spectral characterization and inference for exoplanet science

species is a toolkit for atmospheric characterization of directly imaged exoplanets. It provides a coherent framework for spectral and photometric analysis which builds on publicly-available data and models from various resources.

There are tools available for inference of atmospheric and evolutionary parameters, synthetic photometry, interpolation of model grids, color-magnitude and color-color diagrams, empirical spectral analysis, flux calibration, emission line analysis, and more.

The package is available on PyPI <https://pypi.org/project/species/>_ and is developed and maintained on GitHub <https://github.com/tomasstolker/species>_.

Documentation can be found at http://species.readthedocs.io.

There are several Jupyter notebooks with tutorials for various types of analyses and functionalities.

Please cite Stolker et al. (2020) whenever results from species are used in a publication. Please also make sure to give credit to the relevant papers regarding the use of the publicly available data that species benefits from.

Contributions are welcome so please consider forking the repository and creating a pull request. Bug reports and feature requests can be provided by creating an issue on the GitHub page.

Copyright 2026 Tomas Stolker and contributors.

species is distributed under the MIT License. See LICENSE for the terms and conditions.