# 'exoplanet': Gradient-based probabilistic inference for exoplanet data & other astronomical time series

@article{ForemanMackey2021exoplanetGP,
title={'exoplanet': Gradient-based probabilistic inference for exoplanet data \& other astronomical time series},
author={Daniel Foreman-Mackey and Rodrigo Luger and Eric Agol and Thomas Barclay and Luke G. Bouma and Timothy D. Brandt and Ian Czekala and Trevor J. David and Jiayin Dong and Emily A. Gilbert and Tyler A. Gordon and Christina L. Hedges and Daniel R. Hey and Brett M. Morris and Adrian. M. Price-Whelan and Arjun B. Savel},
journal={J. Open Source Softw.},
year={2021},
volume={6},
pages={3285}
}
• Published 5 May 2021
• Physics
• J. Open Source Softw.
1 Center for Computational Astrophysics, Flatiron Institute, New York, NY, USA 2 Virtual Planetary Laboratory, University of Washington, Seattle, WA, USA 3 Department of Astronomy, University of Washington, University of Washington, Seattle, WA, USA 4 Center for Space Sciences and Technology, University of Maryland, Baltimore County, Baltimore, MD, USA 5 Department of Astrophysical Sciences, Princeton University, Princeton, NJ, USA 6 Department of Physics, University of California, Santa…
21 Citations

## Figures from this paper

Autodifferentiable Spectrum Model for High-dispersion Characterization of Exoplanets and Brown Dwarfs
• Physics, Geology
The Astrophysical Journal Supplement Series
• 2022
We present an autodifferentiable spectral modeling of exoplanets and brown dwarfs. This model enables a fully Bayesian inference of the high-dispersion data to fit the ab initio line-by-line spectral
V1298 Tau with TESS: Updated Ephemerides, Radii, and Period Constraints from a Second Transit of V1298 Tau e
• Physics, Geology
The Astrophysical Journal Letters
• 2022
V1298 Tau is a young (20–30 Myr) solar-mass K star hosting four transiting exoplanets with sizes between 0.5 and 0.9 R J. Given the system’s youth, it provides a unique opportunity to understand the
An Aligned Orbit for the Young Planet V1298 Tau b
• Geology, Physics
The Astronomical Journal
• 2022
The alignment of planetary orbits with respect to the stellar rotation preserves information on their dynamical histories. Measuring this angle for young planets helps illuminate the mechanisms that
A 20 Second Cadence View of Solar-type Stars and Their Planets with TESS: Asteroseismology of Solar Analogs and a Recharacterization of π Men c
• Geology, Physics
The Astronomical Journal
• 2022
We present an analysis of the first 20 second cadence light curves obtained by the TESS space telescope during its extended mission. We find improved precision of 20 second data compared to 2 minute
Eureka!: An End-to-End Pipeline for JWST Time-Series Observations
• Physics
• 2022
1 BAER Institute, NASA Ames Research Center, Moffet Field, CA 94035, USA 2 Department of Physics, University of Warwick, Gibbet Hill Road, CV4 7AL Coventry, UK 3 Department of Physics and Astronomy,
TOI-1696 and TOI-2136: Constraining the Masses of Two Mini-Neptunes with the Habitable-Zone Planet Finder
• Physics, Geology
The Astronomical Journal
• 2022
We present the validation of two planets orbiting M dwarfs, TOI-1696b and TOI-2136b. Both planets are mini-Neptunes orbiting nearby stars, making them promising prospects for atmospheric
An Updated Ephemeris for K2-138 d
• Physics, Geology
Research Notes of the AAS
• 2022
K2-138 d (EPIC 245950175 d) is one of five planets in a chain of 3:2 mean motion resonances discovered by Christiansen et al. in K2 Campaign 12. An additional planet, confirmed with the Spitzer Space
NEID Rossiter–McLaughlin Measurement of TOI-1268b: A Young Warm Saturn Aligned with Its Cool Host Star
• Physics, Geology
The Astrophysical Journal Letters
• 2022
Close-in gas giants present a surprising range of stellar obliquity, the angle between a planet’s orbital axis and its host star’s spin axis. It is unclear whether the obliquities reflect the
TESS Revisits WASP-12: Updated Orbital Decay Rate and Constraints on Atmospheric Variability
• Physics, Geology
The Astronomical Journal
• 2022
After observing WASP-12 in the second year of the primary mission, the Transiting Exoplanet Survey Satellite (TESS) revisited the system in late 2021 during its extended mission. In this paper, we
Accurate Modeling of Grazing Transits Using Umbrella Sampling
Grazing transits present a special problem for statistical studies of exoplanets. Even though grazing planetary orbits are rare (due to geometric selection effects), for many low to moderate

## References

SHOWING 1-10 OF 48 REFERENCES
Automatic Differentiation Variational Inference
• Computer Science
J. Mach. Learn. Res.
• 2017
Automatic differentiation variational inference (ADVI) is developed, where the scientist only provides a probabilistic model and a dataset, nothing else, and the algorithm automatically derives an efficient Variational inference algorithm, freeing the scientist to refine and explore many models.
The No-U-turn sampler: adaptively setting path lengths in Hamiltonian Monte Carlo
• Computer Science
J. Mach. Learn. Res.
• 2014
The No-U-Turn Sampler (NUTS), an extension to HMC that eliminates the need to set a number of steps L, and derives a method for adapting the step size parameter {\epsilon} on the fly based on primal-dual averaging.
Analytic Planetary Transit Light Curves
• 2020
Analytic Planetary Transit Light Curves and Derivatives for Stars with Polynomial Limb Darkening
• Physics
The Astronomical Journal
• 2020
We derive analytic, closed-form solutions for the light curve of a planet transiting a star with a limb-darkening profile that is a polynomial function of the stellar elevation, up to an arbitrary
A Coplanar Circumbinary Protoplanetary Disk in the TWA 3 Triple M Dwarf System
• Physics, Geology
The Astrophysical Journal
• 2021
We present sensitive ALMA observations of TWA 3, a nearby, young (∼10 Myr) hierarchical system composed of three pre-main-sequence M3–M4.5 stars. For the first time, we detected 12CO and 13CO J = 2–1
Flare Rates, Rotation Periods, and Spectroscopic Activity Indicators of a Volume-complete Sample of Mid- to Late-M Dwarfs within 15 pc
• Physics
The Astrophysical Journal
• 2020
We present a study of flare rates, rotation periods, and spectroscopic activity indicators of 125 single stars within 15 parsecs and with masses between 0.1 and 0.3 M⊙ observed during the first year
A Fast, Two-dimensional Gaussian Process Method Based on Celerite: Applications to Transiting Exoplanet Discovery and Characterization
• Physics, Geology
The Astronomical Journal
• 2020
Gaussian processes (GPs) are commonly used as a model of stochastic variability in astrophysical time series. In particular, GPs are frequently employed to account for correlated stellar variability
Physics of Eclipsing Binaries. V. General Framework for Solving the Inverse Problem
• Computer Science
The Astrophysical Journal Supplement Series
• 2020
A general framework for defining and handling distributions on parameters, and utilizing multiple different estimation, optimization, and sampling algorithms is introduced which supports multiple forward-models, including the robust model built into PHOEBE itself.
A planet within the debris disk around the pre-main sequence star AU Mic
• Physics, Geology
Nature
• 2020
The authors' observations of a planet co-existing with a debris disk offer the opportunity to test the predictions of current models of planet formation and evolution, and a transiting planet with a period of about 8.5 days and a radius 0.4 times that of Jupiter is reported within the debris disk around the star AU Microscopii.
Array programming with NumPy
• Physics
Nat.
• 2020
How a few fundamental array concepts lead to a simple and powerful programming paradigm for organizing, exploring and analysing scientific data is reviewed.