J/MNRAS/496/3257ivo://CDS.VizieR/J/MNRAS/496/3257doi:10.26093/cds/vizier.74963257CDSBredall J.W.Shappee B.J.Gaidos E.Jayasinghe T.Vallely P.,Stanek K.Z.Kochanek C.S.Gagne J.Hart K.Holoien T.W.-S.,Prieto J.L.Van Saders J.2025-05-22T20:16:01Z2023-10-12T15:23:37ZCDS support team

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

cds-question@unistra.frvariable-starsyoung-stellar-objectsmilky-way-galaxystellar-spectral-typesphotometryvisible-astronomySome young stellar objects such as T Tauri-like 'dipper' stars vary due to transient partial occultation by circumstellar dust, and observations of this phenomenon inform us of conditions in the planet-forming zones close to these stars. Although many dipper stars have been identified with space missions such as Kepler/K2, ground-based telescopes offer longer term and multiwavelength perspectives. We identified 11 dipper stars in the Lupus star-forming region in data from the All-Sky Automated Survey for SuperNovae (ASAS-SN), and further characterized these using observations by the Las Cumbres Global Observatory Telescope (LCOGT) and the Transiting Exoplanet Survey Satellite (TESS), as well as archival data from other missions. Dipper stars were identified from a catalogue of nearby young stars and selected based on the statistical significance, asymmetry, and quasi-periodicity or aperiodicity of variability in their ASAS-SN light curves. All 11 stars lie above or redwards of the zero-age main sequence and have infrared (IR) excesses indicating the presence of full circumstellar discs. We obtain reddening-extinction relations for the variability of seven stars using our combined ASAS-SN-TESS and LCOGT photometry. In all cases, the slopes are below the ISM value, suggesting larger grains, and we find a tentative relation between the slope (grain size) and the K_s_-[22{mu}m] IR colour regarded as a proxy for disc evolutionary state.2020MNRAS.496.3257Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/496/3257CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/366 : ASAS-SN catalog of variable stars (Jayasinghe+, 2018-2020)IV/39 : TESS Input Catalog version 8.2 (TIC v8.2) (Paegert+, 2021)J/AJ/147/82 : Monitoring of disk-bearing stars in NGC 2264 (Cody+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/496/3257https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/496/3257http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/496/3257https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/496/3257https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/496/3257http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/496/3257GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/496/3257/table2 (Average ASAS-SN V magnitudes, peak-to-peak variability, quasi-periodicity, flux asymmetry, and variability classification for all Lupus YSO members present in our catalogue, as well as additional information for quasi-periodic dippers)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/3257/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/3257/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/3257/table2?GETtext/xml+votable180.050000true236.323-34.3080.0055555555555555566/29234 29287 41880 41915 41947 41954 42463 42521 42555 42557 42597-42599 42605 42609 42611 42614-42615 42630 42653 42655 42658 42683 42685 42689 42700 42727-42729 42736 42738 42749 42851 43287 43292 43350 43414 43417 44059 44076 44111 441293.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/496/3257?format=asciiOpticaldefaultJ/MNRAS/496/3257/table2Average ASAS-SN V magnitudes, peak-to-peak variability, quasi-periodicity, flux asymmetry, and variability classification for all Lupus YSO members present in our catalogue, as well as additional information for quasi-periodic dippersNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainSpTypeSpectral typesrc.spTypecharr_SpTypeReference for SpType (1)meta.ref;pos.framecharVmagMean Johnson V-band magnitudemagphot.mag;em.opt.Vfloatp2pPeak-to-peak variability metric (2)phot.mag;arith.ratiofloatQQuasi-periodicity (3)stat.fit.paramfloatMFlux asymmetry (4)stat.fit.paramfloatDesigVariability classification (5)meta.code;src.varcharAg/AT? Extinction in the Sloan g-band to extinction in the TESS band ratiophys.absorptionfloatnullablee_Ag/AT? Error on Ag/ATstat.error;phys.abundfloatnullableAg/Ai? Extinction in the Sloan g-band to extinction in the Sloan i-band ratiophys.absorptionfloatnullablee_Ag/Ai? Error on Ag/Aistat.error;phys.abundfloatnullableSimbadNameSimbad column added by the CDSmeta.idcharnullable