Allesfitter: Flexible Star and Exoplanet Inference From Photometry and Radial Velocity

2020/03/31 by Maximilian N. Günther, Tansu Daylan
Computer Science · Engineering · Physics and Astronomy · #Algorithm #Artificial intelligence #Astronomical Observations and Instrumentation #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Bayesian probability #Blind Source Separation Techniques #Computer science #Exoplanet #Light curve #Markov chain Monte Carlo #Operating system #Photometry (optics) #Physics #Preprocessor #Python (programming language) #Radial velocity #Software #Stars #Stellar, planetary, and galactic studies #astro-ph.EP #astro-ph.IM #astro-ph.SR

paper · pdf · doi:10.3847/1538-4365/abe70e

36 pages, 15 figures, 9 tables, submitted to AAS journals

openalex publication_date 2020/03/31 · openalex created_date 2020/04/10 · arxiv created 2020/05/19 · arxiv updated 2021/05/05 · openalex updated_date 2026/08/06

Abstract

We present allesfitter, a public and open-source python software for flexible and robust inference of stars and exoplanets given photometric and radial velocity data. Allesfitter offers a rich selection of orbital and transit/eclipse models, accommodating multiple exoplanets, multi-star systems, transit-timing variations, phase curves, stellar variability, star spots, stellar flares, and various systematic noise models including Gaussian Processes. It features both parameter estimation and Bayesian model selection, allowing to easily run either a Markov Chain Monte Carlo (MCMC) or Nested Sampling fit. For novice users, a graphical user interface allows to specify all input and perform analyses; for python users, all modules can be readily imported in any existing scripts. Allesfitter also produces publication-ready tables, LaTeX commands, and figures. The software is publicly available (https://github.com/MNGuenther/allesfitter), pip-installable (pip install allesfitter) and well documented (www.allesfitter.com). Finally, we demonstrate the software's capabilities on several examples and provide updates to the literature where possible for Pi Mensae, TOI-216, WASP-18, KOI-1003 and GJ 1243.

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