J/A+A/646/A159ivo://CDS.VizieR/J/A+A/646/A159doi:10.26093/cds/vizier.36460159CDSScandariato G.Borsa F.Sicilia D.Malavolta L.Biazzo K.Bonomo A.S.,Bruno G.Claudi R.Covino E.Di Marcantonio P.Esposito M.,Frustagli G.Lanza A.F.Maldonado J.Maggio A.Mancini L.Micela G.,Nardiello D.Rainer M.Singh V.Sozzetti A.Affer L.Benatti S.,Bignamini A.Biliotti V.Capuzzo-Dolcetta R.Carleo I.Cosentino R.,Damasso M.Desidera S.Garcia de Gurtubai A.Ghedina A.Giacobbe P.,Giani E.Harutyunyan A.Hernandez N.Hernandez Diaz M.Knapic C.,Leto G.Fiorenzano A.F.MartinezE.MolinariNascimbeni V.Pagano I.,Pedani M.Piotto G.Poretti E.Stoev H.2021-09-10T13:47:58Z2021-02-19T09:40:29ZCDS support team

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

cds-question@unistra.frg-starsexoplanetsradial-velocityspectroscopyThe analysis of exoplanetary atmospheres by means of high-resolution spectroscopy is an expanding research field which provides information o n chemical composition, thermal structure, atmospheric dynamics and orbital velocity of exoplanets. In this work, we aim at the detection of the light reflected by the exoplanet 51 Peg b employing optical high-resolution spectroscopy. To detect the light reflected by the planetary dayside we use optical HARPS and HARPS-N spectra taken near the superior conjunction of the planet, when the flux contrast between the planet and the star is maximum. To search for the weak planetary signal, we cross-correlate the observed spectra with a high S/N stellar spectrum. We homogeneously analyze the available datasets and derive a 10^-5^ upper limit on the planet-to-star flux contrast in the optical. The upper limit on the planet-to-star flux contrast of 10^-5^ translates into a low albedo of the planetary atmosphere (A_g_~0.05-0.15 for an assumed planetary radius in the range 1.5-0.9R_Jup_, as estimated from the planet's mass).2021A&A...646A.159Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/646/A159CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/414/351 : ELODIE survey for northern extrasolar planets (Naef+, 2004)J/ApJ/646/505 : Catalog of nearby exoplanets (Butler+, 2006)J/ApJS/210/5 : The twenty-five year Lick planet search (Fischer+, 2014)J/A+A/576/A134 : Radial velocities of 51 Peg (Martins+, 2015)J/AJ/153/138 : Radial velocity curve of 51 Peg (Birkby+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/646/A159https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/646/A159http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/646/A159https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/646/A159https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/646/A159http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/646/A159GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/646/A159/table1Stellar radial velocity measurements of 51 Peg from multiple observatoriesSetDataset identifier (3)meta.id;meta.datasetcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian Date (BJD-2400000) (BJD_TDB) (1)dtime.epochdoubleRV? Radial velocity (for ELODIE and HARPS data) (2)m/sphys.veloc;pos.heliocentricdoublenullableRVr? Relative radial velocity (for LICK and HIRES data) (2)m/sphys.veloc;pos.heliocentricdoublenullablee_RVUncertainty in RVm/sstat.errorfloat