J/A+A/638/A5ivo://CDS.VizieR/J/A+A/638/A5doi:10.26093/cds/vizier.36380005CDSCarleo I.Malavolta L.Lanza A.F.Damasso M.Desidera S.Borsa F.,Mallonn M.Pinamonti M.Gratton R.Alei E.Benatti S.Mancini L.,Maldonado J.Biazzo K.Esposito M.Frustagli G.Gonzalez-Alvarez E.,Micela G.Scandariato G.Sozzetti A.Affer L.Bignamini A.Bonomo A.S.,Claudi R.Cosentino R.Covino E.Fiorenzano A.F.M.Giacobbe P.,Harutyunyan A.Leto G.Maggio A.Molinari E.Nascimbeni V.Pagano I.,Pedani M.Piotto G.Poretti E.Rainer M.Redfield S.Baffa C.,Baruffolo A.Buchschacher N.Billotti V.Cecconi M.Falcini G.,Fantinel D.Fini L.Galli A.Ghedina A.Ghinassi F.Giani E.,Gonzalez C.Gonzalez M.Guerra J.Hernandez Diaz M.Hernandez N.,Iuzzolino M.Lodi M.Oliva E.Origlia L.Perez Ventura H.Puglisi A.,Riverol C.Riverol L.San Juan J.Sanna N.Scuderi S.Seemann U.,Sozzi M.Tozzi A.2024-11-06T20:00:50Z2020-05-29T07:54:29ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsspectroscopyradial-velocityThe existence of hot Jupiters is still not well understood. Two main channels are thought to be responsible for their current location: a smooth planet migration through the proto-planetary disk or the circularization of an initial high eccentric orbit by tidal dissipation leading to a strong decrease of the semimajor axis. Different formation scenarios result in different observable effects, such as orbital parameters (obliquity/eccentricity), or frequency of planets at different stellar ages. In the context of the GAPS Young-Objects project, we are carrying out a radial velocity survey with the aim to search and characterize young hot-Jupiter planets. Our purpose is to put constraints on evolutionary models and establish statistical properties, such as the frequency of these planets from a homogeneous sample. Since young stars are in general magnetically very active, we performed multi-band (visible and near-infrared) spectroscopy with simultaneous GIANO-B + HARPS-N (GIARPS) observing mode at TNG. This helps to deal with stellar activity and distinguish the nature of radial velocity variations: stellar activity will introduce a wavelength-dependent radial velocity amplitude, whereas a Keplerian signal is achromatic. As a pilot study, we present here the cases of two already claimed hot Jupiters orbiting young stars: HD 285507 b and AD Leo b. Our analysis of simultaneous high-precision GIARPS spectroscopic data confirms the Keplerian nature of HD285507's radial velocities variation and refines the orbital parameters of the hot Jupiter, obtaining an eccentricity consistent with a circular orbit. On the other hand, our analysis does not confirm the signal previously attributed to a planet orbiting AD~Leo. This demonstrates the power of the multi-band spectroscopic technique when observing active stars.2020A&A...638A...5Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/638/A5CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/638/A5https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/638/A5http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/638/A5https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/638/A5https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/638/A5http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/638/A5GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/638/A5/hd2855-hHARPS-N radial velocities of HD 285507recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleRVRadial velocitieskm/sphys.veloc;pos.heliocentricfloate_RVRadial velocities errorkm/sstat.errorfloatBISBisectorkm/sphys.velocdoublee_BISBisector errorkm/sstat.errorfloatJ/A+A/638/A5/hd2855-gGIANO-B radial velocities of HD 285507recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleRVRadial velocitieskm/sphys.veloc;pos.heliocentricfloate_RVRadial velocities errorkm/sstat.errorfloatBISBisectorkm/sphys.velocdoublee_BISBisector errorkm/sstat.errorfloatJ/A+A/638/A5/adleo-h1HARPS-N radial velocities of AD Leo (dataset 1)RVRadial velocitieskm/sphys.veloc;pos.heliocentricfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoublee_RVRadial velocities errorkm/sstat.errorfloatBISBisectorkm/sphys.velocdoublee_BISBisector errorkm/sstat.errorfloatJ/A+A/638/A5/adleo-h2HARPS-N radial velocities of AD Leo (dataset 2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleRVRadial velocitieskm/sphys.veloc;pos.heliocentricfloate_RVRadial velocities errorkm/sstat.errorfloatBISBisectorkm/sphys.velocdoublee_BISBisector errorkm/sstat.errorfloatJ/A+A/638/A5/adleo-g1GIANO-B radial velocities of AD Leo (dataset 1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleRVRadial velocitieskm/sphys.veloc;pos.heliocentricfloate_RVRadial velocities errorkm/sstat.errorfloatBISBisectorkm/sphys.velocdoublee_BISBisector errorkm/sstat.errorfloatJ/A+A/638/A5/adleo-g2GIANO-B radial velocities of AD Leo (dataset 2)BISBisectorkm/sphys.velocdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleRVRadial velocitieskm/sphys.veloc;pos.heliocentricfloate_RVRadial velocities errorkm/sstat.errorfloate_BISBisector errorkm/sstat.errorfloatJ/A+A/638/A5/adleo-svSTELLA V-band photometric flux of AD LeorecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleFluxNormalized photometric flux V-bandphot.flux;arith.ratiofloate_FluxFlux errorstat.error;phot.fluxfloatJ/A+A/638/A5/adleo-siSTELLA I-band photometric flux of AD LeorecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleFluxNormalized photometric flux V-bandphot.flux;arith.ratiofloate_FluxFlux errorstat.error;phot.fluxfloat