J/AJ/161/285ivo://CDS.VizieR/J/AJ/161/285doi:10.26093/cds/vizier.51610285CDSBenedict G.F.Franz O.G.Horch E.P.Prato L.Torres G.McArthur B.E.,Wasserman L.H.Latham D.W.Stefanik R.P.Latham C.Skiff B.A.2022-03-07T07:22:18Z2021-09-24T07:32:22ZCDS support team

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

cds-question@unistra.frmultiple-starsvisible-astronomyspectroscopyinfrared-astronomyradial-velocityline-intensitiesdwarf-starsWe extend results first announced by Franz et al., that identified vA351=H346 in the Hyades as a multiple star system containing a white dwarf. With Hubble Space Telescope Fine Guidance Sensor fringe tracking and scanning, and more recent speckle observations, all spanning 20.7years, we establish a parallax, relative orbit, and mass fraction for two components, with a period, P=2.70yr and total mass 2.1M{sun}. With ground-based radial velocities from the McDonald Observatory Otto Struve 2.1m Telescope Sandiford Spectrograph, and Center for Astrophysics Digital Speedometers, spanning 37 years, we find that component B consists of BC, two M-dwarf stars orbiting with a very short period (P_BC_=0.749days), having a mass ratio M_C_/M_B_=0.95. We confirm that the total mass of the system can only be reconciled with the distance and component photometry by including a fainter, higher-mass component. The quadruple system consists of three M dwarfs (A, B, C) and one white dwarf (D). We determine individual M-dwarf masses M_A_=0.53{+/-}0.10M{sun}, M_B_=0.43{+/-}0.04M{sun}, and M_C_=0.41{+/-}0.04M{sun}. The white dwarf mass, 0.54{+/-}0.04M{sun}, comes from cooling models, an assumed Hyades age of 670Myr, and consistency with all previous and derived astrometric, photometric, and radial velocity results. Velocities from H{alpha} and HeI emission lines confirm the BC period derived from absorption lines, with similar (HeI) and higher (H{alpha}) velocity amplitudes. We ascribe the larger H{alpha} amplitude to emission from a region each component shadows from the other, depending on the line of sight.2021AJ....161..285Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/285CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/317 : The PPMXL Catalog (Roeser+ 2010)I/345 : Gaia DR2 (Gaia Collaboration, 2018)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)J/AJ/80/379 : Hyades cluster: motion, membership, and distance (Hanson+,1975)J/A+A/331/81 : Hyades membership (Perryman+ 1998)J/A+A/367/111 : A Hipparcos study of the Hyades cluster (de Bruijne+, 2001)J/AJ/132/1221 : VJHK and SDSS photometry of DA white dwarfs (Holberg+, 2006)J/MNRAS/390/545 : Magnetic field and velocity of early M dwarfs (Donati+,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/142/187 : HST observations of 7 Pop.II variable stars (Benedict+, 2011)J/AJ/142/112 : KIC photometric calibration (Brown+, 2011)J/ApJ/730/128 : Spectroscopy of DA WD from the SDSS-DR4 (Tremblay+, 2011)J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)J/ApJ/745/58 : Light curves of the PMS eclipsing binary Par 1802 (Gomez+,2012)J/AJ/143/10 : 2008-2009 WIYN speckle observations binaries VII (Horch+, 2012)J/A+A/551/A142 : 7 year Swift-XRT point source catalog (1SWXRT) (D'Elia+, 2013)J/A+A/577/A128 : CARMENES input catalogue M dwarfs. I (Alonso-Floriano+, 2015)J/AJ/150/151 : DSSI obs. of binaries. VI. Measures in 2014 (Horch+, 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/A+A/601/A19 : Gaia DR1 open cluster members (Gaia Collaboration+, 2017)J/AJ/153/212 : Observations of binary stars at WIYN telescope (Horch+, 2017)J/ApJ/834/85 : H{alpha} emission in nearby M dwarfs (Newton+, 2017)J/A+A/626/A111 : Proxima Cen flare activity temporal changes (Pavlenko+,2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/285https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/285http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/285https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/285https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/285http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/285GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/161/285/table3CE absorption line radial velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date; JD-2400000.5dtime.epochdoubleRVelARadial velocity of component Akm/sphys.veloc;pos.heliocentricfloate_RVelAUncertainty in RVelAkm/sstat.errorfloatRVelB? Radial velocity of component Bkm/sphys.veloc;pos.heliocentricfloatnullablee_RVelB? Uncertainty in RVelBkm/sstat.errorfloatnullableRVelC? Radial Velocity of component Ckm/sphys.veloc;pos.heliocentricfloatnullablee_RVelC? Uncertainty in RVelCkm/sstat.errorfloatnullableBCphaseOrbital phase of components B and Ctime.phasefloatADBCphaseOrbital phase of components AD and BCtime.phasefloatJ/AJ/161/285/table4CfA absorption line radial velocitiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date; JD-2400000.5dtime.epochdoubleRVelARadial velocity of component Akm/sphys.veloc;pos.heliocentricfloate_RVelAUncertainty in RVelAkm/sstat.errorfloatRVelB? Radial velocity of component Bkm/sphys.veloc;pos.heliocentricfloatnullablee_RVelB? Uncertainty in RVelBkm/sstat.errorfloatnullableRVelC? Radial Velocity of component Ckm/sphys.veloc;pos.heliocentricfloatnullablee_RVelC? Uncertainty in RVelCkm/sstat.errorfloatnullableBCphaseOrbital phase of components B and Ctime.phasefloatADBCphaseOrbital phase of components AD and BCtime.phasefloatJ/AJ/161/285/table13H{alpha} equivalent widthsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[49962/57584] Julian date; JD-2500000.5dtime.epochdoubleBCphase[0/1] Phase of B-C orbit; P=0.749daystime.phasefloatADBCphase[0/1] Phase of AD-BC orbit; P=988daystime.phasedoubleEWtot[-11.5/-3.7]? Total Equivalent Width (1)0.1nmspect.line.eqWidthfloatnullablee_EWtot[0.06/0.6] 1{sigma} uncertainty in EWtot0.1nmstat.errorfloatEWB[-1.65/-0.4]? Component B Equivalent Width (1)0.1nmspect.line.eqWidthfloatnullablee_EWB[0.03/0.3]? 1{sigma} uncertainty in EWB0.1nmstat.errorfloatnullableEW2[-5.7/-1.6] Component 2 Equivalent Width (1)0.1nmspect.line.eqWidthfloate_EW2[0.03/0.4] 1{sigma} uncertainty in EW20.1nmstat.errorfloatEW3[-5.8/-1.6] Component 3 Equivalent Width (1)0.1nmspect.line.eqWidthfloate_EW3[0.03/0.5] 1{sigma} uncertainty in EW30.1nmstat.errorfloatEWC[-2/-0.08]? Component C Equivalent Width (1)0.1nmspect.line.eqWidthfloatnullablee_EWC[0.03/0.3]? 1{sigma} uncertainty in EWC0.1nmstat.errorfloatnullableJ/AJ/161/285/table14Component B,C radial velocities from H{alpha}recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Date; JD-2500000.5dtime.epochdoubleBCphaseB-C phase; P=0.749 dtime.phasefloatADBCphaseAD-BC phase; P=988 dtime.phasedoubleRVelB2? Heliocenrtic Radial Velocity component B (1)km/sphys.veloc;pos.heliocentricfloatnullablee_RVelB2? The 1{sigma} uncertainty in RVelB2km/sstat.errorfloatnullableRVelC3? Heliocentric Radial Velocity component C (1)km/sphys.veloc;pos.heliocentricfloatnullablee_RVelC3? The 1{sigma} uncertainty in RVelC3km/sstat.errorfloatnullableJ/AJ/161/285/table15Component V2, V3 radial velocities from H{alpha}e_RVelB2? The 1{sigma} uncertainty in RVelB2km/sstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Date; JD-2500000.5dtime.epochdoubleBCphaseB-C phase; P=0.749 dtime.phasefloatADBCphaseAD-BC phase; P=988 dtime.phasedoubleRVelB2? Heliocenrtic Radial Velocity component B (1)km/sphys.veloc;pos.heliocentricfloatnullableRVelC3? Heliocentric Radial Velocity component C (1)km/sphys.veloc;pos.heliocentricfloatnullablee_RVelC3? The 1{sigma} uncertainty in RVelC3km/sstat.errorfloatnullableJ/AJ/161/285/table16HeI equivalent widthsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[49962/56230] Julian date; JD-2500000.5dtime.epochdoubleBCphase[0/1] B-C phase; P=0.749dtime.phasefloatADBCphase[0/1] AD-BC phase; P=988dtime.phasedoubleEWtot[-4.5/-0.4] Total Equivalent Width (1)0.1nmspect.line.eqWidthfloate_EWtot[0.02/0.3] 1{sigma} uncertainty in EWtot0.1nmstat.errorfloatEWB[-0.7/-0.1]? Component B Equivalent Width (1)0.1nmspect.line.eqWidthfloatnullablee_EWB[0.03/0.2]? 1{sigma} uncertainty in EWB0.1nmstat.errorfloatnullableEW2[-4.5/-0.2] Component 2 Equivalent Width (1)0.1nmspect.line.eqWidthfloate_EW2[0.02/0.2] 1{sigma} uncertainty in EW20.1nmstat.errorfloatEWC[-0.9/-0.1]? Component C Equivalent Width (1)0.1nmspect.line.eqWidthfloatnullablee_EWC[0.02/0.2]? 1{sigma} uncertainty in EWC0.1nmstat.errorfloatnullableJ/AJ/161/285/table17HeI emission line RVelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[49962/56230] Julian date; JD-2500000.5dtime.epochdoubleBCphase[0/1] B-C phase; P=0.749 dtime.phasefloatADBCphase[0/1] AD-BC phase; P=988 dtime.phasedoubleRVelB[-7.4/101]? HRV for component B (1)km/sphys.veloc;pos.heliocentricfloatnullablee_RVelB[0.9/12.7]? 1{sigma} uncertainty in RVelBkm/sstat.errorfloatnullableRVelcen[25/51] HRV for central component (1)km/sphys.veloc;pos.heliocentricfloate_RVelcen[0.2/8.6] 1{sigma} uncertainty in RVelcenkm/sstat.errorfloatRVelC[-35/95]? HRV for component C (1)km/sphys.veloc;pos.heliocentricfloatnullablee_RVelC[0.5/9]? 1{sigma} uncertainty in RVelCkm/sstat.errorfloatnullable