J/ApJ/823/58ivo://CDS.VizieR/J/ApJ/823/58doi:10.26093/cds/vizier.18230058CDSMeng H.Y.A.Plavchan P.Rieke G.H.Cody A.M.Guth T.Stauffer J.,Covey K.Carey S.Ciardi D.Duran-Rojas M.C.Gutermuth R.A.,Morales-Calderon M.Rebull L.M.Watson A.M.2017-12-05T05:10:15Z2016-09-21T08:39:11ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsinfrared-photometryTheoretical models and spectroscopic observations of newborn stars suggest that protoplanetary disks have an inner "wall" at a distance set by the disk interaction with the star. Around T Tauri stars, the size of this disk hole is expected to be on a 0.1au scale that is unresolved by current adaptive optics imaging, though some model-dependent constraints have been obtained by near-infrared interferometry. Here we report the first measurement of the inner disk wall around a solar-mass young stellar object, YLW 16B in the {rho} Ophiuchi star-forming region, by detecting the light-travel time of the variable radiation from the stellar surface to the disk. Consistent time lags were detected on two nights, when the time series in H (1.6{mu}m) and K (2.2{mu}m) bands were synchronized while the 4.5{mu}m emission lagged by 74.5+/-3.2s. Considering the nearly edge-on geometry of the disk, the inner rim should be 0.084au from the protostar on average, with an error of order 0.01au. This size is likely larger than the range of magnetospheric truncations and consistent with an optically and geometrically thick disk front at the dust sublimation radius at ~1500K. The widths of the cross-correlation functions between the data in different wavebands place possible new constraints on the geometry of the disk.2016ApJ...823...58Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/823/58CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)II/297 : AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010)J/A+A/581/A30 : Herschel maps of {rho} Oph (Rebollido+, 2015)J/AJ/148/122 : YSOVAR: infrared photometry in Lynds 1688 (Gunther+, 2014)J/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)J/ApJS/211/3 : NIR photometry variability in {rho} Oph (Parks+, 2014)J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)J/AJ/145/59 : Optical and MIR photometry of PTF 10nvg (Hillenbrand+, 2013)J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/A+A/498/167 : Embedded sources in L 1688 (van Kempen+, 2009)J/A+A/485/155 : HK photometry of rho Oph PMS stars (Alves de Oliveira+, 2008)J/A+A/469/575 : Spitzer mid-IR spectra of 3 molecular clouds (Berne+, 2007)J/ApJ/646/297 : Spitzer obs. of pre-main-sequence stars (Rebull+, 2006)J/A+A/452/245 : Near-IR photometry of PMS stars in rho Oph (Natta+, 2006)J/ApJ/630/381 : Mid-IR imaging in {rho} Oph (Barsony+, 2005)J/AJ/130/1145 : YSO near-infrared properties (Doppmann+, 2005)J/ApJ/566/993 : rho Oph (Lynds 1688) cluster NICMOS imaging (Allen+, 2002)J/A+A/359/113 : X-ray and IR study of Rho Oph dark cloud (Grosso+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/823/58https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/823/58http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/823/58https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/823/58https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/823/58http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/823/58GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/823/58/table1 (Index of the sources monitored in the reverberation experiment)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/823/58/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/823/58/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/823/58/table1?GETtext/xml+votable180.050000true246.8313-24.694553060.0055555555555555566/42981https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/823/58?format=asciiInfrareddefaultJ/ApJ/823/58/table1Index of the sources monitored in the reverberation experimentSimbadNameSimbad column added by the CDSmeta.idcharLCInteractive plot of differential magnitudesmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqIndex of monitored sourcemeta.id;meta.mainintprimaryNpNumber of photometric measurements for this starmeta.numberintnullableRAJ2000[246.8/247] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-24.73/-24.6] Declination (J2000)degpos.eq.dec;meta.mainYLWYLW identifier (Young+ 1986ApJ...304L..45Y)meta.idcharIRS? IRS identifier (Wilking+, 1989ApJ...340..823W; <WLY 2-NN> in Simbad)meta.idintnullableISO-Oph? Iso-Oph identifier (Bontemps+, 2001, J/A+A/372/173)meta.idintnullable[GY92]? GY identifier (Greene & Young, 1992ApJ...395..516G)meta.idintnullable2MASS2MASS identifier (HHMMSSss+DDMMSSs; J2000)meta.idchar2MDisplay the 2MASS data (Cutri+ 2003, Cat. II/246) within 2"meta.ref.urlcharJ/ApJ/823/58/table2Differential photometry of all sources monitored in the reverberation experimentrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqIndex of monitored source, as in Table 1meta.id;meta.mainintInst[ACFS] Instrument used to monitor source (1)instr.setupcharDay[1/3] Observation run day (2)dobs.param;obsintBJDBarycentric Julian Date (TDB) in seconds (3)stime.epochdoubledNIRmag[-4.1/11.6] Differential NIR magnitude (4)magphot.mag;em.IR.NIR;arith.difffloate_dNIRmag[0.001/48]? Uncertainty in dNIRmag (4)magstat.error;phot.magfloatnullable