J/A+A/664/A163ivo://CDS.VizieR/J/A+A/664/A163doi:10.26093/cds/vizier.36640163CDSNardiello D.Malavolta L.Desidera S.Baratella M.D'Orazi V.,Messina S.Biazzo K.Benatti S.Damasso M.Rajpaul V. M.Bonomo A.S.,Capuzzo Dolcetta R.Mallonn M.Cale B.Plavchan P.El Mufti M.,Bignamini A.Borsa F.Carleo I.Claudi R.Covino E.Lanza A.F.,Maldonado J.Mancini L.Micela G.Molinari E.Pinamonti M.Piotto G.,Poretti E.Scandariato G.Sozzetti A.Andreuzzi G.Boschin W.,Cosentino R.Fiorenzano A. F. M.Harutyunyan A.Knapic C.Pedani M.,Affer L.Maggio A.Rainer M.2022-11-13T17:28:59Z2022-08-29T09:53:28ZCDS support team

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

cds-question@unistra.frmultiple-starsexoplanetsradial-velocityphotometryvisible-astronomyGreat strides have been made in recent years in the understanding of the mechanisms involved in the formation and evolution of planetary systems; despite this, many observational facts still do not have an explanation. A great contribution to the study of planetary formation processes comes from the study of young, low-mass planets, with short orbital periods (<100 days). In the last three years, the NASA/TESS satellite has identified many planets of this kind, and their characterization is clearly mandatory to understand how they formed and evolved.Within the framework of the Global Architecture of Planetary System (GAPS) project, we performed the validation and characterization (radius and mass) of the ultra-short period planet TOI-1807 b, orbiting its young host star BD+39 2643 (~300Myr) in only 13-hours. This is the youngest ultra-short period planet discovered so far. Thanks to a joint modeling of the stellar activity and planetary signals in the TESS light curve and in new HARPS-N radial-velocity measurements, which were combined with accurate estimation of stellar parameters, we validated the planetary nature of TOI-1807 b and measured its orbital and physical parameters. By using astrometric, photometric, and spectroscopic observations we found that BD+39 2643 is a young, active K dwarf star, member of a 300+/-80Myr old moving group and that it rotates in P_rot_=8.8+/-0.1-days. This star hosts an ultra-short period planet showing an orbital period of only P_b_=0.54937+/-0.00001-days. Thanks to the exquisite photometric and spectroscopic series, and the accurate information on the stellar activity, we measured both the radius and the mass of TOI-1807 b with high precision, obtaining R_P,b_=1.37+/-0.09R_{Earth}_ and M_P,b_=2.57+/-0.50M_{Earth}_. These planet parameters correspond to a rocky planet with an Earth-like density (rho_b_=1.0+/-0.3rho_{Earth}_) and no extended H/He envelope. From the analysis of the age-R_P distribution for planets with well measured ages, we inferred that TOI-1807 b may have already lost a large part of its atmosphere during its 300Myr life.2022A&A...664A.163Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/664/A163CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)I/345 : Gaia DR2 (Gaia Collaboration, 2018)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/664/A163https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/664/A163http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/664/A163https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/664/A163https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/664/A163http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/664/A163GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/664/A163/tableb1 (Catalog of stars likely members of TOI-1807's moving group)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/664/A163/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/664/A163/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/664/A163/tableb1?GETtext/xml+votable180.050000true1.56588958.43670.0055555555555555566/46 1703 1932 3006 4926 5149 5439 7220 7443 8512 8552 8574 8786 8861 8981 9173 9415 9923 9929 10090 10491 10593 10670 10771 10826 11008 11445 11844 11853 11857 11949 13614 13846 14706 15127 16136 20163 20261 20682 22571 22691 24955 25023 27712 28123 28268 28343 28346 28611 29486 29513 30451 30783 31010 31306 31415 31866 31900 32772 34376 34902 35902 35906 38846 39008 39114 40101 41479 46860 48361 48442 486911.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/664/A163?format=asciiOpticaldefaultJ/A+A/664/A163/tableb1Catalog of stars likely members of TOI-1807's moving groupSimbadNameSimbad column added by the CDSmeta.idcharnullable(G-K)0? (G-K) color corrected for reddeningmagphot.color;em.opt;em.IRfloatnullableP? Variability period from TESS light curvesdsrc.varfloatnullablee_P? Error on the variability perioddstat.errorfloatnullablegradeGrade of confidence on the correctness of Pstat.fit.paramcharEWLi? Lithium Equivalent Width0.1pmspect.line.eqWidthfloatnullablee_EWLi? Error on the Lithium Equivalent Width0.1pmstat.errorfloatnullableCoeval[NY ?] Coeval to TOI-1807's flagmeta.codecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDName of the starmeta.id;meta.maincharTICTIC v8 identification numbermeta.idlongRAJ2000Right Ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.mainGmag? Gaia G magnitudemagphot.mag;em.optfloatnullableJ/A+A/664/A163/tablee1TOI-1807 (BD+39 2643) HARPS-N spectroscopic series obtained in the 1st seasonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVError on the radial velocitykm/sstat.errorfloatlogRHKCa II H&K lines (log(R'_HK_))phot.flux;arith.ratiofloate_logRHKError on Ca II H&K lines (log(R'_HK_))stat.errorfloatBISCCF Bisectorkm/sphys.velocfloatJ/A+A/664/A163/tablee2TOI-1807 (BD+39 2643) HARPS-N spectroscopic series obtained in the 2nd seasonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVError on the radial velocitykm/sstat.errorfloatlogRHKCa II H&K lines (log(R'_HK_))phot.flux;arith.ratiofloate_logRHKError on Ca II H&K lines (log(R'_HK_))stat.errorfloatBISCCF Bisectorkm/sphys.velocfloatJ/A+A/664/A163/tablee3TOI-1807 (BD+39 2643) iSHELL radial velocity seriesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleRVRadial velocitym/sphys.veloc;pos.heliocentricfloate_RVError on the radial velocitym/sstat.errorfloatJ/A+A/664/A163/lcs22TESS light curve of TOI-1807 (BD+39 2643) for Sector 22QualQuality flag (1)meta.code.qualintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric TESS Julian Date (BJD-2450000)dtime.epochdoubleindexedFluxSAPUncorrected Simple Aperture Photometry fluxphot.flux.density;em.optdoubleFluxSAPcCorrected Simple Aperture Photometry fluxphot.flux.density;em.optdoubleSkyLocalLocal backgroundinstr.backgrounddoubleXposX-position on the CCDpixpos.cartesian.x;instr.detdoubleYPosY-position on the CCDpixpos.cartesian.y;instr.detdoubleJ/A+A/664/A163/lcs23TESS light curve of TOI-1807 (BD+39 2643) for Sector 23QualQuality flag (1)meta.code.qualintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeBarycentric TESS Julian Date (BJD-2450000)dtime.epochdoubleindexedFluxSAPUncorrected Simple Aperture Photometry fluxphot.flux.density;em.optdoubleFluxSAPcCorrected Simple Aperture Photometry fluxphot.flux.density;em.optdoubleSkyLocalLocal backgroundinstr.backgrounddoubleXposX-position on the CCDpixpos.cartesian.x;instr.detdoubleYPosY-position on the CCDpixpos.cartesian.y;instr.detdouble