J/A+A/616/A145ivo://CDS.VizieR/J/A+A/616/A145doi:10.26093/cds/vizier.36160145CDSChen G.Palle E.Welbanks L.Prieto-Arranz J.Madhusudhan N.,Gandhi S.Casasayas-Barris N.Murgas F.Nortmann L.Crouzet N.,Parviainen H.Gandolfi D.2018-09-28T07:48:09Z2018-08-29T07:00:31ZCDS support team

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

cds-question@unistra.frmultiple-starssolar-system-planetsspectroscopyExoplanets with relatively clear atmospheres are prime targets for detailed studies of chemical compositions and abundances in their atmospheres. Alkali metals have been long suggested to exhibit broad wings due to pressure broadening, but most of the alkali detections only show very narrow absorption cores, probably due to the presence of clouds. Here we report the strong detection of the pressure-broadened spectral profiles of Na, K, and Li absorption in the atmosphere of the super-Neptune WASP-127b, at 5.0{sigma}, 4.1{sigma}, and 3.4{sigma}, respectively. We performed a spectral retrieval modeling on the high-quality optical transmission spectrum newly acquired with the 10.4m Gran Telescopio Canarias (GTC), in combination with the re-analyzed optical transmission spectrum obtained with the 2.5m Nordic Optical Telescope (NOT). By assuming a patchy cloudy model, we retrieved the abundances of Na, K, and Li, which are super-solar at 3.7{sigma} for K and 5.1{sigma} for Li (and only 1.8{sigma} for Na). We constrained the presence of haze coverage to be around 52%. We also found a hint of water absorption, but cannot constrain it with the global retrieval due to larger uncertainties in the probed wavelengths. WASP-127b will be extremely valuable for atmospheric characterization in the era of James Webb space telescope.2018A&A...616A.145Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/616/A145CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/563/A41 : WASP-43 OSIRIS transmission spectroscopy (Murgas+, 2014)J/A+A/589/A62 : GTC transit light curves of CoRoT-29b (Palle+, 2016)J/A+A/594/A65 : GTC transit light curves of HAT-P-32b (Nortmann+, 2016)J/A+A/600/L11 : GTC transit light curves of WASP-52b (Chen+, 2017)J/A+A/605/A114 : GTC transit light curves of WASP-48b (Murgas+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/616/A145https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/616/A145http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/616/A145https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/616/A145https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/616/A145http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/616/A145GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/616/A145/listlcList of ligth curves for chanels 01 to 86recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlcShow the light curvesmeta.ref.urlcharFileNameName of the file in subdirectory lcmeta.id;meta.filecharRangeWavelength rangenmem.wlcharObs.dateObservation date (2018/01/19)time.epoch;obscharJ/A+A/616/A145/gtc-specOut-of-transit average spectra of WASP-127 and its reference star, shown in Figure 1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLambdaCommon wavelength gridnmem.wldoubleFlux-sciSpectrum of WASP-127 interpolated on common wavelength grid, shown in Figure 1 (in ADU units)phot.fluxdoubleFlux-refSpectrum of the reference star interpolated on common wavelength grid, shown in Figure 1 (in ADU units)meta.ref;phot.fluxdoubleJ/A+A/616/A145/gtc-wlcWASP-127 GTC transit white light curve (2018/01/19)FluxRelative fluxphot.flux;arith.ratiodoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date (TDB standard)dtime.epochdoublee_FluxUncertainty of relative fluxstat.error;phot.fluxdoubleposXDrift of star on CCD in spatial directionpixpos.cartesian.x;instr.detdoubleposYDrift of star on CCD in dispersion directionpixpos.cartesian.y;instr.detdoublefwhmXRelative change of full width at half maximum of the stellar absorption line profilepixarith.rate;spect.line.widthdoublefwhmYFull width at half maximum of the stellar spatial profilepixspect.line.widthdoubleAirmAirmass during observationobs.airMassdoubleRotAngRotator angle during observationdeginstr.offsetdouble