J/AJ/165/6ivo://CDS.VizieR/J/AJ/165/6doi:10.26093/cds/vizier.51650006CDSSandquist E.L.Buckner A.J.Shetrone M.D.Barden S.C.,Pilachowski C.A.Deliyannis C.P.Harmer D.Mathieu R.Meibom S.,Frandsen S.,Orosz J.A.2023-10-30T13:45:24Z2023-05-12T12:50:38ZCDS support team

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

cds-question@unistra.fropen-star-clustersmultiple-starsvisible-astronomyspectroscopyinfrared-photometrybroad-band-photometryradial-velocityWe present analyses of improved photometric and spectroscopic observations for two detached eclipsing binaries at the turnoff of the open cluster NGC752: the 1.01days binary DSAnd and the 15.53days BD+37410. For DSAnd, we find M1=1.692{+/-}0.004{+/-}0.010M{sun}, R1=2.185{+/-}0.004{+/-}0.008R{sun}, M2=1.184 {+/-}0.001{+/-}0.003M{sun}, and R2=1.200{+/-}0.003{+/-}0.005R{sun}. We either confirm or newly identify unusual characteristics of both stars in the binary: the primary star is found to be slightly hotter than the main-sequence turnoff and there is a more substantial discrepancy in its luminosity compared to models (model luminosities are too large by about 40%), while the secondary star is oversized and cooler compared to other main-sequence stars in the same cluster. The evidence points to nonstandard evolution for both stars, but most plausible paths cannot explain the low luminosity of the primary star. BD+37410 only has one eclipse per cycle, but extensive spectroscopic observations and the Transiting Exoplanet Survey Satellite light curve constrain the stellar masses well: M1=1.717{+/-}0.011M{sun} and M2=1.175{+/-}0.005M{sun}. The radius of the main-sequence primary star near 2.9R{sun} definitively requires large convective core overshooting (>0.2 pressure scale heights) in models for its mass, and multiple lines of evidence point toward an age of 1.61{+/-}0.03{+/-}0.05Gyr (statistical and systematic uncertainties). Because NGC752 is currently undergoing the transition from nondegenerate to degenerate He ignition of its red clump stars, BD+37410A directly constrains the star mass where this transition occurs.2023AJ....165....6Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/165/6CatalogResearchIsServedByTAP VizieR generic servicerelated-toII/215 : uvby-beta Catalogue (Hauck+ 1997)I/259 : The Tycho-2 Catalogue (Hog+ 2000)II/287 : Northern Sky Variability Survey (NSVS) (Wozniak+, 2004)II/271 : TASS Mark IV patches photometric catalog, version 2 (Droege+, 2007)IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)I/352 : Distances to 1.47 billion stars in Gaia EDR3 (Bailer-Jones+, 2021)VI/120 : High-resolution synthetic stellar library (Coelho+, 2005)VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)V/152 : The DEBCat detached eclipsing binary catalogue (Southworth, 2015)VI/96 : Evolutionary Sequences (Fagotto+ 1993-96)J/PASP/106/281 : Photometry and radial velocities in NGC752 (Daniel+, 1994)J/A+A/324/137 : Eclipsing binaries with candidate CP stars (North+ 1997)J/A+A/333/231 : O-M stars model atmospheres (Bessell+ 1998)J/A+A/339/423 : Velocities of red giants in NGC 752 (Mermilliod+ 1998)J/AJ/128/1319 : New AY Cam Photometric Observations (Williamon+, 2004)J/ApJ/640/1018 : Differential photometry of V1061 Cyg (Torres+, 2006)J/ApJS/176/262 : VRI photometry & theta values in open clusters (Taylor+, 2008)J/A+A/502/253 : V636 Cen radial velocities curves (Clausen+, 2009)J/A+A/498/949 : Velocities 1253 F-K dwarfs open clusters (Mermilliod+, 2009)J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010)J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)J/BaltA/19/35 : NGC 752 Vilnius photometry (Zdanavicius+, 2010)J/A+A/535/A30 : Chemical abundance 12 stars in open clusters (Carrera+, 2011)J/A+A/535/A3 : SuperWASP observations of pulsating Am stars (Smalley+, 2011)J/MNRAS/419/1350 : Red giants abundances in 4 open clusters (Reddy+, 2012)J/A+A/537/A117 : Velocity curves of SW CMa and HW CMa (Torres+, 2012)J/A+A/552/A16 : Limb-darkening for CoRoT, Kepler, Spitzer. II. (Claret+, 2013)J/MNRAS/446/3562 : Abundances of red giants in NGC752 (Bocek Topcu+, 2015)J/AJ/150/154 : Photometry and spectroscopy of V501 Mon (Torres+, 2015)J/AJ/150/134 : uvbyCaH{beta} photometry of NGC 752 (Twarog+, 2015)J/ApJ/831/11 : KIC9777062 RVs & asteroseismology NGC6811 (Sandquist+, 2016)J/ApJ/838/25 : Hectochelle spectroscopy for 776 Kepler stars (Guo+, 2017)J/ApJ/862/33 : Improved & expanded membership cat. NGC752 (Agueros+, 2018)J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way (Cantat-Gaudin+, 2018)J/ApJS/237/28 : WISE catalog of periodic variable stars (Chen+, 2018)J/A+A/618/A20 : Limb-darkening for TESS, Kepler, Corot, MOST (Claret, 2018)J/A+A/616/A10 : 46 open clusters GaiaDR2 HR diagram (Gaia Collaboration, 2018)J/AJ/156/102 : TESS Input Catalog and Candidate Target List (Stassun+, 2018)J/AJ/158/163 : Li abundance values for stars in NGC 6819 (Deliyannis+, 2019)J/ApJ/878/99 : Abundances of dwarfs & giants NGC752 with HIRES (Lum+, 2019)J/AJ/158/82 : DS Andromedae radial velocity & photometry (Milone+, 2019)J/AJ/158/35 : Swift UVOT Stars III. Galactic open clusters (Siegel+, 2019)J/ApJS/249/22 : Radial velocity variable stars from LAMOST DR4 (Tian+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/165/6https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/165/6http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/165/6https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/165/6https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/165/6http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/165/6GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfrareddefaultJ/AJ/165/6/table3Time-series photometry used in modeling DS AndrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[39748/59099] Barycentric Julian Date, BJD-2400000.0time.epochdoubleFiltFilter used; B, Ic, Rc, TESS, U, V, W1 or W2instr.setupcharomag[-0.11/12.4] Observed magnitude in Filtermagphot.magfloate_omag[0.003/0.07] Uncertainty in omagmagstat.error;phot.magfloatJ/AJ/165/6/table9Radial velocity measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar name; BD+37 140 or DS Andmeta.id;meta.maincharObsObservatory (1)meta.id;instr.obstycharBJD[44165/56587] Barycentric Julian Date, BJD-2400000.0dtime.epochdoubleFlag[b] Fit flag, b=not used in fitmeta.code;stat.fitcharRVelA[-119/129]? Component A radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVelA[0.04/5]? Uncertainty in RVel-Akm/sstat.errorfloatnullableRVelB[-174/183]? Component B radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVelB[0.1/4]? Uncertainty in RVel-Bkm/sstat.errorfloatnullableRVelC[3.48/7.96]? Component C radial velocitykm/sphys.veloc;pos.heliocentricfloatnullablee_RVelC[0.1/0.5]? Uncertainty in RVel-Ckm/sstat.errorfloatnullable