Refractory and Volatile Species in the UV-to-IR Transmission Spectrum of Ultra-hot Jupiter WASP-178b with HST and JWST

Abstract

The atmospheres of ultra-hot Jupiters are unique compared to other planets because of the presence of both refractory and volatile gaseous species, enabling a new lens to constrain a planet's composition, chemistry, and formation. WASP-178b is one such ultra-hot Jupiter that was recently found to exhibit enormous NUV absorption between 0.2 and 0.4 $\mu$m from some combination of Fe+, Mg, and SiO. Here, we present new infrared observations of WASP-178b with HST/WFC3 and JWST/NIRSpec/G395H, providing novel measurements of the volatile species H${}_2$O and CO in WASP-178b's atmosphere. Atmospheric retrievals find a range of compositional interpretations depending on which dataset is retrieved, the type of chemistry assumed, and the temperature structure parametrization used due to the combined effects of thermal dissociation, the lack of volatile spectral features besides H${}_2$O and CO, and the relative weakness of H${}_2$O and CO themselves. Taken together with a new state-of-the-art characterization of the host star, our retrieval analyses suggests a solar to super-solar [O/H] and [Si/H], but sub-solar [C/H], perhaps suggesting rock-laden atmospheric enrichment near the H${}_2$O iceline. To obtain meaningful abundance constraints for this planet, it was essential to combine the JWST IR data with short-wavelength HST observations, highlighting the ongoing synergy between the two facilities.

arXiv comment34 pages, 16 figures, Accepted to AJ

References in corpus (130)

• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• Galactic Stellar and Substellar Initial Mass Function
• Gaia Data Release 2. Summary of the contents and survey properties
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Gaia mission
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Modules for Experiments in Stellar Astrophysics (MESA)
• Gaia Data Release 3: Summary of the content and survey properties
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• A grid of MARCS model atmospheres for late-type stars I. Methods and general properties
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• The SIMBAD astronomical database
• Analytic Lightcurves for Planetary Transit Searches
• Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
• Multimodal nested sampling: an efficient and robust alternative to MCMC methods for astronomical data analysis
• X-ray spectral modelling of the AGN obscuring region in the CDFS: Bayesian model selection and catalogue
• The VizieR database of Astronomical Catalogues
• Shrinking binary and planetary orbits by Kozai cycles with tidal friction
• Bayes in the sky: Bayesian inference and model selection in cosmology
• Gaia Early Data Release 3: The astrometric solution
• The NextGen Model Atmosphere grid for $3000\le \Teff \le 10000\K$
• The effects of snowlines on C/O in planetary atmospheres
• Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position
• Importance Nested Sampling and the MultiNest Algorithm
• Clouds in the atmosphere of the super-Earth exoplanet GJ 1214b
• Preliminary Results from NEOWISE: An Enhancement to the Wide-field Infrared Survey Explorer for Solar System Science
• New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey
• Gaia Data Release 2: Photometric content and validation
• ASPCAP: The Apogee Stellar Parameter and Chemical Abundances Pipeline
• A high accuracy computed water line list
• ExoMol molecular line lists XXX: a complete high-accuracy line list for water
• Gaia Data Release 2: Catalogue validation
• Modules for Experiments in Stellar Astrophysics (MESA): Time-Dependent Convection, Energy Conservation, Automatic Differentiation, and Infrastructure
• petitRADTRANS: a Python radiative transfer package for exoplanet characterization and retrieval
• On the radiative equilibrium of irradiated planetary atmospheres
• Infrared Transmission Spectroscopy of the Exoplanets HD209458b and XO-1b Using the Wide Field Camera-3 on the Hubble Space Telescope
• APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South
• The Data Reduction Pipeline for the Apache Point Observatory Galactic Evolution Experiment
• Secular Chaos and the Production of Hot Jupiters
• ExoMol line lists IV: The rotation-vibration spectrum of methane up to 1500 K
• A Spectroscopic Study of the Ancient Milky Way: F- and G-Type Stars in the Third Data Release of the Sloan Digital Sky Survey
• Gaia Early Data Release 3 -- Catalogue validation
• Abundances, Stellar Parameters, and Spectra From the SDSS-III/APOGEE Survey
• Target Selection for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The imprint of exoplanet formation history on observable present-day spectra of hot Jupiters
• 3D mixing in hot Jupiter atmospheres. I. application to the day/night cold trap in HD 209458b
• A variationally computed line list for hot NH3
• The Flat Transmission Spectrum of the Super-Earth GJ1214b from Wide Field Camera 3 on the Hubble Space Telescope
• Juliet: a versatile modelling tool for transiting and non-transiting exoplanetary systems
• From thermal dissociation to condensation in the atmospheres of ultra hot Jupiters: WASP-121b in context
• PandExo: A Community Tool for Transiting Exoplanet Science with JWST & HST
• Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM
• ExoMol line lists III: An improved hot rotation-vibration line list for HCN and HNC
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE) Spectrographs
• The CatWISE2020 Catalog
• Target Selection for the SDSS-IV APOGEE-2 Survey
• ExoMol Molecular linelists -- XXXIII. The spectrum of Titanium Oxide
• Early Release Science of the Exoplanet WASP-39b with JWST NIRSpec G395H
• A giant planet undergoing extreme ultraviolet irradiation by its hot massive-star host
• Atmospheric Chemistry in Giant Planets, Brown Dwarfs, and Low-Mass Dwarf Stars III. Iron, Magnesium, and Silicon
• Extremely Irradiated Hot Jupiters: Non-Oxide Inversions, H- Opacity, and Thermal Dissociation of Molecules
• Atomic iron and titanium in the atmosphere of the exoplanet KELT-9b
• Aerosol Composition of Hot Giant Exoplanets Dominated by Silicates and Hydrocarbon Hazes
• A spectral survey of an ultra-hot Jupiter: Detection of metals in the transmission spectrum of KELT-9 b
• ExoMol line lists XVIII. The high temperature spectrum of VO
• ExoMol line lists -- XXXIX. Ro-vibrational molecular line list for CO${}_2$
• WASP-121 b: a hot Jupiter in a polar orbit and close to tidal disruption
• ExoMol molecular line lists - XIV: The rotation-vibration spectrum of hot SO${}_2$
• Updated Gaia-2MASS 3D maps of Galactic interstellar dust
• Tracing the formation history of giant planets in protoplanetary disks with Carbon, Oxygen, Nitrogen and Sulphur
• The HST PanCET Program: Exospheric Mg II and Fe II in the Near-UV transmission spectrum of WASP-121b using Jitter Decorrelation
• The Gaia-ESO Public Spectroscopic Survey: Implementation, data products, open cluster survey, science, and legacy
• Accuracy tests of radiation schemes used in hot Jupiter global circulation models
• ExoMol line lists VII: The rotation-vibration spectrum of phosphine up to 1500 K
• The SDSS-III APOGEE Spectral Line List for H-band Spectroscopy
• The Effects of Consistent Chemical Kinetics Calculations on the Pressure-Temperature Profiles and Emission Spectra of Hot Jupiters
• An optical transmission spectrum for the ultra-hot Jupiter WASP-121b measured with the Hubble Space Telescope
• Irradiated Planets
• The APOGEE Data Release 16 Spectral Line List
• Gaia Data Release 2: processing of the photometric data
• Information Content of Exoplanetary Transit Spectra: An Initial Look
• Eureka!: An End-to-End Pipeline for JWST Time-Series Observations
• Advection of potential temperature in the atmosphere of irradiated exoplanets: a robust mechanism to explain radius inflation
• Chemical Abundances in Field Red Giants from High-Resolution H-Band Spectra using the APOGEE Spectral Linelist
• The Peculiar Atmospheric Chemistry of KELT-9b
• The Gaia-ESO Public Spectroscopic Survey: Motivation, implementation, GIRAFFE data processing, analysis, and final data products
• The CatWISE Preliminary Catalog: Motions from $WISE$ and $NEOWISE$ Data
• Three-dimensional extinction maps: Inverting inter-calibrated extinction catalogues
• A library of ATMO forward model transmission spectra for hot Jupiter exoplanets
• A New Window into Planet Formation and Migration: Refractory-to-Volatile Elemental Ratios in Ultra-hot Jupiters
• CRIRES spectroscopy and empirical line-by-line identification of FeH molecular absorption in an M dwarf
• Final Targeting Strategy for the SDSS-IV APOGEE-2N Survey
• A warm Neptune's methane reveals core mass and vigorous atmospheric mixing
• How drifting and evaporating pebbles shape giant planets II: Volatiles and refractories in atmospheres
• Vanadium oxide and a sharp onset of cold-trapping on a giant exoplanet
• Chemical Diversity in Protoplanetary Disks and Its Impact on the Formation History of Giant Planets
• Strong biases in retrieved atmospheric composition caused by strong day-night chemical heterogeneities
• Relative abundance constraints from high-resolution optical transmission spectroscopy of WASP-121b, and a fast model-filtering technique for accelerating retrievals
• Gaia Early Data Release 3. Building the Gaia DR3 source list -- Cross-match of Gaia observations
• Evidence for H${}_2$ Dissociation and Recombination Heat Transport in the Atmosphere of KELT-9b
• Sodium and Oxygen Abundances in the Open Cluster NGC 6791 from APOGEE H-Band Spectroscopy
• Breaking Degeneracies in Formation Histories by Measuring Refractory Content in Gas Giants
• The Influence of Host Star Spectral Type on Ultra-Hot Jupiter Atmospheres
• Retrieval survey of metals in six ultra-hot Jupiters: Trends in chemistry, rain-out, ionisation and atmospheric dynamics
• ExoMol line lists -- XLIV. IR and UV line list for silicon monoxide (SiO)
• A transition between the hot and the ultra-hot Jupiter atmospheres
• Evidence for Atmospheric Cold-trap Processes in the Noninverted Emission Spectrum of Kepler-13Ab Using HST/WFC3
• Nightside Pollution of Exoplanet Transit Depths
• Gaia Early Data Release 3: Modelling and calibration of Gaia's point and line spread functions
• Near-infrared narrow-band photometry of M-giant and Mira stars: models meet observations
• Atmospheric retrievals with petitRADTRANS
• Hints of a sulfur-rich atmosphere around the 1.6 R${}_{\oplus }$ Super-Earth L98-59 d from JWST NIRSpec G395H transmission spectroscopy
• A Hubble Space Telescope Search for a Sub-Earth-Sized Exoplanet in the GJ 436 System
• Evidence that the Hot Jupiter WASP-77 A b Formed Beyond Its Parent Protoplanetary Disk's H2O Ice Line
• A JWST NIRSpec Phase Curve for WASP-121b: Dayside Emission Strongest Eastward of the Substellar Point and Nightside Conditions Conducive to Cloud Formation
• ExoMol molecular line lists - XXVI: spectra of SH and NS
• CRIRES+ and ESPRESSO reveal an atmosphere enriched in volatiles relative to refractories on the ultra-hot Jupiter WASP-121b
• The TESS-Keck Survey: Science Goals and Target Selection
• KELT-25b and KELT-26b: A Hot Jupiter and a Substellar Companion Transiting Young A-stars Observed by TESS
• Towards multi-dimensional analysis of transmission spectroscopy. Part II: Day-night induced biases in retrievals from hot to ultra-hot Jupiters
• WASP-South hot Jupiters: WASP-178b, WASP-184b, WASP-185b & WASP-192b
• The atmospheric composition of the ultra-hot Jupiter WASP-178 b observed with ESPRESSO

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• The compositions of the HR 8799 planets reflect accretion of both solids and metal-enriched gas
• Strong NUV Refractory Absorption and Dissociated Water in the Hubble Transmission Spectrum of the Ultra Hot Jupiter KELT-20 b
• 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
• NLTE atmospheric modelling of the ultra-hot Jupiter WASP-178b and comparison with UV and optical observations