J/AJ/135/1757ivo://CDS.VizieR/J/AJ/135/1757doi:10.26093/cds/vizier.51351757CDSSandberg Lacy C.H.Torres G.Claret A.2017-06-13T11:08:28Z2010-12-10T10:55:37ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsdwarf-starsradial-velocityphotometryWe present 12,155 new differential photometric observations in the V filter made with the Undergraduate Research Studies in Astronomy and NF\Observatory WebScopes, as well as 33 radial velocities from spectroscopic observations of the detached, 4.04 day double-lined eclipsing binary star GX Gem. Absolute dimensions of the components are determined from these new, and also from previously published, data with high precision (less than 0.7% in the masses and radii) for the purpose of testing various aspects of theoretical modeling. We obtain 1.488+/-0.011 solar masses and 2.327+/-0.012 solar radii for the primary, and 1.467+/-0.010 solar masses and 2.238+/-0.012 solar radii for the secondary. The effective temperatures and interstellar reddening of the stars are accurately determined from the spectra, uvby{beta}, and UBV photometry: 6195+/-100K for the primary, 6165+/-100K for the secondary, corresponding to spectral types of F7 and F7 V, and 0.068mag for the color excess E(b-y). Spectral line widths give rotational velocities that are synchronous with the mean orbital motion in a circular orbit.2008AJ....135.1757Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/135/1757CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/135/1757https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/135/1757http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/135/1757https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/135/1757https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/135/1757http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/135/1757GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/AJ/135/1757/table1CfA radial velocities of GX GemrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian datedtime.epochdoubleRVARadial velocity of A componentkm/sspect.dopplerVelocfloatRVBRadial velocity of B componentkm/sphys.veloc;pos.heliocentricfloatsigmaAVelocity dispersion of A componentkm/sphys.veloc.dispersionfloatsigmaBVelocity dispersion of B componentkm/sphys.veloc.dispersionfloatPhasePhase (1)time.phasefloat