J/AJ/163/257ivo://CDS.VizieR/J/AJ/163/257doi:10.26093/cds/vizier.51630257CDSAnthony F.Nunez A.Agueros M.A.Curtis J.L.do Nascimento J.-D. Jr,Machado J.M.Mann A.W.Newton E.R.Rampalli R.Thao Pa C.Wood M.L.2022-11-09T06:06:53Z2022-10-10T07:46:28ZCDS support team

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

cds-question@unistra.frm-starsdwarf-starsvisible-astronomyspectroscopyinfrared-astronomystellar-massesThe evolution of magnetism in late-type dwarfs remains murky, as we can only weakly predict levels of activity for M dwarfs of a given mass and age. We report results from our spectroscopic survey of M dwarfs in the Southern Continuous Viewing Zone (CVZ) of the Transiting Exoplanet Survey Satellite (TESS). As the TESS CVZs overlap with those of the James Webb Space Telescope, our targets constitute a legacy sample for studies of nearby M dwarfs. For 122 stars, we obtained at least one R~2000 optical spectrum with which we measure chromospheric H{alpha} emission, a proxy for magnetic field strength. The fraction of active stars is consistent with what is expected for field M dwarfs; as in previous studies, we find that late-type M dwarfs remain active for longer than their early-type counterparts. While the TESS light curves for ~20% of our targets show modulations consistent with rotation, TESS systematics are not well enough understood for confident measurements of rotation periods (Prot) longer than half the length of an observing sector. We report periods for 12 stars for which we measure Prot<~15days or find confirmation for the TESS-derived Prot in the literature. Our sample of 21 Prot, which includes periods from the literature, is consistent with our targets being spun-down field stars. Finally, we examine the H{alpha}-to- bolometric luminosity distribution for our sample. Two stars are rotating fast enough to be magnetically saturated, but are not, hinting at the possibility that fast rotators may appear inactive in H{alpha}.2022AJ....163..257Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/163/257CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/A+A/327/1039 : Structure and evolution of low-mass stars (Chabrier+ 1997)J/A+A/331/581 : Rotation and activity in field M dwarfs (Delfosse+ 1998)J/AJ/128/426 : Subdwarfs in the SDSS (West+, 2004)J/ApJ/646/297 : Spitzer observations of pre-main-sequence stars (Rebull+, 2006)J/MNRAS/407/465 : Fast-rotating M dwarfs in NGC2516 (Jackson+, 2010)J/AJ/141/97 : SDSS DR7 M dwarfs (West+, 2011)J/ApJ/743/48 : Stars with rotation periods & Xray luminosities (Wright+, 2011)J/AJ/144/93 : Close white dwarf + M dwarf binaries (WD+dM) (Morgan+, 2012)J/AJ/143/93 : Rotational velocities in early-M stars (Reiners+, 2012)J/ApJ/795/161 : Activity & rotation in Praesepe and the Hyades (Douglas+, 2014)J/ApJ/807/45 : Potent. habitable planets orbiting M dwarfs (Dressing+, 2015)J/ApJ/809/161 : X-ray obs. and membership probabilities of M37 (Nunez+, 2015)J/AJ/149/158 : The BUD sample. I. L dwarf activity sample (Schmidt+, 2015)J/AJ/152/8 : Impact stellar multiplicity planetary systems I. (Kraus+, 2016)J/A+A/600/A13 : HARPS M dwarf sample magnetic activity (Astudillo-Defru+, 2017)J/ApJ/842/83 : Praesepe members rotational periods K2 LCs (Douglas+, 2017)J/ApJ/834/85 : H{alpha} emission in nearby M dwarfs (Newton+, 2017)J/AJ/154/118 : WD+dMs from SUPERBLINK proper motion survey (Skinner+, 2017)J/ApJ/862/33 : Improved & expanded membership catalog NGC752 (Agueros+, 2018)J/AJ/156/259 : Robo-AO detected close binaries in Gaia DR2 (Ziegler+, 2018)J/ApJ/879/100 : K2 rotation periods Hyades & Praesepe members (Douglas+, 2019)J/ApJ/871/63 : How to constrain your M dwarf II. Nearby binaries (Mann+, 2019)J/ApJ/895/140 : EvryFlare. II. Parameters 122 cool flare stars (Howard+, 2020)J/A+A/635/A43 : Stellar rotation periods K2 Campaigns 0-18 (Reinhold+, 2020)J/AJ/162/147 : Rotation periods 43 TOIs with Evryscope & TESS (Howard+, 2021)J/AJ/161/277 : Sample of 45 H{alpha}EW outliers (Kiman+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/163/257https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/163/257http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/163/257https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/163/257https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/163/257http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/163/257GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/163/257/table1 (Properties of M dwarfs in the southern CVZ)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/163/257/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/163/257/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/163/257/table1?GETtext/xml+votable180.050000true71.21422194-70.444756110.0055555555555555565/9402 6/32861 33028 33037 33039 33046 33049 33053 33075 33103 33118 33127 33136 33141 33143 33792 33796 33800 33802 33805 33817 33820-33821 33837 33841 33848-33849 33870 33876 33892 37037 37039 37048 37051 37055 37378-37379 37384-37385 37392-37393 37397-37398 37403 37405-37406 37413 37419 37422-37423 37426-37427 37437 37443 37448 37450 37483 37506 37509 37519-37521 37524 37529 37539 37542 37548 37556-37557 37560 37563 37566 37569 37577-37578 37602-37604 38913 38925 38934 38936 38942 38945 38948 38953 38955-38957 38966 38970 38972 38976-38978 39053 39056 39059 39072 390808.650015785639275e-20 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/163/257?format=asciiOpticalInfrareddefaultJ/AJ/163/257/table1Properties of M dwarfs in the southern CVZrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS designationmeta.id;meta.maincharGaiaGaia EDR3 designationmeta.idcharRAJ2000[71/121] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-78/-55] Declination (J2000)degpos.eq.dec;meta.mainDist[8.83/77.7] Distance from Bailer-Jones+, 2021, I/352pcpos.distance;src.orbitalfloate_Dist[0.001/0.4] mean error on Distpcstat.errorfloatKsmag[5.44/12.97] Ks 2MASS magnitudemagphot.mag;em.IR.Kfloate_Ksmag[0.01/0.04] mean error on Ks magnitudemagstat.error;phot.magfloatrmag[8.38/18.45] r' magnitudemagphot.mag;em.opt.Rfloate_rmag[0/0.3] mean error on r' magnitudemagstat.error;phot.magfloatr_rmagSource for r' magnitude (1)meta.ref;pos.framecharGmag[8.28/17.1] Gaia EDR3 G magnitudemagphot.mag;em.opt.Vfloate_Gmag[0.002/0.003] mean error on G magnitudemagstat.error;phot.magfloatGRPmag[7.37/15.7] Gaia EDR3 G_RP_ magnitudemagphot.mag;em.opt.Rfloate_GRPmag[0.003/0.005] mean error on G_RP_ magnitudemagstat.error;phot.magfloatRUWE[0.83/9.92] Gaia EDR3 RUWE statisticstat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlcharNSpec[0/29] Number of spectrameta.numberintEWHa[-11.6/0.9]? Equivalent width of Halpha line0.1nmspect.line.eqWidthfloatnullablee_EWHa[0.003/1]? mean error of the equivalent width0.1nmstat.errorfloatnullableEWq[0.07/0.32]? Quiescent absorption equivalent width of the H-alpha line0.1nmspect.line.eqWidthfloatnullableProt[0.9/85]? Rotation perioddtime.periodfloatnullabler_ProtSource of rotation period measurement (2)meta.ref;pos.framecharMass[0.1/0.6] Stellar masssolMassphys.massfloattau[34.9/148] Convective turnover timedtime.intervalfloatchi[1.61/7.13] chi valuestat.fit.chi2floate_chi[0.1/1.8] mean error of the chi valuestat.errorfloat