J/AJ/165/192ivo://CDS.VizieR/J/AJ/165/192doi:10.26093/cds/vizier.51650192CDSGarcia Soto A.Newton E.R.Douglas S.T.Burrows A.Kesseli A.Y.2025-02-20T20:11:13Z2023-10-03T05:43:32ZCDS support team

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

cds-question@unistra.frm-starsvisible-astronomyh-alpha-photometrystellar-massesstellar-radiitrigonometric-parallaxWhile many M-dwarfs are known to have strong magnetic fields and high levels of magnetic activity, we are still unsure about the properties of their starspots and the origin of their magnetic dynamos. Both starspots and chromospheric heating are generated by the surface magnetic field; they produce photometric variability and H{alpha} emission, respectively. Connecting brightness variations to magnetic activity therefore provides a means to examine M-dwarf magnetism. We survey 30M dwarfs previously identified as fast rotating stars (Prot<10days). We present time-series optical photometry from the Transiting Exoplanet Survey Satellite (TESS) and contemporaneous optical spectra obtained using the Ohio State Multi-Object Spectrograph (OSMOS) on the 2.4m Hiltner telescope at MDM Observatory in Arizona. We measure rotation periods and photometric amplitudes from TESS light curves using Gaussian Processes. From the OSMOS spectra, we calculate the equivalent width of H{alpha}, and LH{alpha}/Lbol. We find a weak positive correlation between H{alpha} luminosity and the semiamplitude, Rvar (p=0.005_-0.005_^+0.075^). We also observe short-term variability (between 20 and 45minutes) in H{alpha} equivalent widths and possible enhancement from flares consistent to recent literature.2023AJ....165..192Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/165/192CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/337 : Gaia DR1 (Gaia Collaboration, 2016)I/345 : Gaia DR2 (Gaia Collaboration, 2018)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)VI/156 : M-dwarf Lum-Temp-Radius relationships (Morrell+, 2019)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/A+A/394/505 : UBV photometry of LQ Hya (Berdyugina+, 2002)J/AJ/123/3356 : Palomar/MSU nearby star spectro survey. III. (Gizis+, 2002)J/AJ/128/426 : Subdwarfs in the SDSS (West+, 2004)J/MNRAS/390/545 : Magnetic field and velocity of early M dwarfs (Donati+, 2008)J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)J/MNRAS/390/567 : Magnetic field and velocity of mid M dwarfs (Morin+, 2008)J/MNRAS/407/2269 : Polarisation of a sample of late M dwarfs (Morin+, 2010)J/AJ/141/166 : HATNet variability survey of K and M dwarfs (Hartman+, 2011)J/ApJ/728/48 : Multicolor eclipse data for 6 new binaries (Kraus+, 2011)J/AJ/141/97 : SDSS DR7 M dwarfs (West+, 2011)J/ApJ/743/48 : Star with rotation periods & Xray luminosities (Wright+, 2011)J/MNRAS/423/2966 : Low-mass stars spectroscopy in NGC 2516 (Jackson+, 2012)J/AcA/62/67 : ASAS photometry of ROSAT sources (Kiraga, 2012)J/AJ/143/93 : Rotational velocities in early-M stars (Reiners+, 2012)J/AcA/63/53 : ASAS photometry of ROSAT sources. II. (Kiraga+, 2013)J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)J/ApJ/795/161 : Activity & rotation in Praesepe & the Hyades (Douglas+, 2014)J/MNRAS/441/2361 : Stellar magnetism, age and rotation (Vidotto+, 2014)J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)J/ApJ/829/23 : Stellar flares from Q0-Q17 Kepler LCs (Davenport, 2016)J/ApJ/821/93 : Rotation & Galactic kinematics of mid M dwarfs (Newton+, 2016)J/A+A/597/A47 : CARMENES input catalogue of MdwarfsII (Cortes-Contreras+ 2017)J/ApJ/837/96 : Rotation-Activity Corr. in KMdwarfs II. (Houdebine+, 2017)J/ApJ/834/85 : H{alpha} emission in nearby M dwarfs (Newton+, 2017)J/MNRAS/474/2094 : Inferring probabilistic stellar rot periods (Angus+, 2018)J/MNRAS/475/1960 : ESPaDOnS spectropolarimeter obs. of M dwarfs (Fouque+, 2018)J/AJ/155/225 : Mdwarf rotational broadening measurements (Kesseli+, 2018)J/ApJ/855/75 : 24 years monitoring of Sun and Sun-like stars (Radick+, 2018)J/A+A/612/A49 : 324 CARMENES M dwarfs velocities (Reiners+, 2018)J/AJ/156/102 : TESS Input Catalog and Candidate Target List (Stassun+, 2018)J/AJ/156/178 : NIR transmission spectra of TRAPPIST-1 planets (Zhang+, 2018)J/ApJ/871/63 : How to constrain Mdwarf. II. Nearby binaries (Mann+, 2019)J/AJ/157/216 : Stellar multiplicity of Mdwarfs within 25pc (Winters+, 2019)J/MNRAS/495/2949 : Stellar activity with LAMOST. III. (Fang+, 2020)J/A+A/638/A20 : Mdwarfs Xray activity and rotation relations (Magaudda+, 2020)J/ApJ/905/107 : Spectroscopic activity indicators of TIC stars (Medina+, 2020)J/AJ/161/36 : 117 exoplanets habitable zone with Kepler DR25 (Bryson+, 2021)J/AJ/161/63 : Mdwarfs masses 0.1<~M/M{sun}<~0.3 within 15pc (Winters+, 2021)J/AJ/164/115 : TESS Hunt for Young & Maturing Exoplanets VII. (Newton+, 2022)J/A+A/662/A41 : Magnetic fields in 292 M dwarfs. (Reiners+, 2022)J/ApJS/264/17 : Spectroscopic data of TESS objects with LAMOST (Zhang+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/165/192https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/165/192http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/165/192https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/165/192https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/165/192http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/165/192GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/165/192/table1 (Parameters for some M-dwarfs in our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/165/192/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/165/192/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/165/192/table1?GETtext/xml+votable180.050000true127.455636726.77600670.0055555555555555566/1635 1911 2922 3387 4462 4976 5000 5387 5428 5652 6888 7681 7689 8163 11291 11363 12090 12184 13451 13748 14781 15355 16296 19957 20314 20472 22289 23391 23443 34776https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/165/192?format=asciiOpticaldefaultJ/AJ/165/192/table1Parameters for some M-dwarfs in our sampleE_Prot[0/0.2] Upper Bound: error on perioddstat.error;stat.maxfloatLitProt[0.11/7.78] Fiducial rotational periods from the literaturedphysdoubler_LitProtReferences for LitProt (3)meta.refintRvar[0/0.03] Photometric amplitudes measurements (6)src.var.amplitudefloate_Rvar[0/0.01] Lower Bound: error on Rvarstat.errorfloatE_Rvar[0/0.01] Upper Bound: error on Rvarstat.error;stat.maxfloatEWHa[-12.6/-2.83] Mean target Halpha Equivalent Widths (7)0.1nmspect.line.eqWidth;stat.meandoubleLHa/Lbol[0/0.01] Fractional Halpha luminosity/bolometric luminosity (derived from color)phys.luminosity;arith.ratiofloatTmag[8.33/13.9] T-magnitude from TESSmagphot.mag;em.optfloatKsmag[5.69/10.9] Ks-magnitude from 2MASSmagphot.mag;em.IR.Kfloatplx[0.03/0.28] Parallax from Gaia (DR2 or DR3), roundedmaspos.parallax.trigfloate_plx[0/0.01] Errors on plxmasstat.error;pos.parallaxfloatRUWE[0.95/1.58] RUWE value from Gaiastat.errorfloatTESS-CR[0/0.14] TESS Contamination Ratio value from MASTstat.value;arith.ratiofloatSpTSpectral Types from SIMBADsrc.spTypecharObsObservation month (8)time.epochnullableFlagsFlare removal flags (9)meta.code.errorchar_RAPosition from SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPosition from SIMBAD (declination part)degpos.eq.dec;meta.mainSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTICTESS identifiermeta.id;meta.mainlong2MASS2MASS position based identifiermeta.idcharMass[0.09/0.42] Target's mass (1)solMassphys.massfloate_Mass[0/0.01] Errors on mass (1)solMassstat.error;phys.massfloatRad[0.12/0.43] Target radius (2)solRadphys.size.radiusfloate_Rad[0/0.02] Lower bound error on radius (2)solRadstat.errorfloatE_Rad[0/0.02] Upper bound: error on radius (2)solRadstat.error;stat.maxfloatvsini[3.6/66] vsini measurements from literaturekm/sphys.veloc.rotatfloate_vsini[0.2/3.5] error on vsinikm/sstat.error;phys.veloc.rotatfloatr_vsiniReferences for the vsini measurementsmeta.refinti[17.4/88.8] Target inclination (4)degsrc.orbital.inclinationfloate_i[0.8/19] Errors on inclinationdegstat.errorfloatProt[0.11/7.75] Rotational periods (5)dphysfloate_Prot[0/0.2] Lower Bound: error on perioddstat.errorfloat