J/A+A/652/A127ivo://CDS.VizieR/J/A+A/652/A127doi:10.26093/cds/vizier.36520127CDSGrieves N.Bouchy F.Lendl M.Carmichael T.Mireles I.Shporer A.,Mcleod K.K.Collins K.A.Brahm R.Stassun K.G.Gill S.Bouma L.G.,Guillot T.Cointepas M.Dos Santos L.A.Casewell S.L.Jenkins J.M.,Henning T.Nielsen L.D.Psaridi A.Udry S.Segransan D.Eastman J.D.,Zhou G.Abe L.Agabi A.Bakos G.Charbonneau D.Collins K.I.,Colon K.D.Crouzet N.Dransfield G.Evans P.Goeke R.F.Hart R.,Irwin J.M.Jensen E.L.N.Jordan A.Kielkopf J.F.Latham D.W.,Marie-sainte W.Mekarnia D.Nelson P.Quinn S.N.Radford D.J.,Rodriguez D.R.Rowden P.Schmider F.-X.Schwarz R.P.Smith J.C.,Stockdale C.Suarez O.Tan T.-G.Triaud A.H.M.J.Waalkes W.Wingham G.2022-10-10T15:17:42Z2021-12-10T15:22:41ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsstellar-massesstellar-radiieffective-temperaturemetallicityvisible-astronomyWe report the discovery of five transiting companions near the hydrogen-burning mass limit in close orbits around main sequence stars originally identified by the Transiting Exoplanet Survey Satellite (TESS) as TESS objects of interest (TOIs): TOI-148, TOI-587, TOI-681, TOI-746, and TOI-1213. Using TESS and ground-based photometry as well as radial velocities from the CORALIE, CHIRON, TRES, and FEROS spectrographs, we found the companions have orbital periods between 4.8 and 27.2 days, masses between 77 and 98M_Jup_ , and radii between 0.81 and 1.66 R_Jup_ . These targets have masses near the uncertain lower limit of hydrogen core fusion (~73-96M_Jup_ ), which separates brown dwarfs and low-mass stars. We constrained young ages for TOI-587 (0.2+/-0.1Gyr) and TOI-681 (0.17+/-0.03Gyr) and found them to have relatively larger radii compared to other transiting companions of a similar mass. Conversely we estimated older ages for TOI-148 and TOI-746 and found them to have relatively smaller companion radii. With an effective temperature of 9800+/-200K, TOI-587 is the hottest known main-sequence star to host a transiting brown dwarf or very low-mass star. We found evidence of spin-orbit synchronization for TOI-148 and TOI-746 as well as tidal circularization for TOI-148. These companions add to the population of brown dwarfs and very low-mass stars with well measured parameters ideal to test formation models of these rare objects, the origin of the brown dwarf desert, and the distinction between brown dwarfs and hydrogen-burning main sequence stars.2021A&A...652A.127Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/652/A127CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIV/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/652/A127https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/652/A127http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/652/A127https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/652/A127https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/652/A127http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/652/A127GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/652/A127/table4 (Published 13-150M_Jup_ transiting companions as of June 2021)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/652/A127/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/652/A127/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/652/A127/table4?GETtext/xml+votable180.050000true109.1045417-31.24441670.0055555555555555566/3249 4620 4698 4866 5659 13269 13579 14555 14573 14762 14764 14770 14780 14931 15137 15148 17300 17605 18638 20376 20476 20538 20669 23620 27005 29045 30150 30293 30439 31450 33140 33542 33861 34084 34773 34905 36374 37218 37247 37519 37594 37923 38246 39331 39826 40222 40518 43698 44391 44939 46458 46854https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/652/A127?format=asciiOpticaldefaultJ/A+A/652/A127/table4Published 13-150M_Jup_ transiting companions as of June 2021SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName (1)meta.id;meta.maincharM2Mass of the companion(1.898187x10+27kg)phys.massfloatE_M2Error on M2, upper value(1.898187x10+27kg)stat.error;stat.maxfloate_M2Error on M2, lower value(1.898187x10+27kg)stat.errorfloatR2Radius of the companion(7.1492x10+7m)phys.angSize;srcfloatE_R2Error on R2, upper value(7.1492x10+7m)stat.error;stat.maxfloate_R2Error on R2, lower value(7.1492x10+7m)stat.errorfloatPPerioddtime.periodfloatl_eccLimit flag on eccmeta.code.errorchareccEccentricitysrc.orbital.eccentricityfloatn_ecc[f] f for fixedmeta.notecharE_ecc? Error on ecc, upper valuestat.error;stat.maxfloatnullablee_ecc? Error on ecc, lower valuestat.errorfloatnullableM1? Mass of the star(5.97236x10+24kg)phys.massfloatnullableE_M1? Error on M1, upper value(5.97236x10+24kg)stat.error;stat.maxfloatnullablee_M1? Error on M1, lower value(5.97236x10+24kg)stat.errorfloatnullableR1Radius of the star(6.3781x10+6m)phys.angSize;srcfloatE_R1Error on R1, upper value(6.3781x10+6m)stat.error;stat.maxfloate_R1Error on R1, lower value(6.3781x10+6m)stat.errorfloatTeff? Effective temperatureKphys.temperature.effectiveintnullableE_Teff? Error on Teff, upper valueKstat.error;stat.maxintnullablee_Teff? Error on Teff, lower valueKstat.error;phys.temperature.effectiveintnullable[Fe/H]? Metallicityphys.abund.ZfloatnullableE_[Fe/H]? Error on [Fe/H], upper valuestat.error;stat.maxfloatnullablee_[Fe/H]? Error on [Fe/H], lower valuestat.error;phys.abund.FefloatnullableRefReference, in refs.dat filemeta.ref;pos.frame;meta.filechar_RAPositions from Simbad (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad (declination part)degpos.eq.dec;meta.mainJ/A+A/652/A127/refsReferencesComCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.noteintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorchar