J/ApJ/753/149ivo://CDS.VizieR/J/ApJ/753/149doi:10.26093/cds/vizier.17530149CDSMorales-Calderon M.Stauffer J.R.Stassun K.G.Vrba F.J.Prato L.,Hillenbrand L.A.Terebey S.Covey K.R.Rebull L.M.Terndrup D.M.,Gutermuth R.Song I.Plavchan P.Carpenter J.M.Marchis F.,Garcia E.V.Margheim S.Luhman K.L.Angione J.Irwin J.M.2017-10-13T15:41:56Z2014-03-18T14:54:50ZCDS support team

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

cds-question@unistra.freclipsing-binary-starspre-main-sequence-starsstellar-spectral-typesinfrared-photometryEclipsing binaries (EBs) provide critical laboratories for empirically testing predictions of theoretical models of stellar structure and evolution. Pre-main-sequence (PMS) EBs are particularly valuable, both due to their rarity and the highly dynamic nature of PMS evolution, such that a dense grid of PMS EBs is required to properly calibrate theoretical PMS models. Analyzing multi-epoch, multi-color light curves for ~2400 candidate Orion Nebula Cluster (ONC) members from our Warm Spitzer Exploration Science Program YSOVAR, we have identified 12 stars whose light curves show eclipse features. Four of these 12 EBs are previously known. Supplementing our light curves with follow-up optical and near-infrared spectroscopy, we establish two of the candidates as likely field EBs lying behind the ONC. We confirm the remaining six candidate systems, however, as newly identified ONC PMS EBs. These systems increase the number of known PMS EBs by over 50% and include the highest mass ({theta}^1^ Ori E, for which we provide a complete set of well-determined parameters including component masses of 2.807 and 2.797M_{sun}_) and longest-period (ISOY J053505.71-052354.1, P~20 days) PMS EBs currently known. In two cases ({theta}^1^ Ori E and ISOY J053526.88-044730.7), enough photometric and spectroscopic data exist to attempt an orbit solution and derive the system parameters. For the remaining systems, we combine our data with literature information to provide a preliminary characterization sufficient to guide follow-up investigations of these rare, benchmark systems.2012ApJ...753..149Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/753/149CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/171 : Parenago Catalog of Stars in Orion Nebula (Parenago 1954)J/ApJS/207/10 : HST Treasury Program on the ONC (Robberto+, 2013)J/AJ/144/192 : Orion A & B Spitzer survey. I. YSO catalog (Megeath+, 2012)J/AJ/142/60 : Palomar Transient Factory Orion Project (Van Eyken+, 2011)J/ApJ/733/50 : MIR phot. monitoring of the ONC (Morales-Calderon+, 2011)J/AJ/139/950 : JHKs photometry in ONC (Robberto+, 2010)J/MNRAS/400/603 : New variables in ONC (Parihar+, 2009)J/A+A/508/1313 : Orion pre-main sequence RIJH light curves (Frasca+, 2009)J/ApJ/671/605 : NGC 2264 and ONC PMS stars in the infrared (Cieza+, 2007)J/AJ/128/787 : Chandra Orion flanking fields data (Ramirez+, 2004)J/AJ/121/3160 : JHK photometry near the Trapezium region (Carpenter+, 2001)J/AJ/121/1676 : ONC low-mass stars photometry (Rebull+, 2001)J/A+A/375/130 : New PMS spectroscopic binaries in Orion (Covino+ 2001)J/AJ/113/1733 : Orion Nebula Cluster population (Hillenbrand 1997)http://ysovar.ipac.caltech.edu/ : YSOVAR project home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/753/149https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/753/149http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/753/149https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/753/149https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/753/149http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/753/149GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/753/149/table1 (New eclipsing binary candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/753/149/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/753/149/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/753/149/table1?GETtext/xml+votable180.050000true83.7262917-4.90361110.0055555555555555566/21439 228052.483060040379131e-20 2.6706780932288093e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/753/149?format=asciiOpticalInfrareddefaultJ/ApJ/753/149/table1New eclipsing binary candidatesNameMost common name (1)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintISOYInitial Spitzer Orion YSO source name (JHHMMSS.ss+DDMMSS.s)meta.idcharn_Name[i] i=Probable field eclipsing binarymeta.notecharVmag[12.1/19.1]? V-band magnitudemagphot.mag;em.opt.Vfloatnullabler_Vmag[cd] Origin of Vmag (2)meta.ref;pos.framecharIcmag[11/15.7]? I_c_-band magnitudemagphot.mag;em.opt.Ifloatnullabler_Icmag[cd] Origin of Icmag (2)meta.ref;pos.framecharJmag[6.6/14.9]? J-band magnitude (3)magphot.mag;em.IR.JfloatnullableHmag[6.2/14.1] H-band magnitude (3)magphot.mag;em.IR.HfloatKsmag[6/13.8] Ks-band magnitude (3)magphot.mag;em.IR.Kfloat[3.6][6.9/13.6] 3.6um band magnitude (4)magphot.mag;em.IR.3-4umfloat[4.5][6.5/13.5] 4.5um band magnitude (4)magphot.mag;em.IR.4-8umfloat[5.8][6.1/13.2]? 5.8um band magnitude (4)magphot.flux.density;em.IR.4-8umfloatnullable[8.0][9.2/9.3]? 8.0um band magnitude (4)magphot.flux.density;em.IR.8-15umfloatnullableSpTMK spectral type from this work (unless flag)src.spTypecharr_SpT[cdg] Origin of SpT (2)meta.ref;pos.framecharPer[0.54/20.49]? Period from this workdtime.perioddoublenullableTIdentification of table with the observationsmeta.id;meta.datasetintnullableOCatCross-match within 3" with Orion catalogs (J/AJ/113/1733, and J/ApJ/733/50)meta.ref.urlintnullableLCPlot the light curvemeta.ref.urlcharTSGet the time seriesmeta.ref.urlchar2MDisplay the 2MASS data (Cutri et al. 2003, Cat. II/246) within 3"meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPosition, from ISOY name (right ascension part)degpos.eq.ra;meta.main_DEPosition, from ISOY name (declination part)degpos.eq.dec;meta.main