J/MNRAS/484/5102ivo://CDS.VizieR/J/MNRAS/484/5102doi:10.26093/cds/vizier.74845102CDSKalari V.M.2024-08-19T20:16:52Z2021-11-03T14:02:05ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starsaccretioninfrared-photometryvisible-astronomybroad-band-photometryh-alpha-photometryThis paper presents optical (ugriH{alpha})-infrared (JHKs, 3.6-8.0um) photometry and Gaia astrometry of 55 Classical T-Tauri stars (CTTS) in the star-forming region Sh 2-012 and its central cluster NGC 6383. The sample was identified based on photometric H{alpha} emission linewidths, and has a median age of 2.8+/-1.6Myr, with a mass range between 0.3 and 1M_{sun}_. 94 per cent of CTTS with near-infrared cross-matches fall on the near-infrared T-Tauri locus, with all stars having mid-infrared photometry exhibiting evidence for accreting circumstellar discs. CTTS are found concentrated around the central cluster NGC 6383, and towards the bright rims located at the edges of Sh 2-012. Stars across the region have similar ages, suggestive of a single burst of star formation. Mass accretion rates dMacc/dt) estimated via H{alpha} and u-band line intensities show a scatter (0.3dex) similar to spectroscopic studies, indicating the suitability of H{alpha} photometry to estimate dMacc/dt. Examining the variation of dMacc/dt with stellar mass (M*), we find a smaller intercept in the (dMacc/dt)-M* relation than oft-quoted in the literature, providing evidence to discriminate between competing theories of protoplanetary disc evolution.2019MNRAS.484.5102Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/484/5102CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)II/341 : VPHAS+ DR2 survey (Drew+, 2016)J/MNRAS/453/1026 : Lagoon Nebula M8 T tauri accretion rates (Kalari+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/484/5102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/484/5102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/484/5102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/484/5102https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/484/5102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/484/5102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/484/5102/table1 (Estimated results)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/484/5102/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/484/5102/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/484/5102/table1?GETtext/xml+votable180.050000true262.4457083-32.55116670.0055555555555555566/28809-28811https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/484/5102?format=asciiOpticalInfrareddefaultJ/MNRAS/484/5102/table1Estimated resultsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVPHASDR2sourceID from VPHAS+ DR2 (Drew et al., 2016, Cat. II/341)meta.id;meta.maincharRAJ2000Right Ascension (J2000)degpos.eq.ra;meta.maine_MassStandard error on masssolMassstat.error;phys.massfloat(dMac/dt)HaAccretion rate derived from the H{alpha} linesolMass/yrarith.ratefloate_(dMac/dt)HaStandard error on (dMac/dt)HasolMass/yrstat.errorfloat(dMac/dt)u? Accretion rate derived from u photometrysolMass/yrarith.ratefloatnullablee_(dMac/dt)u? Standard error on (dMac/dt)usolMass/yrstat.errorfloatnullableDEJ2000Declination (J2000)degpos.eq.dec;meta.mainumag? u magnitudemagphot.mag;em.opt.Ufloatnullablee_umag? rms uncertainty on umagmagstat.error;phot.magfloatnullablegmagg magnitudemagphot.mag;em.opt.Bfloate_gmagrms uncertainty on gmagmagstat.error;phot.magfloatrmagr magnitudemagphot.mag;em.opt.Rfloate_rmagrms uncertainty on rmagmagstat.error;phot.magfloatHamagH{alpha} magnitudemagphot.flux;em.line.Halphafloate_Hamagrms uncertainty on Hamagmagstat.error;phot.magfloatimagi magnitudemagphot.mag;em.opt.Ifloate_imagrms uncertainty on imagmagstat.error;phot.magfloatpmRAProper motion in right ascension direction (pmRA*cosDE)mas/yrpos.pm;pos.eq.rafloate_pmRAStandard error of proper motion in right ascension directionmas/yrstat.error;pos.pm;pos.eq.rafloatpmDEProper motion in declination directionmas/yrpos.pm;pos.eq.decfloate_pmDEStandard error of proper motion in declination directionmas/yrstat.error;pos.pm;pos.eq.decfloatEWHaEquivalent width of H{alpha} line0.1nmspect.line.eqWidthfloate_EWHaStandard error on EWHa0.1nmstat.errorfloatAgeAgeMyrtime.agefloate_AgeStandard error on ageMyrstat.error;time.agefloatMassMasssolMassphys.massfloat