J/AJ/157/56ivo://CDS.VizieR/J/AJ/157/56doi:10.26093/cds/vizier.51570056CDSHorch E.P.Tokovinin A.Weiss S.A.Lobb J.Casetti-Dinescu D.I.,Granucci N.M.Hess N.M.Everett M.E.van Belle G.T.Winters J.G.,Nusdeo D.A.Henry T.J.Howell S.B.Teske J.K.Hirsch L.A.Scott N.J.,Matson R.A.Kane S.R.2019-07-24T12:09:28Z2019-05-31T12:32:00ZCDS support team

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

cds-question@unistra.frmultiple-starsphotometryvisible-astronomyinterferometryWe present 248 speckle observations of 43 binary and 19 trinary star systems chosen to make progress in two main areas of investigation: the fundamental properties of metal-poor stars and star formation mechanisms. The observations were taken at the Gemini North and South telescopes during the period 2015 July to 2018 April, mainly with the Differential Speckle Survey Instrument but also with a few early results from the new 'Alopeke speckle camera at Gemini North. We find that the astrometry and photometry of these observations as a whole are consistent with previous work at Gemini. We present five new visual orbits for systems important in understanding metal-poor stars, three of which have orbital periods of less than 4 yr, and we indicate the degree to which these and future observations can impact our knowledge of stellar properties and star formation. In particular, we find a decrease in mass at fixed spectral type for metal-poor stars versus their solar-metallicity analogs that is consistent with predictions that are made from current stellar models.2019AJ....157...56Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/157/56CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/239 : The Hipparcos and Tycho Catalogues (ESA 1997)B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)J/AJ/127/1727 : Differential magnitudes of binary stars (Horch+, 2004)J/other/AstBu/63.278 : Metal-poor stars speckle interferometryJ/AJ/141/45 : Speckle observations of HIP stars (Horch+, 2011)J/AJ/150/151 : DSSI observations of binaries. VI. Measures in 2014J/AJ/153/212 : Observations of binary stars at the WIYN telescopehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/157/56https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/157/56http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/157/56https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/157/56https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/157/56http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/157/56GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/157/56/table2 (Binary star speckle measures)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/157/56/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/157/56/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/157/56/table2?GETtext/xml+votable180.050000true15.277083316.37263890.0055555555555555566/1262 2381 2923 6693 8255 8493 9503 12295 13634 14084 14232 15132 19215 19784 19827 20268 21901 22476 22762 23431 24625 24735 24848 25113 28760 28882 29091 29092 29299 29439 29807 30048 30109 30264 30859 30910 30939 31048 31133 31265 31390 31501 31760 36742 37120 38259 39008 41465 41786 42171 42216 42758 43013 43902 44281 44378 44585 44833 45602 45664 47855 48767https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/157/56?format=asciiOpticaldefaultJ/AJ/157/56/table2Binary star speckle measuresSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWDSWashington Double Star designation (HHMMm+DDMM, J2000)meta.id;meta.maincharDiscDiscoverer designationmeta.idcharCompComponents designationmeta.code.multipcharONameOther designationmeta.idcharHIPHipparcos catalogue numbermeta.record;phys.atmol.number;meta.tablecharDate[14.5637/18.2525] Besselian date of the observation (offset 2000)yrtime.epoch;obsfloatPA[1/355.9]? Position angle of the secondary star relative to the primarydegpos.posAngfloatnullablef_PAFlag on PA (1)meta.codecharSep[0.0067/1.4154]? Separation of the two starsarcsecpos.angDistancefloatnullablel_Dmag[<>] Limit flag on Dmagmeta.code.error;arith.diffcharDmag[-0.55/7.74]? Magnitude differencemagphot.mag;arith.difffloatnullablef_Dmag[acde] Flag on Dmag (2)meta.codecharlambda[562/880] Center wavelength of the filter usednmem.wl;instr.filterintFWHM[40/50] Full width at half maximum of the filter transmissionnmspect.line.widthint_RAPositions from WDS catalog (cat. B/wds) or Simbad (right ascension part)degpos.eq.ra;meta.main_DEPositions from WDS catalog (cat. B/wds) or Simbad (declination part)degpos.eq.dec;meta.main