J/A+A/626/A119ivo://CDS.VizieR/J/A+A/626/A119doi:10.26093/cds/vizier.36260119CDSGill S.Maxted P.F.L.Evans J.A.Evans D.F.Southworth J.Smalley B.,Gary B.L.Anderson D.R.Bouchy F.Cameron A.C.Dominik M.Faedi F.,Gillon M.Gomez Maqueo Chew L.Hebb Y.Hellier C.Jorgensen U.G.,Longa-Pena P.Martin D.V.McCormac J.Pepe F.V.Pollaco D.Queloz D.,Segransan D.Snodgrass C.Turner O.D.Triaud A.H.M.Udry S.West R.G.2019-07-26T14:08:11Z2019-07-05T13:10:02ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsradial-velocityphotometryvisible-astronomyspectroscopySome M-dwarfs around F-/G-type stars have been measured to be hotter and larger than predicted by stellar evolution models. Inconsistencies between observations and models need to be addressed with more mass, radius, and luminosity measurements of low-mass stars to test and refine evolutionary models. Our aim is to measure the masses, radii and ages of the stars in five low-mass eclipsing binary systems discovered by the WASP survey. We used WASP photometry to establish eclipse-time ephemerides and to obtain initial estimates for the transit depth and width. Radial velocity measurements were simultaneously fitted with follow-up photometry to find the best-fitting orbital solution. This solution was combined with measurements of atmospheric parameters to interpolate evolutionary models and estimate the mass of the primary star, and the mass and radius of the M-dwarf companion. We assess how the best fitting orbital solution changes if an alternative limb-darkening law is used and quantify the systematic effects of unresolved companions. We also gauge how the best-fitting evolutionary model changes if different values are used for the mixing length parameter and helium enhancement. We report the mass and radius of five M-dwarfs and find little evidence of inflation with respect to evolutionary models. The primary stars in two systems are near the "blue hook" stage of their post sequence evolution, resulting in two possible solutions for mass and age. We find that choices in helium enhancement and mixing-length parameter can introduce an additional 3-5% uncertainty in measured M-dwarf mass. Unresolved companions can introduce an additional 3-8% uncertainty in the radius of an M-dwarf, while the choice of limb-darkening law can introduce up to an additional 2% uncertainty. The choices in orbital fitting and evolutionary models can introduce significant uncertainties in measurements of physical properties of such systems.2019A&A...626A.119Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/626/A119CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/549/A18 : WASP-30 and J1219-39 light + velocity curves (Triaud+, 2013)J/A+A/572/A50 : J0113+31 light + velocity curves (Gomez Maqueo Chew+, 2014)J/A+A/604/L6 : EBLM J0555-57 photometry and RV (von Boetticher+, 2017)J/A+A/625/A150 : 10 very-low-mass stars photometry (von Boetticher+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/626/A119https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/626/A119http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/626/A119https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/626/A119https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/626/A119http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/626/A119GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/626/A119/table1 (List of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/626/A119/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/626/A119/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/626/A119/table1?GETtext/xml+votable180.050000true357.3134583-32.77152780.005555555555555556Cone search capability for table J/A+A/626/A119/list (List of fits spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/626/A119/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/626/A119/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/626/A119/list?GETtext/xml+votable180.050000true357.3135-32.771530.0055555555555555566/14909 16442 35325 44928 46468https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/626/A119?format=asciiOpticaldefaultJ/A+A/626/A119/table1List of studied starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.VfloatSNameSimbad namemeta.idcharRVrv indicates radial velocity data in rv.dat filemeta.codecharSAAOsaao indicates photometric data in saao.dat filemeta.codecharCTIOctio indicates photometric data in ctio.dat filemeta.codecharHAOhao indicates photometric data in hao.dat filemeta.codecharWASPwasp indicates photometric data in wasp.dat filemeta.codecharJ/A+A/626/A119/rvRadial velocitiesNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBarycentric Julian datedtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricdoublee_RVrms uncertainty on radial velocitykm/sstat.errordoubleJ/A+A/626/A119/ctioCTIO photometryNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBand[griz] CTIO observed bandinstr.bandpasscharBJDBarycentric Julian datedtime.epochdoublemagSAAO 1m magnitude in Bandmagphot.magdoublee_magrms uncertainty on magmagstat.error;phot.magdoubleJ/A+A/626/A119/haoHAO photometrymagSAAO 1m magnitude in Bandmagphot.magfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharBand[CBB gz ] HAO observed bandinstr.bandpasscharBJDBarycentric Julian datedtime.epochdoublee_magrms uncertainty on magmagstat.error;phot.magfloate_mag2Second rms uncertainty on magmagstat.errorfloatJ/A+A/626/A119/waspWASP photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharHJDHeliocentric Julian date, TDBdtime.epochdoubleJDJulian date, TDBdtime.epochdoubleBJDBarycentirc Julian date, TDBdtime.epochdoublemagWASP magnitudemagphot.magdoublee_magrms uncertainty on WASP magnitudemagstat.error;phot.magdoublePhasePhasetime.phasedoubleField[1/7] Field numbermeta.id;obs.fieldintJ/A+A/626/A119/listList of fits spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintObs.dateObservation datestime.epoch;obsnullableblambdaLower value of wavelength interval0.1nmem.wlfloatBlambdaUpper value of wavelength interval0.1nmem.wlfloatdlambdaWavelenght resolution0.1nmpos.angResolutionfloatsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitscharJ/A+A/626/A119/saaoSAAO photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharBand[RI] SAAO observed bandinstr.bandpasscharBJDBarycentric Julian datedtime.epochdoublemagSAAO 1m magnitude in Bandmagphot.magdoublee_magrms uncertainty on magmagstat.error;phot.magdouble