RadVel: The Radial Velocity Modeling Toolkit

Abstract

RadVel is an open source Python package for modeling Keplerian orbits in radial velocity (RV) time series. RadVel provides a convenient framework to fit RVs using maximum a posteriori optimization and to compute robust confidence intervals by sampling the posterior probability density via Markov Chain Monte Carlo (MCMC). RadVel allows users to float or fix parameters, impose priors, and perform Bayesian model comparison. We have implemented realtime MCMC convergence tests to ensure adequate sampling of the posterior. RadVel can output a number of publication-quality plots and tables. Users may interface with RadVel through a convenient command-line interface or directly from Python. The code is object-oriented and thus naturally extensible. We encourage contributions from the community. Documentation is available at http://radvel.readthedocs.io.

prepared for resubmission to PASP

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• TOI-2322: two transiting rocky planets close to the stellar rotation period and its first harmonic
• A Trio of Giant Planets Orbiting Evolved Star HD 184010
• Separated twins or just siblings? A multi-planet system around an M dwarf including a cool sub-Neptune
• Gaia Astrometry and MIKE+PFS Doppler Data Joint Analysis Reveals that HD 175167b is a Massive Cold Jupiter
• Bright Spectroscopic Binaries: II. A study of five systems with orbital periods of P < 500 days
• Characterizing planetary systems with SPIRou: Detection of a sub-Neptune in a 6-day period orbit around the M dwarf Gl 410
• Characterization of low-mass companions to $\text{Kepler}$ objects of interest observed with APOGEE-N
• The HD 217107 Planetary System: Twenty Years of Radial Velocity Measurements
• Radial velocity analysis of stars with debris discs
• RedDots: Planetary masses in the GJ1061 system from planet-planet interaction
• Orbital Refinement and Stellar Properties for the HD 9446, HD 43691, and HD 179079 Planetary Systems
• The SPIRou Legacy Survey: near-infrared and optical radial velocity analysis of Gl 480 and Gl 382 using SPIRou, HARPS and CARMENES spectrographs
• AU Pegasi revisited: period evolution and orbital elements of a peculiar Type II Cepheid
• Stacked Periodograms as a Probe of Exoplanetary Populations
• Yet another star in the Albireo system -- The discovery of Albireo Ad
• True Masses using RV data with Hipparcos and Gaia Astrometry
• Discovery of a Nearby Habitable Zone Super-Earth Candidate Amenable to Direct Imaging
• PLATOSpec: a precise spectrograph in support of space missions
• OrbDot: A Python package for studying the secular evolution of exoplanet orbits
• SPORES-HWO. II. Companion Mass Limits and Updated Planet Properties for 120 Future Exoplanet Imaging Targets from 35 yr of Precise Doppler Monitoring
• The California Legacy Survey I. A Catalog of 178 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades
• Search for giant planets in M67 V: a warm Jupiter orbiting the turn-off star S1429
• Few Observation Binary Orbit Solver (FOBOS) from two (or more) astrometric observations
• The TESS-Keck Survey. XIX. A Warm Transiting Sub-Saturn Mass Planet and a non-Transiting Saturn Mass Planet Orbiting a Solar Analog
• TOI-1259Ab: A Warm Jupiter Orbiting a K-dwarf White-Dwarf Binary is on a Well-aligned Orbit
• Gas-depleted planet formation occurred in the four-planet system around the red dwarf LHS 1903
• Uncovering the Rapidly Evolving Orbits of the Dynamic TOI-201 System
• HARPS-N Reveals a Well-aligned Orbit for the Highly Eccentric Warm Jupiter TOI-4127 b
• The Brown Dwarf Kinematics Project (BDKP). V. Radial and Rotational Velocities of T Dwarfs from Keck/NIRSPEC High-Resolution Spectroscopy
• A Community Exoplanet Imaging Data Challenge for Roman CGI and Starshade Rendezvous
• $\mathtt{KOBEsim}$: a Bayesian observing strategy algorithm for planet detection in radial velocity blind-search surveys
• Characterizing the WASP-4 system with TESS and radial velocity data: Constraints on the cause of the hot Jupiter's changing orbit and evidence of an outer planet
• Identifying Hierarchically Triple Star Systems with Gaia DR3 and LAMOST
• Improving exoplanet mass characterisation with Bayesian model selection using the Learned Harmonic Mean Estimator
• Revisiting BD-06 1339b: A Likely False Positive Caused by Stellar Activity
• POSEIDON II: The Anti-Aligned Orbit of the Warm Neptune TOI-1710 A b
• TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf
• The TESS-Keck Survey. XI. Mass Measurements for Four Transiting sub-Neptunes orbiting K dwarf TOI-1246
• Syntriod: A Robust Initial Parameter Estimator for Radial Velocity Curve Solutions Beyond Conventional Sampling Limits
• The California Legacy Survey III. On The Shoulders of (Some) Giants: The Relationship between Inner Small Planets and Outer Massive Planets
• Asteroseismology of iota Draconis and Discovery of an Additional Long-Period Companion
• TOI-333b: A Neptune Desert planet around a F7V star
• TOI-1518b: A Misaligned Ultra-hot Jupiter with Iron in its Atmosphere
• Discovery of a multi-planetary system orbiting the aged Sun-like star HD 224018
• Discovery of the pre-main-sequence eclipsing binary MML 48
• Improved characterization of the TOI-2141 system: a dense sub-Neptune with non-transiting inner and outer companions
• Spectroscopic Characterization of LOFAR Radio-emitting M dwarfs