J/A+A/580/A21ivo://CDS.VizieR/J/A+A/580/A21doi:10.26093/cds/vizier.35800021CDSTal-Or L.Faigler S.Mazeh T.2017-12-15T10:56:03Z2015-07-22T09:32:14ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starseclipsing-binary-starsThe BEER algorithm, introduced by Faigler & Mazeh (2011MNRAS.415.3921F), searches stellar lightcurves for the BEaming, Ellipsoidal, and Reflection (BEER) photometric modulations that are caused by a short-period companion. These three effects are typically of very low amplitude, and can mainly be detected in lightcurves from space-based photometers. Unlike eclipsing binaries, these effects are not limited to edge-on inclinations. Applying the algorithm to wide-field photometric surveys such as CoRoT and Kepler offers an opportunity to better understand the statistical properties of short-period binaries. It also widens the window for detecting intrinsically rare systems, like short-period brown-dwarf and massive- planetary companions to main-sequence stars. Applying the search to the first five long-run center CoRoT fields, we identified 481 non-eclipsing candidates with periodic flux amplitudes of 0.5-87mmag. Optimizing the Anglo-Australian-Telescope pointing coordinates and the AAOmega fiber-allocations with dedicated softwares, we acquired 6-7 medium-resolution spectra of 281 candidates in a seven-night campaign. Analysis of the red-arm AAOmega spectra, which covered the range of 8342-8842{AA}, yielded a radial-velocity precision of ~1 km/s. Spectra containing lines of more than one star were analyzed with the two- dimensional correlation algorithm TODCOR. The measured radial velocities confirmed the binarity of seventy of the BEER candidates, 45 single-line binaries, 18 double-line binaries, and 7 diluted binaries. We show that red giants introduce a major source of false candidates and demonstrate a way to improve BEER's performance in extracting higher fidelity samples from future searches of CoRoT lightcurves. The periods of the confirmed binaries span a range of 0.3-10days and show a rise in the number of binaries per logP bin toward longer periods. The estimated mass ratios of the double-line binaries and the mass ratios assigned to the single-line binaries, assuming an isotropic inclination distribution, span a range of 0.03-1. On the low-mass end we have detected two brown-dwarf candidates on a ~1day period orbit. This is the first time non-eclipsing beaming binaries are detected in CoRoT data, and we estimate that ~300 such binaries can be detected in the CoRoT long-run lightcurves.2015A&A...580A..21Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/580/A21CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/corot : CoRoT observation log Release 13 (CoRoT, 2009-2014)J/A+A/479/865 : CoRoT exoplanet candidates (Loeillet+, 2008)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/580/A21https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/580/A21http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/580/A21https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/580/A21https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/580/A21http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/580/A21GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/580/A21/table2 (Coordinates and photometric parameters of the BEER candidates observed at AAOmega)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/580/A21/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/580/A21/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/580/A21/table2?GETtext/xml+votable180.050000true290.77091.24760.005555555555555556Cone search capability for table J/A+A/580/A21/table4 (Template parameters of the non-composite spectrum candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/580/A21/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/580/A21/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/580/A21/table4?GETtext/xml+votable180.050000true290.770951.247560.0055555555555555565/7560 7609 7956 6/29557 29559 30293 30295 30301 30414 30433 30450-30451 30456-30458 30466 30472-30473 31830 31833https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/580/A21?format=asciidefaultJ/A+A/580/A21/table2Coordinates and photometric parameters of the BEER candidates observed at AAOmegaCoRoTCoRoT IDmeta.id;meta.mainlongprimaryT0Orbital phase (HJD)dtime.phasedoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCSimbad column added by the CDSmeta.notecharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmag[12.4/17.1] Magnitude in V filtermagphot.mag;em.opt.VfloatP[0.07/17] Orbital perioddtime.perioddoublee_POrbital period uncertaintydstat.errordoublee_T0Orbital phase uncertaintydstat.errorfloatAell[-86963/-94] Ellipsoidal amplitude (in 10^-6^)(10-6)src.var.amplitudedoublee_Aell[3/2024] Ellipsoidal amplitude uncertainty(10-6)stat.errorfloatAbeam[-16/11552] Beaming amplitude (in 10^-6^)(10-6)src.var.amplitudefloate_Abeam[5/4728] Beaming amplitude uncertainty(10-6)stat.errorfloatAref[-18809/9718] Reflection amplitude (in 10^-6^)(10-6)src.var.amplitudedoublee_Aref[7/3692] Reflection amplitude uncertainty(10-6)stat.errorfloatConf[0/1] Confirmation flag: 0=false alarm, 1=confirmed BEER binarymeta.code.errorintSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/580/A21/table4Template parameters of the non-composite spectrum candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCoRoTCoRoT IDmeta.id;meta.mainlongTeff[4800/9200] Effective temperatureKphys.temperature.effectiveintlogg[2.5/5.5] Surface gravitylog(cm.s**-1)phys.gravityfloat[m/H][-1.5/0.5] Metallicitylog(Sun)phys.abund.Zfloatrot[1/188] Projected rotational broadening of the lineskm/sspect.line.widthintConf[0/1] Confirmation flag: 0=false alarm, 1=confirmed BEER binarymeta.code.errorint_RARight Ascension (J2000) from B/corot/Faint_stardegpos.eq.ra;meta.main_DEDeclination (J2000) from B/corot/Faint_stardegpos.eq.dec;meta.mainJ/A+A/580/A21/table5Template parameters of the composite spectrum candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCoRoTCoRoT IDmeta.id;meta.mainlongTeff1[5000/8200] Primary effective temperatureKphys.temperature.effectiveintlogg1[3/5] Primary surface gravitylog(cm.s**-2)phys.gravityfloat[m/H]1[0/0.5] Primary metallicitylog(Sun)phys.abund.Zfloatrot1[1/151] Primary projected rotational broadening of the lineskm/sspect.line.widthintTeff2[4700/6600] Secondary effective temperatureKphys.temperature.effectiveintlogg2[4/4.5] Secondary surface gravitylog(cm.s**-2)phys.gravityfloat[m/H]2[0/0.5] Secondary metallicitylog(Sun)phys.abund.Zfloatrot2[5/131] Secondary projected rotational broadening of the lineskm/sspect.line.widthintalpha[0/1] Flux ratio (B/A) in AAOmega red-arm spectraphot.flux;arith.ratiofloat