J/MNRAS/389/585ivo://CDS.VizieR/J/MNRAS/389/585doi:10.26093/cds/vizier.73890585CDSCasagrande L.Flynn C.Bessell M.2024-07-07T20:16:53Z2009-04-07T17:36:14ZCDS support team

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

cds-question@unistra.frdwarf-starsm-starsinfrared-photometryvisible-astronomybroad-band-photometryeffective-temperatureWe empirically determine effective temperatures and bolometric luminosities for a large sample of nearby M dwarfs, for which high accuracy optical and infrared photometry is available. We introduce a new technique which exploits the flux ratio in different bands as a proxy of both effective temperature and metallicity. Our temperature scale for late-type dwarfs extends well below 3000K (almost to the brown dwarf limit) and is supported by interferometric angular diameter measurements above 3000K. Our metallicities are in excellent agreement (usually within 0.2dex) with recent determinations via independent techniques. A subsample of cool M dwarfs with metallicity estimates based on hotter Hipparcos common proper motion companions indicates our metallicities are also reliable below 3000K, a temperature range unexplored until now. The high quality of our data allows us to identify a striking feature in the bolometric luminosity versus temperature plane, around the transition from K to M dwarfs. We have compared our sample of stars with theoretical models and conclude that this transition is due to an increase in the radii of the M dwarfs, a feature which is not reproduced by theoretical models.2008MNRAS.389..585Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/389/585CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/334/20 : UBV(RI)_c_ photometry of HIP red stars (Koen+, 2002)J/AJ/123/2822 : Photometry of southern NLTT stars (Reid+, 2002)J/AJ/126/3007 : Spectroscopy of faint red NLTT dwarfs (Reid+, 2003)J/AJ/128/463 : A preliminary 20pc census from NLTT catalogue (Reid+, 2004)J/MNRAS/373/13 : Lower main-sequence stars fund. param. (Casagrande+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/389/585https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/389/585http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/389/585https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/389/585https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/389/585http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/389/585GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/389/585/table1 (Observable and physical quantities for our sample stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/389/585/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/389/585/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/389/585/table1?GETtext/xml+votable180.050000true0.3576761-16.94844610.0055555555555555566/996 4104 4250 4304 4867 8208 8249 16462 16468 16481 16510 16635 16650 16669 16673 16755 16939 17087 17120 17155 17158 17202 17222 17235 17264 17288 17300 17348 17363 17372 17396 17412 17431 17433 17454-17455 17486 17495 17509 17542 17684 17699 17870 17978 18003 18017 18059 18195 18595 18604 18666 18743 18789 18913 19064 19090 19163 19265 19306 19352 19361 19516 19671 19776 20646 20661 20663 20728 20795 20803 20812 20939 21049 21151 21171 21180 21420 21473 21590 21607 21676 21780 22035 22060 22075 22148 22277 22535 22581 22615 22626 22687 22720 22738-22739 22760 22764 22787 22813 22825 22920 23056 23078 23363 23458 23482 23657 24588 24684 24713 24816 24819 24833 24851 24863 24886 24968 24970 24977 24995 25009 25016 25021 25084 25152 25196 25198 25209 25261 25279 25281 25283 25300 25363 25412 25443 25623 25669 26151 26161 26188 26244 26538 26587 26690 26731 26742 26757 26772 26844 26916 26961 27029 27110 27201 27260 27392 27453 27514 27602 27730 27734 27810 27894 28837 28978 29009 29105 29126 29154 29158 29193 29400 29430 29480 29482 29665 29700 29767 30407 30429 30464 30776 30869 31229 31787 33071 33462 33545 33966 34295 34301-34302 34648 34667 34701 34708 34718 34776 34847 34924 34942 35005 35057 35154 35335 35388 35640 35683 35779 35788 35815 35892 35918 35969 36028 36061 36182 36235 36382 36492 36496 36511 36541 36583 36735 36763 36793 36796 36807 36823 36828 36842 36862 36971 37005 37122 37257 37332 37524 37676 37767 38053 38675 38899 38932 39193 39417 39770 39778 39819 39853 39858 40250 40285 40368 40378 40388 40402 40411 40435-40436 40463 40475 40610 40623-40624 40631 40787 40794 40801 40811 40831 40858 40938 41252 41438 41543 41617 42216 42485 42544 42711 42739 42748 42889 42899 42912 43511 44214 44254 44308 44352 44518 44662 44681 44782 44786 44847 44866 45317 45434 45497 45537 45544 45970 46010 46123 46230 46289 46387 46448 46600 46622 46678 46752 46922 46926 46930 46999 47050 47061 47130 47337 47426 47946 48191 48265 48336 48351 48490 48744 48800 48926 48995 49015 49029 491018.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/389/585?format=asciiOpticalInfrareddefaultJ/MNRAS/389/585/table1Observable and physical quantities for our sample starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveinte_Teffrms uncertainty on TeffKstat.error;phys.temperature.effectiveintthetaAngular diametermasphys.angSizefloate_thetarms uncertainty on thetamasstat.error;pos.posAngfloatmBolApparent bolometric magnitude (1)magphot.mag.bolfloatVmagJohnson V magnitudemagphot.mag;em.opt.VfloatB-V? Johnson B-V colour indexmagphot.color;em.opt.B;em.opt.VfloatnullableU-B? Johnson U-B colour indexmagphot.color;em.opt.U;em.opt.BfloatnullableV-RcJohnson-Cousins V-Rc colour indexmagphot.color;em.opt.V;em.opt.RfloatV-IcJohnson-Cousins V-Ic colour indexmagphot.color;em.opt.V;em.opt.IfloatJmag2MASS Johnson J magnitudemagphot.mag;em.IR.JfloatHmag2MASS Johnson H magnitudemagphot.mag;em.IR.HfloatKsmag2MASS Johnson Ks magnitudemagphot.mag;em.IR.Kfloat[M/H]? Metallicity (2)phys.abund.ZfloatnullableSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main