J/AJ/161/172ivo://CDS.VizieR/J/AJ/161/172doi:10.26093/cds/vizier.51610172CDSDieterich S.B.Simler A.Henry T.J.Jao W.-C.2024-10-11T20:10:04Z2021-07-06T07:34:22ZCDS support team

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

cds-question@unistra.frdwarf-starsm-starsvisible-astronomyspectroscopyinfrared-astronomyWe use HST/STIS optical spectroscopy of 10 M-dwarfs in five closely separated binary systems to test models of M-dwarf structure and evolution. Individual dynamical masses ranging from 0.083 to 0.405M{sun} for all stars are known from previous work. We first derive temperature, radius, luminosity, surface gravity, and metallicity by fitting the BT-Settl atmospheric models. We verify that our methodology agrees with empirical results from long-baseline optical interferometry for stars of similar spectral types. We then test whether or not evolutionary models can predict those quantities given the stars' known dynamical masses and the conditions of coevality and equal metallicity within each binary system. We apply this test to five different evolutionary model sets: the Dartmouth models, the MESA/MIST models, the models of Baraffe et al., the PARSEC models, and the YaPSI models. We find marginal agreement between evolutionary model predictions and observations, with few cases where the models respect the condition of coevality in a self-consistent manner. We discuss the pros and cons of each family of models and compare their predictive power.2021AJ....161..172Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/172CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/AJ/106/773 : Mass-luminosity relation (Henry+, 1993)J/A+A/327/1039 : Structure and evolution of low-mass stars (Chabrier+, 1997)J/AJ/129/413 : New high proper motion stars (-90<DE47) (Subasavage+, 2005)J/AJ/130/1658 : High proper motion stars (-47<{delta}<00) (Subasavage+, 2005)J/AJ/133/2898 : New proper-motion stars (-90<DE< -47) (Finch+, 2007)J/AJ/134/252 : New nearby white dwarf systems (Subasavage+, 2007)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/AJ/141/21 : CCD distance estimates of SCR targets (Winters+, 2011)J/AJ/142/10 : New proper motion stars 0.40"/yr>pm>=0.18"/yr (Boyd+, 2011)J/AJ/142/92 : New proper motion stars with pm>=0.18"/yr (Boyd+, 2011)J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)J/AJ/143/93 : Rotational velocities in early-M stars (Reiners+, 2012)J/AJ/144/64 : Solar neighborhood. XXVIII. Substellar comp. (Dieterich+,2012)J/ApJ/748/93 : K-band spectra for 133 nearby M dwarfs (Rojas-Ayala+, 2012)J/ApJ/779/188 : Spectra of nearby late K and M Kepler stars (Mann+, 2013)J/AJ/147/85 : Solar neighborhood. XXXIII. 45 M dwarfs (Riedel+, 2014)J/AJ/147/94 : Solar neighborhood. XXXII. L and M dwarfs (Dieterich+, 2014)J/AJ/149/5 : Solar neighborhood. XXXV. Dist to M dwarfs (Winters+, 2015)J/AJ/150/6 : Solar neighborhood. XXXVI. VRI variab. M dwarfs (Hosey+, 2015)J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)J/AJ/152/141 : Solar neighborhood. XXXVII. RVs for M dwarfs (Benedict+, 2016)J/AJ/153/14 : Solar neighborhood XXXVIII. Nearby M dwarf (Winters+, 2017)J/AJ/154/32 : Solar neighborhood. XXXIX. White dwarfs (Subasavage+, 2017)J/AJ/154/151 : The solar neighborhood .XXXX. New young stars (Bartlett+,2017)J/AJ/154/124 : M dwarfs-long-term photometric variability (Clements+, 2017)J/AJ/154/191 : The solar neighborhood. XLII. New nearby subdwarfs (Jao+,2017)J/A+A/620/A180 : Stellar properties of M dwarfs (Rajpurohit+, 2018)J/AJ/156/49 : The solar neighborhood. XLIII. New nearby stars (Riedel+,2018)J/AJ/155/265 : The solar neighborhood. XLIV. RECONS discoveries (Henry+,2018)J/AJ/157/216 : Stellar multipl. rate of Mdwarfs within 25pc (Winters+, 2019)J/AJ/160/215 : The solar neighborhood.XLVI. M dwarf binaries (Vrijmoet+,2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/172https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/172http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/172https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/172https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/172http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/172GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/161/172/table1 (*Astrometric Properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/161/172/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/161/172/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/161/172/table1?GETtext/xml+votable180.050000true8.12291767.2343330.0055555555555555566/1477 3751 7132 14772 27730https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/161/172?format=asciiOpticalInfrareddefaultJ/AJ/161/172/table1*Astrometric PropertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarDesignation of the starmeta.id;meta.maincharprimaryf_Star[a] a = Parallax from Gaia DR2 (2 occurrences)meta.codecharRAJ2000[0/19] System Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[8/67] System degree of declination (J2000)pos.eq.dec;meta.mainPlx[65.2/213.1] Parallaxmaspos.parallaxfloate_Plx[0.3/0.6] Error on Plxmasstat.error;pos.parallaxfloata[271.2/826.7] Semi-major axis (1)masphys.angSize.smajAxis;src.orbitalfloate_a[0.7/2.7] Error on amasstat.errorfloatPer[4066.1/6147] Perioddtime.periodfloate_Per[2.2/27.5] Error on Perdstat.errorfloatMass[0.08/0.405] Star masssolMassphys.massfloate_Mass[0.001/0.081] Error on MasssolMassstat.error;phys.massfloatObs[2012/2013] Year of observationtime.epochSep[152/598] Approximative separationmaspos.angDistanceintspectrumInteractive Plotmeta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharJ/AJ/161/172/fluxSTIS spectra for 10 M-dwarfs (figure1 + figure2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar Identifiermeta.id;meta.maincharWaveWavelength; Angstroms0.1nmem.wldoubleFluxFlux; erg/s/cm^2^/AngstromcW.m**-2.nm**-1phot.fluxdouble