J/ApJ/839/52ivo://CDS.VizieR/J/ApJ/839/52doi:10.26093/cds/vizier.18390052CDSTraven G.Munari U.Dallaporta S.Zwitter T.2018-03-12T08:40:35Z2017-12-13T13:49:34ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinfrared-photometryvisible-astronomyphotometryradial-velocityThe orbit and physical parameters of the previously unsolved double-lined eclipsing binary Tyc 5227-1023-1, discovered during the search for RR Lyr variable candidate members of the Aquarius stream, are derived using high-resolution echelle spectroscopy and V,i' photometry. A synthetic spectral analysis of both components has been performed, yielding metallicity [M/H]=-0.63+/-0.11 for both stars and a temperature for the secondary that is in close agreement with the one from the orbital solution, while the temperature of the primary is determined from photometry (T_1_=6350K). The masses and radii (M_1_=0.96+/-0.02, M_2_=0.84+/-0.01M_{sun}_, R_1_=1.39+/-0.01, R_2_=0.98+/-0.01R_{sun}_) reveal that both stars have already slightly evolved away from the main-sequence band, having an age of about 7Gyr, and the results of the synthetic spectral analysis support the claim of corotation with the orbital motion. The radial velocity of the system is -60+/-2km/s, while its distance, computed from orbital parameters and the derived reddening E_B-V_=0.053, is 496+/-35pc. Even though Tyc 5227-1023-1 was initially treated as a possible member of the Aquarius stream, the results presented here disagree with reported values for this ancient structure and suggest a likely membership of the thick disk.2017ApJ...839...52Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/839/52CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/259 : The Tycho-2 Catalogue (Hog+ 2000)I/337 : Gaia DR1 (Gaia Collaboration, 2016)J/ApJ/521/682 : Binaries in the Praesepe and Coma clusters (Abt+, 1999)J/A+A/442/1127 : Library of 2500-10500{AA} synthetic sp. (Munari+, 2005)J/AJ/137/4186 : UBVRI standards around celestial equator (Landolt, 2009)J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/A+A/525/A2 : Eclipsing binaries in NGC6791 (Brogaard+, 2011)J/A+A/543/A106 : UBVRI photometry in NGC6791 (Brogaard+, 2012)J/other/NewA/27.1 : RR Lyrae candidates in Aqr halo stream (Munari+, 2014)J/AJ/148/81 : APASS BVgri photometry of RAVE stars. I. (Munari+, 2014)J/other/JAD/20.4 : 180 APASS variable stars in Aquarius (Munari+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/839/52https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/839/52http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/839/52https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/839/52https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/839/52http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/839/52GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.381800341673347e-19 3.921900021377621e-19InfraredOpticaldefaultJ/ApJ/839/52/table1CCD photometryPhaseOrbital Phasetime.phasefloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDObservation Heliocentric Julian Date, HJD-2456000dtime.epochdoubleVmag[11.9/12.5] Landolt's V magnitudemagphot.mag;em.opt.Vfloate_Vmag[0.002/0.03] Uncertainty in Vmagmagstat.error;phot.mag;em.opt.Vfloatimag[11.6/12.2] SDSS i' magnitudemagphot.mag;em.opt.Ifloate_imag[0.004/0.02] Uncertainty in imagmagstat.error;phot.mag;em.opt.IfloatJ/ApJ/839/52/table2Heliocentric radial velocities Tycho 5227-1023-1S/N[16/32] Spectrum signal-to-noisestat.snrintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpecSpectrum number, from Asiago echelle logmeta.idintRej[0/1] 1=Rejected from orbital solutionmeta.codeintHJDObservation Heliocentric Julian Date, HJD-2457000dtime.epochfloatPhaseOrbital Phasetime.phasefloatExp[1200/3600] Spectrum exposure timestime.duration;obs.exposureintHRV1[-73/75]? Heliocentric radial velocity, Star 1km/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV1[1/5]? Uncertainty in HRV1km/sstat.errorfloatnullableHRV2[-81/86]? Heliocentric radial velocity, Star 2km/sspect.dopplerVeloc;pos.heliocentricfloatnullablee_HRV2[1/12]? Uncertainty in HRV2km/sstat.errorfloatnullable