J/AJ/161/106ivo://CDS.VizieR/J/AJ/161/106doi:10.26093/cds/vizier.51610106CDSBowler B.P.Cochran W.D.Endl M.Franson K.Brandt T.D.Dupuy T.J.,MacQueen P.J.Kratter K.M.Mawet D.Ruane G.2021-07-05T12:48:44Z2021-04-30T08:49:57ZCDS support team

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

cds-question@unistra.frg-starsdwarf-starsmultiple-starsradial-velocityvisible-astronomyspectroscopyWe present the discovery of a white dwarf companion to the G1 V star 12Psc found as part of a Keck adaptive optics imaging survey of long-term accelerating stars from the McDonald Observatory Planet Search Program. Twenty years of precise radial-velocity monitoring of 12Psc with the Tull Spectrograph at the Harlan J. Smith telescope reveals a moderate radial acceleration (~10m/s/yr), which together with relative astrometry from Keck/NIRC2 and the astrometric acceleration between Hipparcos and Gaia DR2 yields a dynamical mass of M_B_=0.605_-0.022_^+0.021^M{sun} for 12PscB, a semimajor axis of 40_-4_^+2^au, and an eccentricity of 0.84{+/-}0.08. We also report an updated orbital fit of the white dwarf companion to the metal-poor (but barium-rich) G9 V dwarf HD159062 based on new radial velocity observations from the High-Resolution Spectrograph at the Hobby-Eberly Telescope and astrometry from Keck/NIRC2. A joint fit of the available relative astrometry, radial velocities, and tangential astrometric acceleration yields a dynamical mass of M_B_=0.609_-0.011_^+0.010^M{sun} for HD159062B, a semimajor axis of 60_-7_^+5^au, and preference for circular orbits (e<0.42 at 95% confidence). 12PscB and HD159062B join a small list of resolved Sirius-like benchmark white dwarfs with precise dynamical mass measurements which serve as valuable tests of white dwarf mass-radius cooling models and probes of AGB wind accretion onto their main-sequence companions.2021AJ....161..106Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/161/106CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/230 : TASS Mark III photometric survey (Richmond+, 2000)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/AJ/126/2048 : NStars project: the Northern Sample. I. (Gray+, 2003)J/ApJS/156/47 : DA white dwarfs from the Palomar Green Survey (Liebert+, 2005)J/AJ/131/431 : Abundances of Galactic G dwarfs (Brewer+, 2006)J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)J/ApJ/725/331 : Astrometry in the Galactic Center (Yelda+, 2010)J/ApJ/743/138 : Spectroscopic survey of bright white dwarfs (Gianninas+, 2011)J/ApJS/201/19 : Hawaii Infrared Parallax Program. I. (Dupuy+, 2012)J/A+A/537/A146 : Stellar models with rot. 0.8<M<120, Z=0.014 (Ekstrom+, 2012)J/A+A/552/A27 : Stellar activity and kinematics of FGK stars (Murgas+, 2013)J/A+A/556/A150 : SWEETCat I. Stellar parameters for host stars (Santos+, 2013)J/ApJS/210/5 : The twenty-five year Lick planet search (Fischer+, 2014)J/MNRAS/444/3517 : BCool survey of solar-type stars (Marsden+ 2014)J/ApJS/216/7 : Planets Around Low-Mass Stars (PALMS). IV. (Bowler+, 2015)J/ApJ/810/158 : M,L,T dwarfs fundamental parameters & SEDs (Filippazzo+, 2015)J/ApJS/225/32 : Extended abundance analysis of cool stars (Brewer+, 2016)J/ApJ/818/34 : Radial velocity monitoring of 5 FGK stars (Endl+, 2016)J/ApJ/840/70 : Historical and HST Astrometry of Sirius A,B (Bond+, 2017)J/AJ/153/208 : LCES HIRES/Keck RVel Exoplanet Survey (Butler+, 2017)J/A+A/606/A94 : Chemical abundances of 1059 FGK stars (Delgado Mena+, 2017)J/ApJS/231/15 : Astrometric monitoring of ultracool dwarf bin. (Dupuy+, 2017)J/AJ/153/21 : Abundances in local region.II. F, G, & K dwarfs (Luck+, 2017)J/AJ/154/200 : The nearby white dwarf/red dwarf pair 40 Eri BC (Mason+, 2017)J/A+A/604/A108 : UniDAM results (Mints+, 2017)J/A+A/614/A55 : Lithium abundance in dwarfs & subgiants (Aguilera-Gomez+,2018)J/AJ/155/159 : RVs of the late-T dwarf GL 758 B host star (Bowler+, 2018)J/A+A/616/A108 : Cool stars chromospheric activity catalog (Boro Saikia+, 2018)J/A+A/615/A76 : Spectroscopic parameters of stars (SPECIES). I. (Soto+, 2018)J/A+A/626/A128 : Main-sequence and subgiant Barium stars (Escorza+, 2019)J/ApJ/871/63 : How to constrain M dwarf. II. Nearby binaries (Mann+, 2019)J/A+A/639/A47 : SPHERE and NaCo images of HD 19467B (Maire+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/161/106https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/161/106http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/161/106https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/161/106https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/161/106http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/161/106GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/161/106/table2Full Spectrograph Relative Radial Velocities of 12 PscrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[2452115/2459073] Barycentric Julian Datedtime.epochdoubleRVel[-98.9/119] Radial velocitym/sphys.veloc;pos.heliocentricfloate_RVel[3.6/8.5] Uncertainty in RVelm/sstat.error;phys.velocfloatJ/AJ/161/106/table3HRS Relative Radial Velocities of HD 159062recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[2454698/2456507] Barycentric Julian Datedtime.epochdoubleRVel[-31/47.9] Radial velocitym/sphys.veloc;pos.heliocentricfloate_RVel[2.3/8.9] Uncertainty in RVelm/sstat.error;phys.velocfloat