J/ApJ/877/29ivo://CDS.VizieR/J/ApJ/877/29doi:10.26093/cds/vizier.18770029CDSMuzerolle J.Flaherty K.Balog Z.Beck T.Gutermuth R.2021-02-19T07:34:05Z2020-12-15T07:29:58ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starspre-main-sequence-starsinfrared-photometryvisible-astronomybroad-band-photometryWe present multiepoch optical and near-infrared (NIR) photometry and spectroscopy of the spectroscopic binary T Tauri star DQ Tau. The photometric monitoring, obtained using SMARTS ANDICAM, recovers the previously seen correlation between optical flux and the 15.8d binary orbital period, with blue flux peaks occurring close to most observed periastron passages. For the first time, we find an even more consistent correlation between orbital period and NIR brightness and color. The onset of pulse events in the NIR precedes those in the optical by a few days, on average, with the rise usually starting near apastron orbital phase. We further obtained five epochs of spectroscopy using Infrared Telescope Facility (IRTF) SpeX, with a wavelength range of 0.8-5{mu}m, and derived spectra of the infrared excess emission. The shape and strength of the excess varies with time, with cooler and weaker characteristic dust emission (T~1100-1300K) over most of the binary orbit, and stronger/warmer dust emission (T~1600K, indicative of dust sublimation) just before periastron passage. We suggest that our results are broadly consistent with predictions of simulations of disk structure and accretion flows around close binaries, with the varying dust emission possibly tracing the evolution of accretion streams falling inward through a circumbinary disk cavity and feeding the accretion pulses traced by the optical photometry and NIR emission lines. However, our results also show more complicated behavior that is not fully explained by this simple picture, and will require further observations and modeling to fully interpret.2019ApJ...877...29Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/877/29CatalogResearchIsServedByTAP VizieR generic servicerelated-toI/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer- Jones+, 2018)J/ApJS/101/117 : UBVRIJHKLMNQ photometry in Taurus-Auriga (Kenyon+ 1995)J/AJ/118/1043 : Herbig Ae/Be stars catalog (Herbst+, 1999)J/ApJ/704/531 : The coevality of young binary systems (Kraus+, 2009)J/ApJS/186/111 : Spitzer observations of Taurus members (Luhman+, 2010)J/ApJ/751/115 : Millimeter emission from Taurus binary systems (Harris+, 2012)J/other/Nat/493.378 : LRL 54361 Spitzer light curves (Muzerolle+, 2013)J/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)J/ApJ/784/126 : IR photometry of all known members in Taurus (Esplin+, 2014)J/ApJ/786/97 : Photospheric properties of T Tauri stars (Herczeg+, 2014)J/ApJ/811/131 : UBV light curves of DQ Tau and UZ Tau E (Ardila+, 2015)J/A+A/594/A59 : Far-IR lines in YSOs Herschel-PACS (Riviere-Marichalar+, 2016)J/AJ/151/146 : IRS spectra with features of silicates (Chen+, 2016)J/ApJ/835/8 : UBVR phot. of the T Tauri binary DQ Tau (Tofflemire+, 2017)J/AJ/153/46 : Spectroscopy of candidate members in Taurus (Luhman+, 2017)J/AJ/156/271 : The stellar membership of the Taurus SFR (Luhman, 2018)J/A+A/619/A32 : CARMENES SB2 orbital parameters (Baroch+, 2018)J/A+A/630/A137 : Structure and kinematics of the Taurus region (Galli+, 2019)J/A+A/638/A85 : 3D view of Taurus with Gaia & Herschel (Roccatagliata+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/877/29https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/877/29http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/877/29https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/877/29https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/877/29http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/877/29GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap7.952274030004205e-20 4.920466254354166e-19OpticalInfrareddefaultJ/ApJ/877/29/table4SMARTS/ANDICAM photometry for DQ TaurecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJD[6246.72/6691.57] Julian Date; JD-2450000dtime.epochfloatBmag[11.6/15.4]? The B band magnitudemagphot.mag;em.opt.Bdoublenullablee_Bmag[0.007/0.3]? 1{sigma} uncertainty in Bmagmagstat.error;phot.magdoublenullableVmag[10.8/13.7]? The V band magnitudemagphot.mag;em.opt.Vdoublenullablee_Vmag[0.004/0.6]? 1{sigma} uncertainty in Vmagmagstat.error;phot.magdoublenullableImag[9.5/11.4]? The I band magnitudemagphot.mag;em.opt.Idoublenullablee_Imag[0/0.05]? 1{sigma} uncertainty in Imagmagstat.error;phot.magdoublenullableJmag[8.4/9.6]? The J band magnitudemagphot.mag;em.IR.Jdoublenullablee_Jmag[0.0003/0.4]? 1{sigma} uncertainty in Jmagmagstat.error;phot.magdoublenullableHmag[7.6/8.6]? The H band magnitudemagphot.mag;em.IR.Hdoublenullablee_Hmag[0.0002/0.3]? 1{sigma} uncertainty in Hmagmagstat.error;phot.magdoublenullableKmag[7/8.3]? The K band magnitudemagphot.mag;em.IR.Kdoublenullablee_Kmag[0.0001/0.4]? 1{sigma} uncertainty in Kmagmagstat.error;phot.magdoublenullable