J/A+A/602/A33ivo://CDS.VizieR/J/A+A/602/A33doi:10.26093/cds/vizier.36020033CDSFrasca A.Biazzo K.Alcala J.M.Manara C.F.Stelzer B.Covino E.,Antoniucci S.2019-05-09T15:15:51Z2017-05-31T09:35:45ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsyoung-stellar-objectsspectroscopyeffective-temperatureradial-velocityA homogeneous determination of basic stellar parameters of young stellar object (YSO) candidates is needed to confirm their pre-main sequence evolutionary stage, membership to star forming regions (SFRs), and to get reliable values of the quantities related to chromospheric activity and accretion. We used the code ROTFIT and synthetic BT-Settl spectra for the determination of the atmospheric parameters (Teff and logg), the veiling (r), the radial (RV) and projected rotational velocity (vsini), from X-Shooter spectra of 102 YSO candidates (95 of infrared Class II and seven Class III) in the Lupus SFR. The spectral subtraction of inactive templates, rotationally broadened to match the vsini of the targets, enabled us to measure the line fluxes for several diagnostics of both chromospheric activity and accretion, such as H{alpha}, H{beta}, CaII, and NaI lines. We have shown that 13 candidates can be rejected as Lupus members based on their discrepant RV with respect to Lupus and/or the very low logg values. At least 11 of them are background giants, two of which turned out to be lithium-rich giants. Regarding the members, we found that all ClassIII sources have H{alpha} fluxes compatible with a pure chromospheric activity, while objects with disks lie mostly above the boundary between chromospheres and accretion. YSOs with transitional disks displays both high and low H{alpha} fluxes. We found that the line fluxes per unit surface are tightly correlated with the accretion luminosity (L_acc_) derived from the Balmer continuum excess. This rules out that the relationships between L_acc_ and line luminosities found in previous works are simply due to calibration effects. We also found that the CaII-IRT flux ratio is always small, indicating an optically thick emission source. The latter can be identified with the accretion shock near the stellar photosphere. The Balmer decrement reaches instead, for several accretors, high values typical of optically thin emission, suggesting that the Balmer emission originates in different parts of the accretion funnels with a smaller optical depth.2017A&A...602A..33Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/602/A33CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/658/480 : Pre-main-sequence stars in Lupus association (Makarov+, 2007)J/ApJS/177/551 : Spitzer c2d survey of Lupus dark clouds (Merin+, 2008)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/A+A/580/A26 : T Tauri star population in Lupus (Galli+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/602/A33https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/602/A33http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/602/A33https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/602/A33https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/602/A33http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/602/A33GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/602/A33/table1 (Stellar Parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/602/A33/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/602/A33/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/602/A33/table1?GETtext/xml+votable180.050000true234.8678333-34.77166670.005555555555555556Cone search capability for table J/A+A/602/A33/table2 (H{alpha}, H{beta}, CaII, and NaI fluxes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/602/A33/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/602/A33/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/602/A33/table2?GETtext/xml+votable180.050000true234.8678333-34.77166670.005555555555555556Cone search capability for table J/A+A/602/A33/table3 (Pa{gamma}, Pa{beta}, and Br{gamma} fluxes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/602/A33/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/602/A33/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/602/A33/table3?GETtext/xml+votable180.050000true234.8678333-34.77166670.0055555555555555565/10649 6/42595 42605 42609-42611 42614-42615 42621 42693 42704-42705 42707 42713-42714 42727 42736-42738https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/602/A33?format=asciidefaultJ/A+A/602/A33/table1Stellar ParametersSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_Nameindicates fluxes datameta.ref.urlcharNameNamemeta.id;meta.maincharprimaryRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainHJDReduced Heliocentric Julian day (HJD-2400000)dtime.epoch;pos.heliocentricdoublefMemb[Y/N] Membership flag (1)meta.code.membercharClass? Classification based on the SEDmeta.code.classcharTeffEffective temperatureKphys.temperature.effectiveinte_TeffEffective temperature errorKstat.error;phys.temperature.effectiveintlogg? Logarithm of surface gravitylog(cm.s**-2)phys.gravityfloatnullablee_logg? Error on logarithm of surface gravitylog(cm.s**-2)stat.errorfloatnullablel_vsiniLimit flag on vsinimeta.code.error;phys.veloc.rotatcharvsini? Projected rotational velocitykm/sphys.veloc.rotatfloatnullablee_vsini? Projected rotational velocity errorkm/sstat.error;phys.veloc.rotatfloatnullableHRVHeliocentric Radial Velocitykm/sspect.dopplerVeloc;pos.heliocentricfloate_HRVHeliocentric Radial Velocity errorkm/sstat.errorfloatl_r970Limit flag on veiling at 970nmmeta.code.errorcharr970? Veiling at 970nmphys.absorptionfloatnullablel_r710Limit flag on veiling at 710nmmeta.code.errorcharr710? Veiling at 710nmphys.absorptionfloatnullablel_r620Limit flag on veiling at 620nmmeta.code.errorcharr620? Veiling at 620nmphys.absorptionfloatnullablel_r540Limit flag on veiling at 540nmmeta.code.errorcharr540? Veiling at 540nmphys.absorptionfloatnullablel_r450Limit flag on veiling at 450nmmeta.code.errorcharr450? Veiling at 450nmphys.absorptionfloatnullableMass? Stellar masssolMassphys.massfloatnullableAge? AgeMyrtime.agefloatnullableNotes[*abcde] Individual notes (2)meta.notecharJ/A+A/602/A33/table2H{alpha}, H{beta}, CaII, and NaI fluxesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameNamemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainW10Ha? H{alpha} full width at 10% of the peak levelkm/sspect.line.widthfloatnullablee_W10Ha? Error of W10Hakm/sstat.errorfloatnullablel_FHaLimit flag on H{alpha} fluxmeta.code.errorcharFHa? H{alpha} fluxmW.m**-2phot.flux;em.line.Halphadoublenullablee_FHa? H{alpha} flux errormW.m**-2stat.errordoublenullablel_FHbLimit flag on H{beta} fluxmeta.code.errorcharFHb? H{beta} fluxmW.m**-2phot.flux;em.line.Hbetadoublenullablee_FHb? H{beta} flux errormW.m**-2stat.errordoublenullablel_F8498Limit flag on CaII-8498 fluxmeta.code.errorcharF8498? CaII-8498 fluxmW.m**-2phot.fluxdoublenullablee_F8498? CaII-8498 flux errormW.m**-2stat.errordoublenullablel_F8542Limit flag on CaII-8542 fluxmeta.code.errorcharF8542? CaII-8542 fluxmW.m**-2phot.fluxdoublenullablee_F8542? CaII-8542 flux errormW.m**-2stat.errordoublenullablel_F8662Limit flag on CaII-8662 fluxmeta.code.errorcharF8662? CaII-8662 fluxmW.m**-2phot.fluxdoublenullablee_F8662? CaII-8662 flux errormW.m**-2stat.errordoublenullablel_FCaII-KLimit flag on CaII-K fluxmeta.code.errorcharFCaII-K? CaII-K fluxmW.m**-2phot.fluxdoublenullablee_FCaII-K? CaII-K flux errormW.m**-2stat.errordoublenullablel_FNa5890Limit flag on NaI-5890 fluxmeta.code.errorcharFNa5890? NaI-5890 fluxmW.m**-2phot.fluxdoublenullablee_FNa5890? NaI-5890 flux errormW.m**-2stat.errordoublenullablel_FNa5896Limit flag on NaI-5896 fluxmeta.code.errorcharFNa5896? NaI-5896 fluxmW.m**-2phot.fluxdoublenullablee_FNa5896? NaI-5896 flux errormW.m**-2stat.errordoublenullableJ/A+A/602/A33/table3Pa{gamma}, Pa{beta}, and Br{gamma} fluxesNameNamemeta.id;meta.maincharl_FPa-bLimit flag on Pa-{beta} fluxmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainl_FPa-gLimit flag on Pa-{gamma} fluxmeta.code.errorcharFPa-g? Paschen-{gamma} fluxmW.m**-2phot.fluxdoublenullablee_FPa-g? Paschen-{gamma} flux errormW.m**-2stat.errordoublenullableFPa-b? Paschen-{beta} fluxmW.m**-2phot.fluxdoublenullablee_FPa-b? Paschen-{beta} flux errormW.m**-2stat.errordoublenullablel_FBr-gLimit flag on Brackett-{gamma} fluxmeta.code.errorcharFBr-g? Brackett-{gamma} fluxmW.m**-2phot.fluxdoublenullablee_FBr-g? Brackett-{gamma} flux errormW.m**-2stat.errordoublenullable