J/AJ/151/90ivo://CDS.VizieR/J/AJ/151/90doi:10.26093/cds/vizier.51510090CDSArulanantham N.A.Herbst W.Cody A.M.Stauffer J.R.Rebull L.M.,Agol E.Windemuth D.Marengo M.Winn J.N.Hamilton C.M.Mundt R.,Johns-Krull C.M.Gutermuth R.A.2017-06-22T14:28:42Z2016-07-25T16:15:52ZCDS support team

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

cds-question@unistra.fropen-star-clustersvariable-starsinfrared-photometryvisible-astronomybroad-band-photometryWe examine the light and color evolution of the T Tauri binary KH 15D through photometry obtained at wavelengths between 0.55 and 8.0{mu}m. The data were collected with A Novel Dual Imaging CAMera (ANDICAM) on the 1.3m SMARTS telescope at Cerro-Tololo Inter-American Observatory and with InfraRed Array Camera on the Spitzer Space Telescope. We show that the system's circumbinary ring, which acts as a screen that covers and uncovers different portions of the binary orbit as the ring precesses, has reached an orientation where the brighter component (star B) fully or nearly fully emerges during each orbital cycle. The fainter component (star A) remains fully occulted by the screen at all phases. The leading and trailing edges of the screen move across the sky at the same rate of ~15m/s, consistent with expectation for a ring with a radius and width of ~4 au and a precession period of ~6500 years. Light and color variations continue to indicate that the screen is sharp edged and opaque at VRIJH wavelengths. However, we find an increasing transparency of the ring edge at 2.2, 3.6, and 4.5{mu}m. Reddening seen at the beginning of the eclipse that occurred during the CSI 2264 campaign particularly suggests selective extinction by a population of large dust grains. Meanwhile, the gradual bluing observed while star B is setting is indicative of forward scattering effects at the edge of the ring. The spectral energy distribution of the system at its bright phase shows no evidence of infrared excess emission that can be attributed to radiation from the ring or other dust component out to 8{mu}m.2016AJ....151...90Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/151/90CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)J/AJ/147/9 : VRIJHK light curves of V582 Mon (Windemuth+, 2014)J/AJ/140/2025 : KH 15D (V582 Mon) VI light curves (Herbst+, 2010)J/AJ/114/2644 : UBVRIHa photometry of NGC2264 (Sung+, 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/151/90https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/151/90http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/151/90https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/151/90https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/151/90http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/151/90GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.0616683193919197e-20 6.185923063528282e-20OpticalInfrareddefaultJ/AJ/151/90/table3Spitzer photometry of KH 15DrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDObservation Julian Datedtime.epochdouble[3.6][12.5/18.91]? Spitzer/IRAC 3.6{mu}m band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6][0.06/1.5]? Uncertainty in [3.6]magstat.errorfloatnullable[4.5][11.8/22.3]? Spitzer/IRAC 4.5{mu}m band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5][0.07/6.6]? Uncertainty in [4.5]magstat.errorfloatnullable[5.8][12.3/15.5]? Spitzer/IRAC 5.8{mu}m band magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8][0.09/0.37]? Uncertainty in [5.8]magstat.errorfloatnullable[8.0][11.8/14.5]? Spitzer/IRAC 8.0{mu}m band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0][0.127/0.427]? Uncertainty in [8.0]magstat.errorfloatnullableJ/AJ/151/90/table1VRIJHK photometry of KH 15DrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDObservation Julian Datedtime.epochdoubleVmag[15.4/21.8]? V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag[0/1.16]? Uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatnullableRmag[14.7/19.4]? R band magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag[0.003/0.29]? Uncertainty in Rmagmagstat.error;phot.mag;em.opt.RfloatnullableImag[14/19.8]? I band magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag[0.001/1.1]? Uncertainty in Imagmagstat.error;phot.mag;em.opt.IfloatnullableJmag[13.2/18.4]? J band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0/0.31]? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag[12.5/20]? H band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag[0/0.22]? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag[12.3/19.7]? K band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag[0.01/5.96]? Uncertainty in Kmagmagstat.error;phot.mag;em.IR.KfloatnullableObsObservatory and/or instrument (IRSF, ESO, CTIO, KAIT, KONK, KPNO, MMO, TEN, TENE, USNO, UZBK, VVO, or WISE) (1)meta.id;instr.obstycharRefPaper reference to original data (H05, H10, K05, W13, or A16) (2)meta.bibchar