J/A+A/664/A162ivo://CDS.VizieR/J/A+A/664/A162doi:10.26093/cds/vizier.36640162CDSMancini L.Esposito M.Covino E.Southworth J.Poretti E.Andreuzzi G.,Barbato D.Biazzo K.Borsato L.Bruni I.Damasso M.Di Fabrizio L.,Evans D.F.Granata V.Lanza A.F.Naponiello L.Nascimbeni V.,Pinamonti M.Sozzetti A.Tregloan-Reed J.Basilicata M.Bignamini A.,Bonomo A.S.Claudi R.Cosentino R.Desidera S.Fiorenzano A.F.M.,Giacobbe P.Harutyunyan A.Henning T.Knapic C.Maggio A.Micela G.,Molinari E.Pagano I.Pedani M.Piotto G.2022-09-30T23:24:46Z2022-08-29T09:05:40ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsradial-velocityphotometryvisible-astronomyThe measurement of the spin-orbit alignment of hot Jupiters, with a range of orbital and physical properties, can provide information about the evolution of the orbits of this special class of giant planets. We aim to refine the orbital and physical parameters and determine the sky-projected planet orbital obliquity, {lambda}, of five eccentric (e~0.1-0.3) transiting planetary systems: HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, and HAT-P-29, whose parent stars have an effective temperature between 5100K<Teff<6200K. Each of the systems hosts a hot Jupiter, except for HAT-P-26 that hosts a Neptune-mass planet. We observed transit events of these planets with the HARPS-N spectrograph, obtaining high-precision radial velocity measurements that allow us to measure the Rossiter-McLaughlin effect for each of the target systems. We used these new HARPS-N spectra and archival data, including those from Gaia, to better characterise the stellar atmospheric parameters. The photometric parameters for four of the hot Jupiters were recalculated using 17 new transit light curves, obtained with an array of medium-class telescopes, and data from the TESS space telescope. HATNet time-series photometric data were checked for the signatures of rotation periods of the target stars and their spin axis inclination. From the analysis of the Rossiter-McLaughlin effect we derived a sky-projected obliquity of {lambda}=13{deg}+/-6{deg}, {lambda}=-26.3{deg}+/-6.7{deg}, {lambda=-0.7{deg}+/-12.5{deg}, {lambda}=-26{deg}+/-16{deg}, for HAT-P-15 b, HAT-P-17 b, HAT-P-21 b and HAT-P-29 b, respectively. Based on theoretical considerations, these small values of {lambda} should be of primordial origin, with the possible exception of HAT-P-21. Due to the quality of the data, we were not able to well constrain {lambda} for HAT-P-26 b, although a prograde orbit is favoured ({lambda}=18{deg}+/-49{deg}). The stellar activity of HAT-P-21 indicates a rotation period of 15.88+/-0.02 days, which allowed us to determine its true misalignment angle {psi}=25{deg}+/-16{deg}. Our new analysis of the physical parameters of the five exoplanetary systems returned values compatible with those existing in the literature. Using TESS and the available transit lightcurves, we reviewed the orbital ephemeris for the five systems and confirmed that the HAT-P-26 system shows transit timing variations, which may tentatively be attributed to the presence of a third body.2022A&A...664A.162Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/664/A162CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/772/80 : Radial velocities of HAT-P-17 (Fulton+, 2013)J/ApJ/724/866 : Follow-up observations of HAT-P-15 (Kovacs+, 2010)J/ApJ/728/138 : Follow-up photometry of HAT-P-26 (Hartman+, 2011)J/ApJ/733/116 : HAT-P-28 and HAT-P-29 photometry (Buchhave+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/664/A162https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/664/A162http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/664/A162https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/664/A162https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/664/A162http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/664/A162GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/664/A162/stars (List of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/664/A162/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/664/A162/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/664/A162/stars?GETtext/xml+votable180.050000true66.24839.46061110.0055555555555555566/1275 2551 5475 13143 26062https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/664/A162?format=asciiOpticaldefaultJ/A+A/664/A162/starsList of studied starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (HAT-P-NN)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainrv[rv] Indicates RV data in rv.dat filemeta.codecharphot[phot ] Indicates photometric data in phot.dat filemeta.codecharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/664/A162/photPhotomoetry of HAT-P-17, HAT-P-21, HAT-P-26 and HAT-P-29recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (HAT-P-NN) (1)meta.id;meta.maincharObs.datObservation datetime.epoch;obsnullableInstInstrumentmeta.id;instrcharBand[RI] Observed bandinstr.bandpasscharBJDBarycentric JD for the midpoint of observation (TDB) (BJD-2400000)dtime.epochdoublemagDifferential magnitude of the targetmagphot.mag;arith.diffdoublee_magMeasurement error of the magnitudemagstat.error;phot.magdoubleJ/A+A/664/A162/rvRV measurements of HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26 and HAT-P-29 (HARPS-N 3.5m TNG)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar name (HAT-P-NN)meta.id;meta.maincharBJDBarycentric JD for the midpoint of observation (TDB) (BJD-2400000)dtime.epochdoubleRVRadial Velocity (RV) of the targetkm/sphys.veloc;pos.heliocentricdoublee_RVMeasurement error of RVkm/sstat.errorfloat