

Additional notes

ExoRM has an implementation of Forecaster for according to the NASA Exoplanet Archive.

Forecaster: https://github.com/chenjj2/forecaster NASA Exoplanet Archive implementation: https://exoplanetarchive.ipac.caltech.edu/docs/pscp_calc.html

License

The License is an MIT License found in the LICENSE file.