Early Release Science of the exoplanet WASP-39b with JWST NIRISS
arXiv:2211.10493 · doi:10.1038/s41586-022-05674-1
Abstract
Transmission spectroscopy provides insight into the atmospheric properties and consequently the formation history, physics, and chemistry of transiting exoplanets. However, obtaining precise inferences of atmospheric properties from transmission spectra requires simultaneously measuring the strength and shape of multiple spectral absorption features from a wide range of chemical species. This has been challenging given the precision and wavelength coverage of previous observatories. Here, we present the transmission spectrum of the Saturn-mass exoplanet WASP-39b obtained using the SOSS mode of the NIRISS instrument on the JWST. This spectrum spans m in wavelength and reveals multiple water absorption bands, the potassium resonance doublet, as well as signatures of clouds. The precision and broad wavelength coverage of NIRISS-SOSS allows us to break model degeneracies between cloud properties and the atmospheric composition of WASP-39b, favoring a heavy element enhancement ("metallicity") of the solar value, a sub-solar carbon-to-oxygen (C/O) ratio, and a solar-to-super-solar potassium-to-oxygen (K/O) ratio. The observations are best explained by wavelength-dependent, non-gray clouds with inhomogeneous coverage of the planet's terminator.
48 pages, 12 figures, 2 tables. Under review at Nature
References in corpus (45)
- Atmospheric Retrieval for Super-Earths: Uniquely Constraining the Atmospheric Composition with Transmission Spectroscopy
- A Precise Water Abundance Measurement for the Hot Jupiter WASP-43b
- Rayleigh scattering in the transit spectrum of HD 189733b
- The imprint of exoplanet formation history on observable present-day spectra of hot Jupiters
- Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM
- Towards Chemical Constraints on Hot Jupiter Migration
- Early Release Science of the Exoplanet WASP-39b with JWST NIRSpec G395H
- Limb darkening and exoplanets: testing stellar model atmospheres and identifying biases in transit parameters
- Fingering convection and cloudless models for cool brown dwarf atmospheres
- A Sub-Neptune Exoplanet with a Low-Metallicity Methane-Depleted Atmosphere and Mie-Scattering Clouds
- ExoMol molecular line lists - XVI: The rotation-vibration spectrum of hot HS
- Mass-Metallicity Trends in Transiting Exoplanets from Atmospheric Abundances of HO, Na, and K
- Early Release Science of the exoplanet WASP-39b with JWST NIRCam
- Identification of carbon dioxide in an exoplanet atmosphere
- Exoplanet Reflected Light Spectroscopy with PICASO
- Setting the volatile composition of (exo)planet-building material. Does chemical evolution in disk midplanes matter?
- The Complete transmission spectrum of WASP-39b with a precise water constraint
- A hybrid line list for CH and hot methane continuum
- The Effects of Consistent Chemical Kinetics Calculations on the Pressure-Temperature Profiles and Emission Spectra of Hot Jupiters
- HELIOS-K 2.0 Opacity Calculator and Open-source Opacity Database for Exoplanetary Atmospheres
- Eureka!: An End-to-End Pipeline for JWST Time-Series Observations
- PICASO 3.0: A One-Dimensional Climate Model for Giant Planets and Brown Dwarfs
- VLT FORS2 comparative transmission spectroscopy: Detection of Na in the atmosphere of WASP-39b from the ground
- Transit Signatures of Inhomogeneous Clouds on Hot Jupiters: Insights From Microphysical Cloud Modeling
- Atmospheric Regimes and Trends on Exoplanets and Brown Dwarfs
- On degeneracies in retrievals of exoplanetary transmission spectra
- The ARCiS framework for Exoplanet Atmospheres: Modelling Philosophy and Retrieval
- Five key exoplanet questions answered via the analysis of 25 hot Jupiter atmospheres in eclipse
- How drifting and evaporating pebbles shape giant planets II: Volatiles and refractories in atmospheres
- A unique hot Jupiter spectral sequence with evidence for compositional diversity
- The origin of the high metallicity of close-in giant exoplanets: Combined effect of the resonant and aerodynamic shepherding
- Analysis of a JWST NIRSpec Lab Time Series: Characterizing Systematics, Recovering Exoplanet Transit Spectroscopy, and Constraining a Noise Floor
- Aurora: A Generalised Retrieval Framework for Exoplanetary Transmission Spectra
- Super-Rayleigh Slopes in Transmission Spectra of Exoplanets Generated by Photochemical Haze
- EXOPLINES: Molecular Absorption Cross-Section Database for Brown Dwarf and Giant Exoplanet Atmospheres
- A Library of Self-Consistent Simulated Exoplanet Atmospheres
- The GAPS Programme with HARPS-N at TNG. XXXV. Fundamental properties of transiting exoplanet host stars
- The Influence of Stellar Contamination on the Interpretation of Near Infrared Transmission Spectra of Sub-Neptune Worlds around M-Dwarfs
- A New Sedimentation Model for Greater Cloud Diversity in Giant Exoplanets and Brown Dwarfs
- Proxima Centauri as a Benchmark for Stellar Activity Indicators in the Near Infrared
- APPLESOSS: A Producer of ProfiLEs for SOSS. Application to the NIRISS SOSS Mode
- ATOCA: an algorithm to treat order contamination. Application to the NIRISS SOSS mode
- The PHOENIX Exoplanet Retrieval Algorithm and Using H Opacity as a Probe in Ultra-hot Jupiters
- ExoTiC-ISM: A Python package for marginalised exoplanet transit parameters across a grid of systematic instrument models
- Super stellar abundances of alkali metals suggest significant migration for Hot Jupiters
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- Early Release Science of the exoplanet WASP-39b with JWST NIRCam
- Atmospheric Reconnaissance of TRAPPIST-1 b with JWST/NIRISS: Evidence for Strong Stellar Contamination in the Transmission Spectra
- A broadband thermal emission spectrum of the ultra-hot Jupiter WASP-18b
- The Sonora Substellar Atmosphere Models. IV. Elf Owl: Atmospheric Mixing and Chemical Disequilibrium with Varying Metallicity and C/O Ratios
- Sulphur dioxide in the mid-infrared transmission spectrum of WASP-39b
- JWST/NIRISS reveals the water-rich "steam world" atmosphere of GJ 9827 d
- Awesome SOSS: Transmission Spectroscopy of WASP-96b with NIRISS/SOSS
- Near-Infrared Transmission Spectroscopy of HAT-P-18b with NIRISS: Disentangling Planetary and Stellar Features in the Era of JWST
- A Benchmark JWST Near-Infrared Spectrum for the Exoplanet WASP-39b
- Clouds and Clarity: Revisiting Atmospheric Feature Trends in Neptune-size Exoplanets
- JWST transmission spectroscopy of HD 209458b: a super-solar metallicity, a very low C/O, and no evidence of CH4, HCN, or C2H2
- Awesome SOSS: Atmospheric Characterisation of WASP-96 b using the JWST Early Release Observations
- High atmospheric metal enrichment for a Saturn-mass planet
- The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope -- III. Single Object Slitless Spectroscopy
- Volatile-to-sulfur Ratios Can Recover a Gas Giant's Accretion History
- Atmospheric retrievals with petitRADTRANS
- Hints of a sulfur-rich atmosphere around the 1.6 R Super-Earth L98-59 d from JWST NIRSpec G395H transmission spectroscopy
- Homogeneous search for helium in the atmosphere of 11 gas giant exoplanets with SPIRou
- Exoplanet Spectroscopy with JWST NIRISS: Diagnostics and Case Studies
- Escaping Helium and a Highly Muted Spectrum Suggest a Metal-Enriched Atmosphere on Sub-Neptune GJ3090b from JWST Transit Spectroscopy
- Toward Robust Corrections for Stellar Contamination in JWST Exoplanet Transmission Spectra
- BOWIE-ALIGN: How formation and migration histories of giant planets impact atmospheric compositions
- A Mini-Chemical Scheme with Net Reactions for 3D GCMs II. 3D thermochemical modelling of WASP-39b and HD 189733b
- Multiple Clues for Dayside Aerosols and Temperature Gradients in WASP-69 b from a Panchromatic JWST Emission Spectrum
- Chemical mapping of temperate sub-Neptune atmospheres: Constraining the deep-interior H2O/H2 using the atmospheric CO2/CH4
- BOWIE-ALIGN: JWST reveals hints of planetesimal accretion and complex sulphur chemistry in the atmosphere of the misaligned hot Jupiter WASP-15b
- Detection of carbon monoxide's 4.6 micron fundamental band structure in WASP-39b's atmosphere with JWST NIRSpec G395H
- Insufficient evidence for DMS and DMDS in the atmosphere of K2-18 b. From a joint analysis of JWST NIRISS, NIRSpec, and MIRI observations
- JWST-TST DREAMS: A Precise Water Abundance for Hot Jupiter WASP-17b from the NIRISS SOSS Transmission Spectrum
- Challenges in the detection of gases in exoplanet atmospheres
- Planet Mass and Metallicity: The Exoplanets and Solar System Connection
- Large Interferometer For Exoplanets (LIFE): IX. Assessing the Impact of Clouds on Atmospheric Retrievals at Mid-Infrared Wavelengths with a Venus-Twin Exoplanet
- Dynamics and Clouds in Planetary Atmospheres from Telescopic Observations
- Modelling dynamically driven global cloud formation microphysics in the HAT-P-1b atmosphere
- Transmission spectroscopy of WASP-52 b with JWST NIRISS: Water and helium atmospheric absorption, alongside prominent star-spot crossings
- Measuring Tracers of Planet Formation in the Atmosphere of WASP-77A b: Sub-stellar O/H and C/H ratios, with a stellar C/O ratio and a potentially Super-stellar Ti/H ratio
- Day-night transport induced chemistry and clouds on WASP-39b I: Gas-phase composition
- Prebiosignature Molecules Can Be Detected in Temperate Exoplanet Atmospheres with JWST
- Featureless transmission spectra of 12 giant exoplanets observed by GTC/OSIRIS
- A Direct Comparison between the use of Double Gray and Multiwavelength Radiative Transfer in a General Circulation Model with and without Radiatively Active Clouds
- BOWIE-ALIGN: A JWST comparative survey of aligned vs misaligned hot Jupiters to test the dependence of atmospheric composition on migration history
- Reflected spectroscopy of small exoplanets III: probing the UV band to measure biosignature gasses
- Tracing the formation and migration history: molecular signatures in the atmosphere of misaligned hot Jupiter WASP-94Ab using JWST NIRSpec/G395H
- Why heterogeneous cloud particles matter: Iron-bearing species and cloud particle morphology affects exoplanet transmission spectra
- A Panchromatic Characterization of the Evening and Morning Atmosphere of WASP-107 b: Composition and Cloud Variations, and Insight into the Effect of Stellar Contamination
- Automated chemical reaction network generation and its application to exoplanet atmospheres
- Cloud and Haze Parameterization in Atmospheric Retrievals: Insights from Titan's Cassini Data and JWST Observations of Hot Jupiters
- Constraining the formation of WASP-39b using JWST transit spectroscopy
- Detecting Planetary Oblateness in the Era of JWST: A Case Study of Kepler-167e
- A physically derived eddy parameterization for giant planet atmospheres with application on hot-Jupiter atmospheres
- LRG-BEASTS: Evidence for clouds in the transmission spectrum of HATS-46 b
- Breaking degeneracies in exoplanetary parameters through self-consistent atmosphere-interior modelling
- Enabling Robust Exoplanet Atmospheric Retrievals with Gaussian Processes
- Diversity in the haziness and chemistry of temperate sub-Neptunes
- A Population Analysis of 20 Exoplanets Observed from the Optical to the Near-infrared Wavelengths with HST: Evidence for Widespread Stellar Contamination
- Comparing transit spectroscopy pipelines at the catalogue level: evidence for systematic differences
- ARES VI: Viability of one-dimensional retrieval models for transmission spectroscopy characterization of exo-atmospheres in the era of JWST and Ariel
- An extremely low-density exoplanet spins slow
- Possible Evidence for the Presence of Volatiles on the Warm Super-Earth TOI-270 b
- Vanadium oxide clusters in substellar atmospheres: A quantum chemical study
- A Biotic Habitable Zone: Impacts of Adaptation in Biotic Temperature Regulation
- An extended low-density atmosphere around the Jupiter-sized planet WASP-193 b
- Under the magnifying glass: A combined 3D model applied to cloudy warm Saturn type exoplanets around M-dwarfs
- Probing reflection from aerosols with the near-infrared dayside spectrum of WASP-80b
- Evidence of Titanate Clouds in the Day-side Atmosphere of the Ultra-Hot Jupiter WASP-121b
- The effect of spectroscopic binning on atmospheric retrievals
- An Analytic Characterization of the Limb Asymmetry -- Transit Time Degeneracy
- The role of cloud particle properties on WASP-39b transmission spectrum based on JWST/NIRSpec observations
- Using a neural network approach to accelerate disequilibrium chemistry calculations in exoplanet atmospheres
- Lessons from Hubble and Spitzer: 1D Self-Consistent Model Grids for 19 Hot Jupiter Emission Spectra
- Reflected-light Phase Curves with PICASO: A Kepler-7b Case Study
- A Comprehensive Analysis of the Panchromatic Transmission Spectrum of the Hot-Saturn WASP-96 b: Nondetection of Haze, Possible Sodium Limb Asymmetry, Stellar Characterization, and Formation History
- Migration and Evolution of giant ExoPlanets (MEEP) II: Super-Jupiters and Lithium-rich Host Stars
- A Moderate Albedo from Reflecting Aerosols on the Dayside of WASP-80 b Revealed by JWST/NIRISS Eclipse Spectroscopy
- Evidence for a Nonzero Eccentricity Superpuff Exoplanet WASP-107 b Using JWST Occultation Observation
- Detection of Na in the atmosphere of the hot Jupiter HAT-P-55b
- Ground-Based Reconnaissance Observations of 21 Exoplanet Atmospheres with the Exoplanet Transmission Spectroscopy Imager
- Limb-Darkening Coefficients for the 4-Term and Power-2 Laws for the JWST Space Mission, Adopting PHOENIX Spherical Models at High Resolution
- Warm Jupiters around M-dwarfs are great opportunities for extensive chemical, cloud and haze characterisation with JWST
- Knobs and dials of retrieving JWST transmission spectra. II. Impacts of pipeline-level differences on retrieval posteriors
- Separating flare and secondary atmospheric signals with RADYN modeling of near-infrared JWST transmission spectroscopy observations of TRAPPIST-1
- Examining the detectability of ringing on highly eccentric exoplanets
- KRONOS I: The m JWST Transmission Spectrum of the 23 Myr V1298 Tau c
- An Informational-Entropic Approach to Exoplanet Characterization
- Exploring Synergies between Twinkle and Ariel: a Pilot Study
- A Panchromatic JWST Spectrum of a Giant Starspot on the Fully Convective M-dwarf TOI-3884
- A new look into the atmospheric composition of WASP-39 b
- Methane on the temperate exo-Saturn TOI-199b
- Twinkle Twinkle Little Star, Roman Sees Where You Are: Predicting Exoplanet Transit Yields in the Rosette Nebula with the Nancy Grace Roman Space Telescope
- JWST unveils a high mean molecular weight atmosphere for mini-Neptune TOI-1130b: Evidence for formation beyond the water ice line
- The effect of JWST/NIRSpec data reduction on the retrieval of WASP-39b atmospheric properties
- Information content of JWST transmission spectroscopy of the exoplanet HAT-P-12b from the optical to the mid-infrared
- The HUSTLE Program: The UV to Near-IR Transmission Spectrum of the Hot Jupiter KELT-7b
- Heavy element enrichment of gas in surface-accretion disks: A possible origin of the mass-metallicity anti-correlation in exoplanets
- Precise Constraints on the Energy Budget of WASP-121 b from its JWST NIRISS/SOSS Phase Curve