J/AJ/169/38ivo://CDS.VizieR/J/AJ/169/38doi:10.26093/cds/vizier/be-59-16CDSZhang M.Paragas K.Bean J.L.Yeung J.Chachan Y.Greene T.P.,Lunine J.Deming D.2026-07-02T11:52:17Z2025-11-12T15:07:10ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frexoplanetsinfrared-astronomyspectroscopyWe present the 2.4-5.0um JWST/NIRCam emission spectrum of HD 189733b, along with an independent re-reduction of the previously published transmission spectrum at the same wavelengths. We use an upgraded version of PLanetary Atmospheric Tool for Observer Noobs (PLATON) to retrieve atmospheric parameters from both geometries. In transit, we obtain [M/H]=0.53_-0.12_^+0.13^ and C/O=0.41_-0.12_^+0.13^, assuming a power-law haze and equilibrium chemistry with methane depletion. In eclipse, we obtain [M/H]=0.68_-0.11_^+0.15^ and C/O=0.43_-0.05_^+0.06^, assuming a clear atmosphere and equilibrium chemistry without methane depletion. These results are consistent with each other, and with a rerun of our previously published joint retrieval of Hubble Space Telescope and Spitzer transmission and emission spectra. Accounting for methane depletion decreases the C/O ratio by 0.14/0.04 (transmission/emission), but changing the limb cloud parameterization does not affect the C/O ratio by more than 0.06. We detect H_2_O, CO_2_, CO, and H_2_S in both the NIRCam transmission and emission spectra, find that methane is depleted on the terminator, and confirm with VULCAN that photochemistry is a potential cause of this depletion. We also find tentative (1.8{sigma}) evidence of a dayside thermal inversion at millibar pressures. Finally, we take this opportunity to introduce a new version of PLATON. PLATON 6 supports GPU computation, speeding up the code up to 10x. It also supports free retrievals using both volume mixing ratio and centered-log ratio priors; emission from planetary surfaces of different compositions; updated opacities at improved resolution; and Pareto smoothed importance sampling leave-one-out cross-validation.2025AJ....169...38Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/169/38CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/135/68 : HD 189733 differential light curve (Henry+, 2008)J/ApJ/795/166 : Extrasolar planet HD 189733b whitelight curve (Crouzet+, 2014)J/ApJ/791/55 : HD 189733b in transit light curve (McCullough+, 2014)J/A+A/573/A90 : STAGGER-grid of 3D stellar models. IV. (Magic+, 2015)J/A+A/589/A21 : K-H2 line shapes for cool brown dwarfs spectra (Allard+, 2016)J/A+A/619/A96 : HD189733 spectral variability (Kohl+, 2018)J/ApJS/260/3 : 25 hot-Jupiter properties from HST & Spitzer (Changeat+, 2022)J/ApJ/940/L35 : HAT-P-18b JWST NIRISS transmission spectrum (Fu+, 2022)J/MNRAS/510/903 : ExoMol molecular line lists. XLIV. SiO (Yurchenko+, 2022)J/AJ/165/5 : SDSS ugri photometry of HD 189733 (Gardner-Watkins+, 2023)J/AJ/165/104 : Emergent spectral IR fluxes of 122 hot Jupiters (Deming+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/169/38https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/169/38http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/169/38https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/169/38https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/169/38http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/169/38GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/AJ/169/38/fig7Best-fit transmission and emission spectra of HD 189733b (data behind Figure 7)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeSpectrum type (1)meta.notecharMinWave[2.4/4.95] Minimum wavelength of the binumem.wl;stat.min;em.IR.NIRfloatMaxWave[2.45/5] Maximum wavelength of the binumem.wl;stat.max;em.IR.NIRfloatDepth[4.2e-4/2.5e-2] Median depth in wavelength binphot.flux.density;arith.ratio;em.IR.NIRdoublee_Depth[2e-5/5.3e-5] Lower uncertainty in Depthstat.error;phot.flux.density;arith.ratiofloatE_Depth[2e-5/5.1e-5] Upper uncertainty in Depthstat.error;phot.flux.density;arith.ratiofloat