orbitize!: A Comprehensive Orbit-fitting Software Package for the High-contrast Imaging Community

Abstract

orbitize! is an open-source, object-oriented software package for fitting the orbits of directly-imaged objects. It packages the Orbits for the Impatient (OFTI) algorithm and a parallel-tempered Markov Chain Monte Carlo (MCMC) algorithm into a consistent and intuitive Python API. orbitize! makes it easy to run standard astrometric orbit fits; in less than 10 lines of code, users can read in data, perform one fit using OFTI and another using MCMC, and make two publication-ready figures. Extensive pedagogical tutorials, intended to be navigable by both orbit-fitting novices and seasoned experts, are available on our documentation page. We have designed the orbitize! API to be flexible and easy to use/modify for unique cases. orbitize! was designed by members of the exoplanet imaging community to be a central repository for algorithms, techniques, and know-how developed by this community. We intend for it to continue to expand and change as the field progresses and new techniques are developed, and call for community involvement in this process. Complete and up-to-date documentation is available at orbitize.info.

9 pages, 4 figures. Submitted to AAS Journals

References in corpus (23)

• emcee: The MCMC Hammer
• A giant planet imaged in the disk of the young star Beta Pictoris
• EXOFAST: A fast exoplanetary fitting suite in IDL
• RadVel: The Radial Velocity Modeling Toolkit
• Chaotic star formation and the alignment of stellar rotation with disc and planetary orbital axes
• Dynamic temperature selection for parallel-tempering in Markov chain Monte Carlo simulations
• First direct detection of an exoplanet by optical interferometry; Astrometry and K-band spectroscopy of HR8799 e
• Precise Dynamical Masses of Directly Imaged Companions from Relative Astrometry, Radial Velocities, and Hipparcos-Gaia DR2 Accelerations
• Orbits for the Impatient: A Bayesian Rejection Sampling Method for Quickly Fitting the Orbits of Long-Period Exoplanets
• First light of the VLT planet finder SPHERE. I. Detection and characterization of the sub-stellar companion GJ 758 B
• On the misalignment of the directly imaged planet β Pictoris b with the system's warped inner disk
• Direct Imaging Discovery of a Jovian Exoplanet Within a Triple Star System
• VLT/SPHERE robust astrometry of the HR8799 planets at milliarcsecond-level accuracy Orbital architecture analysis with PyAstrOFit
• Resonant capture by inward migrating planets
• Radial Velocity Measurements of HR 8799 b and c with Medium Resolution Spectroscopy
• Reference star differential imaging of close-in companions and circumstellar disks with the NIRC2 vortex coronagraph at W.M. Keck Observatory
• Transiting exocomets detected in broadband light by TESS in the $\beta$ Pictoris system
• Long period planets from dynamical relaxation
• The Orbit of the Companion to HD 100453A: Binary-Driven Spiral Arms in a Protoplanetary Disk
• Hint of curvature in the orbital motion of the exoplanet 51 Eridani b using 3 years of VLT/SPHERE monitoring
• Improving Orbit Estimates for Incomplete Orbits with a New Approach to Priors -- with Applications from Black Holes to Planets
• Radial Velocity Discovery of an Eccentric Jovian World Orbiting at 18 au
• The Possible Astrometric Signature of a Planetary-mass Companion to the Nearby Young Star TW Piscis Austrini (Fomalhaut B): Constraints from Astrometry, Radial Velocities, and Direct Imaging

Cited by in corpus (81)

• exoplanet: Gradient-based probabilistic inference for exoplanet data & other astronomical time series
• Images of Embedded Jovian Planet Formation At A Wide Separation Around AB Aurigae
• Constraining the Nature of the PDS 70 Protoplanets with VLTI/GRAVITY
• Direct confirmation of the radial-velocity planet $\beta$ Pic c
• orvara: An Efficient Code to Fit Orbits using Radial Velocity, Absolute, and/or Relative Astrometry
• The mass of Beta Pictoris c from Beta Pictoris b orbital motion
• Keck/NIRC2 $L$'-Band Imaging of Jovian-Mass Accreting Protoplanets around PDS 70
• Understanding the Impacts of Stellar Companions on Planet Formation and Evolution: A Survey of Stellar and Planetary Companions within 25 pc
• Direct discovery of the inner exoplanet in the HD206893 system. Evidence for deuterium burning in a planetary-mass companion
• Obliquity Constraints on an Extrasolar Planetary-Mass Companion
• Rotation Periods, Inclinations, and Obliquities of Cool Stars Hosting Directly Imaged Substellar Companions: Spin-Orbit Misalignments are Common
• Deep exploration of the planets HR 8799 b, c, and d with moderate resolution spectroscopy
• Orbital and mass constraints of the young binary system IRAS 16293-2422 A
• Detecting exomoons from radial velocity measurements of self-luminous planets: application to observations of HR 7672 B and future prospects
• A wide-orbit giant planet in the high-mass b Centauri binary system
• Insights into the planetary dynamics of HD 206893 with ALMA
• Stellar Companions to TESS Objects of Interest: A Test of Planet-Companion Alignment
• Peering into the Young Planetary System AB Pic. Atmosphere, Orbit, Obliquity & Second Planetary Candidate
• A Possible Alignment Between the Orbits of Planetary Systems and their Visual Binary Companions
• Dynamical Mass of the Young Substellar Companion HD 984 B
• Speckle Interferometry at SOAR in 2021
• Constraining the Orbit and Mass of epsilon Eridani b with Radial Velocities, Hipparcos IAD-Gaia DR2 Astrometry, and Multi-epoch Vortex Coronagraphy Upper Limits
• The Impact of Bayesian Hyperpriors on the Population-Level Eccentricity Distribution of Imaged Planets
• WIde Separation Planets In Time (WISPIT): A Gap-clearing Planet in a Multi-ringed Disk around the Young Solar-type Star WISPIT 2
• Characterizing the protolunar disk of the accreting companion GQ Lupi B
• The Orbital Eccentricities of Directly Imaged Companions Using Observable-Based Priors: Implications for Population-level Distributions
• First Light for GRAVITY Wide: Large Separation Fringe Tracking for the Very Large Telescope Interferometer
• First detection of orbital motion for HD 106906 b: A wide-separation exoplanet on a Planet Nine-like orbit
• A Mini-Neptune from TESS and CHEOPS Around the 120 Myr Old AB Dor member HIP 94235
• Revised orbits of the two nearest Jupiters
• GRAVITY K-band spectroscopy of HD 206893 B: brown dwarf or exoplanet
• The Architecture of the V892 Tau System: the Binary and its Circumbinary Disk
• A scaled-up planetary system around a supernova progenitor
• Dynamical Mass of the Exoplanet Host Star HR 8799
• Octofitter: Fast, Flexible, and Accurate Orbit Modelling to Detect Exoplanets
• The eclipse of the V773 Tau B circumbinary disk
• JWST-TST High Contrast: Living on the Wedge, or, NIRCam Bar Coronagraphy Reveals CO${}_2$ in the HR 8799 and 51 Eri Exoplanets' Atmospheres
• The SPHERE view of three interacting twin disc systems in polarised light
• Biases in orbit fitting of directly-imaged exoplanets with small orbital coverage
• Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): A close low mass companion to ET Cha
• Deep orbital search for additional planets in the HR 8799 system
• alpha-Deep Probabilistic Inference (alpha-DPI): efficient uncertainty quantification from exoplanet astrometry to black hole feature extraction
• Rotation and Abundances of the Benchmark Brown Dwarf HD 33632 Ab from Keck/KPIC High-resolution Spectroscopy
• JWST-TST High Contrast: JWST/NIRCam observations of the young giant planet $\beta$ Pic b
• Leaning Sideways: VHS 1256-1257 b is a Super-Jupiter with a Uranus-like Obliquity
• VLTI/GRAVITY Observations and Characterization of the Brown Dwarf Companion HD 72946 B
• Dynamical detection of a companion driving a spiral arm in a protoplanetary disk
• Orbital dynamics in the GG Tau A system: investigating its enigmatic disc
• SCExAO and Keck Direct Imaging Discovery of a Low-Mass Companion Around the Accelerating F5 Star HIP 5319
• Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Diverse outcomes of binary-disk interactions
• Dynamical Mass Estimates of the $\beta$ Pictoris Planetary System Through Gaussian Process Stellar Activity Modelling
• Direct Imaging Discovery of a Young Brown Dwarf Companion to an A2V Star
• The Possible Astrometric Signature of a Planetary-mass Companion to the Nearby Young Star TW Piscis Austrini (Fomalhaut B): Constraints from Astrometry, Radial Velocities, and Direct Imaging
• A catalogue of dual-field interferometric binary calibrators
• Differentiating Formation Models with New Dynamical Masses for the PDS 70 Protoplanets
• Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of $\alpha$ Cen A. I. Observations, Orbital and Physical Properties, and Exozodi Upper Limits
• Imaging of exocomets with infrared interferometry
• Boyajian's Star B: The co-moving stellar companion to KIC 8462852
• Exomoon search with VLTI/GRAVITY around the substellar companion HD 206893 B
• BEAST detection of a brown dwarf and a low-mass stellar companion around the young bright B star HIP 81208
• Efficiently combining Alpha CenA multi-epoch high-contrast imaging data. Application of K-Stacker to the 80 hrs NEAR campaign
• Integral field spectroscopy with the solar gravitational lens
• The Roman coronagraph community participation program: observation planning
• Planet Hunters TESS V: a planetary system around a binary star, including a mini-Neptune in the habitable zone
• Orbital Modeling of HII 1348B: An Eccentric Young Substellar Companion in the Pleiades
• Gl 725A b: a potential super-Earth detected with SOPHIE and SPIRou in an M dwarf binary system at 3.5 pc
• PACOME: Optimal multi-epoch combination of direct imaging observations for joint exoplanet detection and orbit estimation
• N-body Interactions will be Detectable in the HR-8799 System within 5 years with VLTI-GRAVITY
• A second planetesimal collision in the Fomalhaut system
• The mid-infrared spectrum of $\beta$ Pictoris b. First VLTI/MATISSE interferometric observations of an exoplanet
• An Imaging Search for Post-Main-Sequence Planets of Sirius B
• Ultraviolet spectroscopy reveals a hot and luminous companion to the Be star+black hole candidate MWC 656
• True Masses using RV data with Hipparcos and Gaia Astrometry
• Few Observation Binary Orbit Solver (FOBOS) from two (or more) astrometric observations
• Direct Imaging Discovery of Giant Exoplanet $\beta$ Pictoris d: A Decade-Long Game of Hide-and-Seek
• Obliquity Constraints on the Planetary-mass Companion HD 106906 b
• The $\beta$ Pictoris b Hill sphere transit campaign. Paper II: Searching for the signatures of the $\beta$ Pictoris exoplanets through time delay analysis of the $\delta$ Scuti pulsations
• A planetary-mass candidate imaged in the Young Suns Exoplanet Survey
• CD-27 11535: Evidence for a Triple System in the $\beta$ Pictoris Moving Group
• An Eccentric Massive Protobinary Assembled via a Core-merger Parabolic Encounter
• Interferometric Detection and Orbit Modeling of the Subcomponent in the Hot-dust System $\kappa$ Tuc A: A Low-mass Star on an Eccentric Orbit in a Hierarchical-quintuple System